NEXUS - 9K - vPC Peer Gateway - LAB Results

vPC PEER GATEWAY WORK  

vPC Peer-Gateway allows a vPC peer device to act as the active gateway for packets addressed to the other peer device router MAC. It keeps the forwarding of traffic local to the vPC peer device and avoids use of the peer-link. There is no impact on traffic and functionality when activates the Peer-Gateway capability

N9k-1(config)# vpc domain 1

N9k-1(config-vpc-domain)# peer-gateway

AFTER APPLYING Peer Gateway Command 
Gateway marked "G" on vPC Peerlink NXOS2 






Strong Recommendations
Peer-gateway must be enabled before Layer 3 peer-router.
Both vPC peers must have Layer 3 peer-router configured 
in order to take effect.Enable Supress-arp as a best 
practice while multicast ip address for VXLAN.Use separate 
loopback ip address for control and dataplane in vPC VXLAN fabric.
In vPC with MSTP, bridge priority must be same on both vPC peers.
For best convergence results fine tune 
vPC delay restore and NVE interface holddown timers.

Post Validation Check
      show version
      show module
      show diagnostics result module all detail
      show environment
      show license usage
      show interface status
      show ip interface brief
      show interface status err-disabled
      show cdp neighbors
      show redundancy status
      show spanning-tree summary
      show port-channel summary
      show vpc
      show vpc brief
      show vpc role
      show vpc peer-keepalives
      show vpc statistics peer-keepalive
      show vpc consistency-parameters global
      show vpc consistency-parameters interface port-channel1
      show vpc consistency-parameters vlans
      show hsrp brief
      show vrrp brief

NEXUS - GNS3 vPC LAB - How PEER SWITCH Work - ethanalyzer - CASES

 NEXUS - GNS3 vPC LAB

This Lab help to provide information about behavior of vPC Normal and during Peer Switch enabled condition how Root bridge selected or how send BPDU 

Below Configuration for both the vPC Memeber SWITCHES  for Spanning tree

Both Peers vPC Configuration 

SPANNING TREE INFORMATION FOR CURRENT NEXUS 

ethanalyzer Tools in Nexus for capture the traffic forwarding from Nexus boxs 

Capture packet on Port-channel 10 (Peer Link ) and 11 (vPC)

NX01# ethanalyzer local interface port-channel 10 limi

limit-captured-frames   limit-frame-size

NX01# ethanalyzer local interface port-channel 10 limit-captured-frames 10 Capturing on unknown-interface(Po10)

2021-05-05 13:47:30.524839 00:01:00:01:00:01 -> 01:80:c2:00:00:0e LLC U, func=UI; SNAP, OUI 0x00000C (Cisco), PID 0x8840

2021-05-05 13:47:30.535994 00:01:00:01:00:01 -> 01:80:c2:00:00:0e LLC U, func=UI; SNAP, OUI 0x00000C (Cisco), PID 0x8840

2021-05-05 13:47:30.574655 0c:e2:ed:00:01:02 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 3  Port = 0x9009

2021-05-05 13:47:30.574703 0c:e2:ed:00:01:02 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 3  Port = 0x9009

2021-05-05 13:47:31.015020 0c:bb:dc:00:01:02 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x9009

2021-05-05 13:47:31.072822 0c:e2:ed:00:01:02 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/0c:bb:dc:00:1b:08  Cost = 3  Port = 0x9009

2021-05-05 13:47:31.276529 00:00:00:00:00:00 -> 00:00:00:00:00:00 MDS Header [Malformed Packet]

2021-05-05 13:47:31.519214 0c:bb:dc:00:01:02 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x9009

2021-05-05 13:47:31.519360 0c:bb:dc:00:01:02 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x9009

2021-05-05 13:47:32.518699 00:01:00:01:00:01 -> 01:80:c2:00:00:0e LLC U, func=UI; SNAP, OUI 0x00000C (Cisco), PID 0x8840

