SDWAN - Application visibility and flow visibility on vEDGE
The DPI Engine -
SDWAN having DPI feature for Deep Packet Inspection (DPI) , this allows to look in to the packet for basic application related information
The DPI engine can determine the content of packets and then classify the traffic flow as part of a specific app. This is a key part of the transition from packet-oriented to application-oriented networking. The level of network visibility that the DPI provides allows administrators to encode routing and firewall decisions based on applications.
Lets proceed for configuration of DPI inspection on vEDGE directly
Simple Confiuration
For DPI
vedge-01(config)# policy app-visibility
For Cflowd
vedge-01(config)# policy flow-visibility
Commit
Valdiate Configuration
vedge-01# show running-config policy
policy
app-visibility
flow-visibility
Validate Working
To Check the DPI use below command to check the traffic
vedge-01# show app dpi flows | tab
Source Dest
VPN Source IP Destination IP Port Port PROTOCOL APPLICATION FAMILY ACTIVE SINCE PACKETS OCTETS
----------------------------------------------------------------------------------------------------------------------------------------------------------
1 10.160.10.10 10.4.251.1 32958 22 tcp ssh Encrypted 2023-07-08T06:20:23+00:00 11 489
1 10.160.10.10 10.4.251.1 52667 8080 tcp tcp Network Service 2023-07-08T06:20:20+00:00 2 84
To check the flows
vedge-01# show app cflowd flows | tab
TCP TIME EGRESS INGRESS
SRC DEST IP CNTRL ICMP TOTAL TOTAL MIN MAX TO INTF INTF APP
VPN SRC IP DEST IP PORT PORT DSCP PROTO BITS OPCODE NHOP IP PKTS BYTES LEN LEN START TIME EXPIRE NAME NAME ID
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 10.4.251.1 10.160.10.10 0 0 0 1 0 2048 10.160.10.10 20 1680 84 84 Sat Jul 8 06:32:52 2023 59 ge0/3 ge0/0 0
1 10.160.10.10 10.4.251.1 0 0 0 1 0 0 10.1.1.60 20 1960 98 98 Sat Jul 8 06:32:52 2023 59 ge0/0 ge0/3 0
The both the DPI and Flow are help for troubleshooting the Traffic flows
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