Interface query

[mani1910]

I have an DMZ network which has 10 DMZ interfaces from DMZ1 to DMZ 10.

I want to packet capture for an ip address in DMZ network.[10.10.x.x]

I want to do a packet capture but am not sure through which interface my traffic is flowing.

is there any way to find in CLI which interface this ip will flow to the destination.

[Rob Ingram]

@mani1910 

If you know the source interface and IP address, then you can run packet-tracer command, this will identify the egress interface and ultimately if the packet is allowed or denied.

If you run a packet capture you don't necessarily need to specify an interface, just filter on host addresses.

[mani1910]

Yes thanks for the info Rob.

But i know only source address, not sure of the interface by which it is configured.

is there any way we can get the interface details for the particular source and destination.

[Rob Ingram · Accepted solution]

@mani1910 

You could run "show route 10.10.x.x" that will identify the interface.

You could run a packet capture filtering on the source, that will identify the source interface.