10 packets captured

 

NX01# ethanalyzer local interface port-channel 11 limit-captured-frames 10

Capturing on unknown-interface(Po11)

2021-05-05 13:48:54.997736 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

2021-05-05 13:48:56.998359 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

2021-05-05 13:48:58.997726 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

2021-05-05 13:49:00.998087 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

2021-05-05 13:49:02.998657 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

2021-05-05 13:49:04.998325 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

2021-05-05 13:49:06.997591 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

2021-05-05 13:49:08.997605 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

2021-05-05 13:49:10.998482 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

2021-05-05 13:49:12.998724 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x900a

10 packets captured

NX01#

 

NX02# ethanalyzer local interface port-channel 10 limit-captured-frames 10

Capturing on unknown-interface(Po10)

2021-05-05 13:50:15.778012 0c:bb:dc:00:01:02 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x9009

2021-05-05 13:50:15.778075 0c:bb:dc:00:01:02 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x9009

2021-05-05 13:50:16.833245 0c:e2:ed:00:01:02 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 3  Port = 0x9009

2021-05-05 13:50:16.833873 0c:e2:ed:00:01:02 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 3  Port = 0x9009

2021-05-05 13:50:16.919037 00:01:00:01:00:01 -> 01:80:c2:00:00:0e LLC U, func=UI; SNAP, OUI 0x00000C (Cisco), PID 0x8840

2021-05-05 13:50:16.927743 00:01:00:01:00:01 -> 01:80:c2:00:00:0e LLC U, func=UI; SNAP, OUI 0x00000C (Cisco), PID 0x8840

2021-05-05 13:50:17.277738 0c:bb:dc:00:01:02 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x9009

2021-05-05 13:50:17.333087 0c:e2:ed:00:01:02 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/0c:bb:dc:00:1b:08  Cost = 3  Port = 0x9009

2021-05-05 13:50:17.778337 0c:bb:dc:00:01:02 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x9009

2021-05-05 13:50:17.778410 0c:bb:dc:00:01:02 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/0c:bb:dc:00:1b:08  Cost = 0  Port = 0x9009

10 packets captured

NX02#

 

NX02# ethanalyzer local interface port-channel 11 limit-captured-frames 10

Capturing on unknown-interface(Po11)

2021-05-05 13:54:14.912477 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 13:54:14.927755 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 13:54:16.916463 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 13:54:16.927493 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 13:54:18.945327 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 13:54:18.956104 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 13:54:20.916384 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 13:54:20.927865 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 13:54:22.695310 53:4f:46:54:57:41 -> 4c:45:41:53:45:20 0x5245 Ethernet II2021-05-05 13:54:22.900725 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x814110 packets captured

NX02#

PROBLEM

 CASE  1 - PEER1 ACTIVE ROOT down 

Now PEER1 AVTICE come UP again

 

---> Now you notice PEER2 beocome ROOT secondary

 

2021 May  5 13:59:38 NX02 %ETH_PORT_CHANNEL-5-PORT_SUSPENDED: Ethernet1/1: Ethernet1/1 is suspended

2021 May  5 13:59:38 NX02 %ETH_PORT_CHANNEL-5-PORT_SUSPENDED: Ethernet1/2: Ethernet1/2 is suspended

2021 May  5 14:02:15 NX02 %ETH_PORT_CHANNEL-5-PORT_UP: port-channel10: Ethernet1/1 is up

2021 May  5 14:02:15 NX02 %ETH_PORT_CHANNEL-5-PORT_UP: port-channel10: Ethernet1/2 is up

2021 May  5 14:02:17 NX02 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel10: first operational port changed from none to Ethernet1/1

2021 May  5 14:02:17 NX02 %ETHPORT-5-IF_BANDWIDTH_CHANGE: Interface port-channel10,bandwidth changed to 1000000 Kbit

2021 May  5 14:02:17 NX02 %ETHPORT-5-IF_UP: Interface Ethernet1/1 is up in mode trunk

2021 May  5 14:02:17 NX02 %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 1,10,200 on Interface port-channel10 are being suspended. (Reason: peer-keepalive not operational, peer never alive)

2021 May  5 14:02:17 NX02 %ETHPORT-5-IF_UP: Interface port-channel10 is up in mode trunk

2021 May  5 14:02:17 NX02 %ETHPORT-5-IF_BANDWIDTH_CHANGE: Interface port-channel10,bandwidth changed to 2000000 Kbit

2021 May  5 14:02:17 NX02 %ETHPORT-5-IF_UP: Interface Ethernet1/2 is up in modetrunk

2021 May  5 14:02:24 NX02 %ETHPORT-3-IF_ERROR_VLANS_REMOVED: VLANs 1,10,200 on Interface port-channel10 are removed from suspended state.

NX02#

Peer-switch Enabled 

Both Boxs claim for Root now 

CAPTURE PACKET FOR PORT-CHANNEL 11 and 10 Again and see the difference 

NX02# ethanalyzer local interface port-channel 11 limit-captured-frames 10

Capturing on unknown-interface(Po11)

2021-05-05 14:25:36.497554 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:25:36.507197 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:25:37.056026 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:25:38.466302 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:25:38.476323 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:25:39.056047 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:25:40.445177 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:25:40.455407 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:25:41.055678 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:25:42.464988 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

10 packets captured

NX02#

NX02# ethanalyzer local interface port-channel 11 limit-captured-frames 10

Capturing on unknown-interface(Po11)

2021-05-05 14:26:34.502891 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:26:34.513080 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:26:35.043963 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:26:36.465951 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:26:36.476495 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:26:37.044815 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:26:38.512964 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:26:38.523977 cc:02:0e:f0:f2:0a -> 01:80:c2:00:00:00 STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

2021-05-05 14:26:39.043321 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:26:40.517822 cc:02:0e:f0:f2:0a -> 01:00:0c:cc:cc:cd STP Conf. Root = 32768/0/cc:02:0e:f0:00:00  Cost = 0  Port = 0x8141

10 packets captured

 

NX02# ethanalyzer local interface port-channel 10 limit-captured-frames 10

Capturing on unknown-interface(Po10)

2021-05-05 14:27:28.486956 0c:bb:dc:00:01:01 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:27:28.487134 0c:bb:dc:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:27:28.792774 0c:e2:ed:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/200/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:27:28.987865 0c:bb:dc:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:27:28.987894 0c:bb:dc:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/200/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:27:29.542927 0c:e2:ed:00:01:01 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:27:29.543028 0c:e2:ed:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:27:30.042356 0c:e2:ed:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:27:30.492050 0c:bb:dc:00:01:01 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:27:30.492326 0c:bb:dc:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

10 packets captured

 

NX01# ethanalyzer local interface port-channel 10 limit-captured-frames 10

Capturing on unknown-interface(Po10)

2021-05-05 14:28:12.344368 0c:e2:ed:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/200/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:28:12.537338 0c:bb:dc:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:28:12.537387 0c:bb:dc:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/200/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:28:13.094174 0c:e2:ed:00:01:01 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:28:13.094999 0c:e2:ed:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:28:13.594707 0c:e2:ed:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:28:14.037685 0c:bb:dc:00:01:01 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:28:14.037837 0c:bb:dc:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:28:14.345380 0c:e2:ed:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/200/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

2021-05-05 14:28:14.537426 0c:bb:dc:00:01:01 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x9009

10 packets captured

 

NX01# ethanalyzer local interface port-channel 11 limit-captured-frames 10

Capturing on unknown-interface(Po11)

2021-05-05 14:28:54.537089 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:28:56.536806 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:28:58.537538 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:29:00.536841 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:29:02.537114 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:29:04.537285 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:29:06.537051 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:29:08.537300 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:29:10.537517 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

2021-05-05 14:29:12.536317 00:26:f0:0b:00:00 -> 01:00:0c:cc:cc:cd STP Conf. Root = 0/10/00:23:04:ee:be:0a  Cost = 0  Port = 0x900a

10 packets captured

 NORMAL CONDITION (No Peer-switch)

N9K1 – Root primary

N9K2- Root Secondary 

 

SWITCH Port-channel 10 (Access vlan 10)

N9K1# ethanalyzer local interface inband

Capturing on inband

2021-06-14 18:18:55.536910 0c:53:c4:0e:59:08 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/0c:53:c4:02:1f:07  Cost = 4  Port = 0x9000

2021-06-14 18:18:55.538472 0c:53:c4:0e:59:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/0c:53:c4:02:1f:07  Cost = 4  Port = 0x9000

2021-06-14 18:18:55.580894   10.10.10.1 -> 224.0.0.102  HSRPv2 Hello (state Standby)

2021-06-14 18:18:56.290467 0c:53:c4:0e:59:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 4  Port = 0x9000

2021-06-14 18:18:56.292159 0c:53:c4:0e:59:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/20/0c:53:c4:02:1f:07  Cost = 4  Port = 0x9000

2021-06-14 18:18:56.294155 0c:53:c4:0e:59:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 32768/30/0c:53:c4:02:1f:07  Cost = 4  Port = 0x9000

2021-06-14 18:18:57.539662 0c:53:c4:0e:59:08 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/0c:53:c4:02:1f:07  Cost = 4  Port = 0x9000

2021-06-14 18:18:57.541758 0c:53:c4:0e:59:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/0c:53:c4:02:1f:07  Cost = 4  Port = 0x9000

2021-06-14 18:18:58.289118 0c:53:c4:0e:59:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 4  Port = 0x9000

2021-06-14 18:18:58.291498 0c:53:c4:0e:59:08 -> 01:00:0c:cc:cc:cd STP RST. Root 10 packets captured

= 0/20/0c:53:c4:02:1f:07  Cost = 4  Port = 0x9000

N9K1# sh int vlan 10

Vlan10 is up, line protocol is up, autostate enabled

  Hardware is EtherSVI, address is 0c53.c402.1f07

  Internet Address is 10.10.10.2/24

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

   reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not supported

  ARP type: ARPA

  Last clearing of "show interface" counters never

  L3 in Switched:

    ucast: 0 pkts, 0 bytes

  

N9K2# ethanalyzer local interface inband

Capturing on inband

2021-06-14 18:20:04.905310 0c:53:c4:02:1f:08 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9000

2021-06-14 18:20:04.907005 0c:53:c4:02:1f:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9000

2021-06-14 18:20:04.917162   10.10.10.2 -> 224.0.0.102  HSRPv2 Hello (state Active)

2021-06-14 18:20:05.160789 0c:53:c4:02:1f:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9000

2021-06-14 18:20:05.163310 0c:53:c4:02:1f:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/20/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9000

2021-06-14 18:20:05.166247 0c:53:c4:02:1f:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 32768/30/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9000

2021-06-14 18:20:06.115262 00:00:00:00:00:00 -> 00:00:00:00:00:00 MDS Header [Malformed Packet]

2021-06-14 18:20:06.905987 0c:53:c4:02:1f:08 -> 01:80:c2:00:00:00 STP RST. Root= 0/1/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9000

2021-06-14 18:20:06.907910 0c:53:c4:02:1f:08 -> 01:00:0c:cc:cc:cd STP RST. Root= 0/1/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9000

2021-06-14 18:20:07.157960 0c:53:c4:02:1f:08 -> 01:00:0c:cc:cc:cd STP RST. Rootn = 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9000

10 packets captured

N9K2#

 

N9K2# sh int vlan 10

Vlan10 is up, line protocol is up, autostate enabled

  Hardware is EtherSVI, address is 0c53.c40e.5907

  Internet Address is 10.10.10.1/24

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

   reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not supported

  ARP type: ARPA

  Last clearing of "show interface" counters never

  L3 in Switched:

    ucast: 0 pkts, 0 bytes

 

 

 

SWITCH# ethanalyzer local interface inband

Capturing on inband

2021-06-14 18:25:39.564443 00:26:f0:0a:00:00 -> 01:80:c2:00:00:00 STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9009

2021-06-14 18:25:41.567245 00:26:f0:0a:00:00 -> 01:80:c2:00:00:00 STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9009

2021-06-14 18:25:43.566200 00:26:f0:0a:00:00 -> 01:80:c2:00:00:00 STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9009

2021-06-14 18:25:45.586173 00:26:f0:0a:00:00 -> 01:80:c2:00:00:00 STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9009

2021-06-14 18:25:47.567426 00:26:f0:0a:00:00 -> 01:80:c2:00:00:00 STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9009

2021-06-14 18:25:49.564038 00:26:f0:0a:00:00 -> 01:80:c2:00:00:00 STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9009

2021-06-14 18:25:51.566568 00:26:f0:0a:00:00 -> 01:80:c2:00:00:00 STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9009

2021-06-14 18:25:53.565686 00:26:f0:0a:00:00 -> 01:80:c2:00:00:00 STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9009

2021-06-14 18:25:55.567098 00:26:f0:0a:00:00 -> 01:80:c2:00:00:00 STP RST. Root= 0/10/0c:53:c4:02:1f:07  Cost = 0  Port = 0x9009

2021-06-14 18:25:56.288230 00:00:00:00:00:00 -> 00:00:00:00:00:00 MDS Header [Malformed Packet]

10 packets captured

 

SWITCH# sh int port-channel 10

port-channel10 is up

admin state is up,

  Hardware: Port-Channel, address: 0c53.c495.a908 (bia 0c53.c495.a908)

  MTU 1500 bytes, BW 2000000 Kbit, DLY 10 usec

  reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, medium is broadcast

 

 

SWITCH# debug spanning-tree b

bpdu_rx   bpdu_tx

SWITCH# debug spanning-tree bpdu_rx

SWITCH# 2021 Jun 14 18:37:13.564629 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:13.564766 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:13.564970 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00000014 H:0002 F:000f

2021 Jun 14 18:37:13.565013 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:13.565037 stp:         : repeated-designated on port root

2021 Jun 14 18:37:13.565046 stp: RSTP(10): port-channel10 rcvd info remaining 6

2021 Jun 14 18:37:13.651623 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:13.651770 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:13.651791 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00010014 H:0002 F:000f

2021 Jun 14 18:37:13.651832 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:13.651841 stp:         : repeated-designated on port root

2021 Jun 14 18:37:13.651849 stp: RSTP(10): port-channel10 rcvd info remaining 6

2021 Jun 14 18:37:15.565706 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:15.565810 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:15.565827 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00000014 H:0002 F:000f

2021 Jun 14 18:37:15.565865 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:15.565952 stp:         : repeated-designated on port root

2021 Jun 14 18:37:15.565975 stp: RSTP(10): port-channel10 rcvd info remaining 6

2021 Jun 14 18:37:15.652929 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:15.653031 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:15.653049 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00010014 H:0002 F:000f

2021 Jun 14 18:37:15.653089 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:15.653098 stp:         : repeated-designated on port root

2021 Jun 14 18:37:15.653106 stp: RSTP(10): port-channel10 rcvd info remaining 6

2021 Jun 14 18:37:17.564632 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:17.564752 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:17.564770 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00000014 H:0002 F:000f

2021 Jun 14 18:37:17.564807 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:17.564816 stp:         : repeated-designated on port root

2021 Jun 14 18:37:17.564825 stp: RSTP(10): port-channel10 rcvd info remaining 6

2021 Jun 14 18:37:17.651041 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:17.651184 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:17.651217 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00010014 H:0002 F:000f

2021 Jun 14 18:37:17.651313 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:17.651328 stp:         : repeated-designated on port root

2021 Jun 14 18:37:17.651341 stp: RSTP(10): port-channel10 rcvd info remaining 6

un2021 Jun 14 18:37:19.564458 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:19.564647 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:19.564689 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00000014 H:0002 F:000f

2021 Jun 14 18:37:19.564768 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:19.564965 stp:         : repeated-designated on port root

2021 Jun 14 18:37:19.564980 stp: RSTP(10): port-channel10 rcvd info remaining 6

2021 Jun 14 18:37:19.653418 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:19.653590 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:19.653718 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00010014 H:0002 F:000f

2021 Jun 14 18:37:19.653769 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:19.653783 stp:         : repeated-designated on port root

2021 Jun 14 18:37:19.653795 stp: RSTP(10): port-channel10 rcvd info remaining 6

SWITCH# unde

all       icmpv6    ipv6      l2fwder   l3vm      pktmgr    sockets

ecp       ip        l2        l2rib     mpls      rpm       system

SWITCH# unde 2021 Jun 14 18:37:21.563747 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:21.563767 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:21.563784 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00000014 H:0002 F:000f

2021 Jun 14 18:37:21.563837 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:21.563846 stp:         : repeated-designated on port root

2021 Jun 14 18:37:21.563854 stp: RSTP(10): port-channel10 rcvd info remaining 6

2021 Jun 14 18:37:21.659706 stp: BPDU RX: vb 1 vlan 10, ifi 0x16000009 (port-channel10)

2021 Jun 14 18:37:21.659729 stp: BPDU Rx: Received BPDU on vb 1 vlan 10 port port-channel10 pkt_len 60 bpdu_len 36 netstack flags 0x80000ed enc_type ieee

2021 Jun 14 18:37:21.659746 stp:  BPDU RX: vb 1 vlan 10 port port-channel10 len 60 flags 0x80000ed: Ethernet Hdr 0180c2000000<-0026f00a0000 type/len 0027: LLC 42 42 03 STP CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:00010014 H:0002 F:000f

2021 Jun 14 18:37:21.659802 stp: RSTP(10): msg on port-channel10

2021 Jun 14 18:37:21.659817 stp:         : repeated-designated on port root

2021 Jun 14 18:37:21.659835 stp: RSTP(10): port-channel10 rcvd info remaining 6

all

SWITCH# debug spanning-tree

 

Same priority on both peers

 

N9K1# sh spanning-tree root

 

                                        Root  Hello Max Fwd

Vlan                   Root ID          Cost  Time  Age Dly  Root Port

---------------- -------------------- ------- ----- --- ---  ----------------

VLAN0001             1 0c53.c402.1f07       0    2   20  15  This bridge is root

VLAN0010            10 0c53.c402.1f07       0    2   20  15  This bridge is root

VLAN0020            20 0c53.c402.1f07       0    2   20  15  This bridge is root

VLAN0030            30 0c53.c402.1f07       0    2   20  15  This bridge is root

N9K2# sh spanning-tree root

 

                                        Root  Hello Max Fwd

Vlan                   Root ID          Cost  Time  Age Dly  Root Port

---------------- -------------------- ------- ----- --- ---  ----------------

VLAN0001             1 0c53.c402.1f07       4    2   20  15     port-channel1

VLAN0010            10 0c53.c402.1f07       4    2   20  15     port-channel1

VLAN0020            20 0c53.c402.1f07       4    2   20  15     port-channel1

VLAN0030            30 0c53.c402.1f07       4    2   20  15     port-channel1

N9K2#

 

N9K1# debug spanning-tree bpdu_tx interface port-channel 10

N9K1# 2021 Jun 14 18:49:24.196441 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:49:24.196486 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:49:24.196776 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:0c:53:c4:02:1f:07 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

2021 Jun 14 18:49:26.196784 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:49:26.196889 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:49:26.196972 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:0c:53:c4:02:1f:07 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

2021 Jun 14 18:49:28.196435 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:49:28.196588 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:49:28.196676 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:0c:53:c4:02:1f:07 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

2021 Jun 14 18:49:30.195953 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:49:30.196037 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:49:30.196120 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:0c:53:c4:02:1f:07 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

2021 Jun 14 18:49:32.198020 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:49:32.198345 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:49:32.198637 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:0c:53:c4:02:1f:07 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

u2021 Jun 14 18:49:34.196534 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:49:34.196570 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:49:34.196687 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:0c:53:c4:02:1f:07 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

nde all

N9K1#

 

NO BPDU FORWARD

N9K2#  debug spanning-tree bpdu_tx interface port-channel 10

N9K2# sh spanning-tree in

inconsistentports   interface           internal

N9K2# sh spanning-tree inter

interface   internal

N9K2# sh spanning-tree interface port-channel 10

 

Vlan             Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

VLAN0010         Desg FWD 1         128.4105 (vPC) P2p

 

N9K2#

 

 

 

After PEER_SWITCH ENABLE

N9K2# debug spanning-tree bpdu_tx interface port-channel 10

N9K2# 2021 Jun 14 18:46:23.237936 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:46:23.238106 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:46:23.238446 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0001 M:0014 H:0002 F:000f

2021 Jun 14 18:46:25.236347 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:46:25.236377 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:46:25.236527 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0001 M:0014 H:0002 F:000f

2021 Jun 14 18:46:27.237915 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:46:27.238004 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:46:27.238302 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0001 M:0014 H:0002 F:000f

2021 Jun 14 18:46:29.236765 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:46:29.236922 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:46:29.237095 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0001 M:0014 H:0002 F:000f

2021 Jun 14 18:46:31.237007 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:46:31.237036 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:46:31.237113 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0001 M:0014 H:0002 F:000f

2021 Jun 14 18:46:33.238360 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:46:33.238403 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:46:33.238521 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0001 M:0014 H:0002 F:000f

unde al2021 Jun 14 18:46:35.236336 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:46:35.236384 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:46:35.236541 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0001 M:0014 H:0002 F:000f

l

N9K2#

 

N9K1# debug spanning-tree bpdu_tx interface port-channel 10

N9K1# 2021 Jun 14 18:47:18.196463 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:47:18.196576 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:47:18.196681 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

2021 Jun 14 18:47:20.196415 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:47:20.196523 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:47:20.196733 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

2021 Jun 14 18:47:22.196629 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:47:22.196696 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:47:22.196813 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

2021 Jun 14 18:47:24.196214 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:47:24.196267 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:47:24.196409 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

2021 Jun 14 18:47:26.198549 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:47:26.198581 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:47:26.198697 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

2021 Jun 14 18:47:28.196332 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:47:28.196427 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:47:28.196514 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

N9K1# 2021 Jun 14 18:47:30.196311 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:47:30.196342 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:47:30.196421 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

u2021 Jun 14 18:47:32.195932 stp: RSTP(10): transmitting RSTP BPDU on port-channel10

2021 Jun 14 18:47:32.196018 stp: vb_vlan_shim_send_bpdu(1923): VDC 1 Vlan 10 port port-channel10 enc_type 2 len 36

2021 Jun 14 18:47:32.196101 stp: BPDU TX: vb 1 vlan 10 port port-channel10 len 36 ->0180c2000000 CFG P:0000 V:02 T:02 F:3c R:00:0a:00:23:04:ee:be:0a 00000000 B:00:0a:00:23:04:ee:be:0a 9009 A:0000 M:0014 H:0002 F:000f

nde all

N9K1#