show interface command

[lm20ele]

Don't know exactly know why.

I assigned int Gi0/1 to vlan 450 and I assigned int vlan 450 an IP address. When I check the pkts/sec on int vlan 400 shows 0 pks/sec and when I show int gi0/1 shows 1120 pkts/sec. What is going on. Am I suppose to see about the same amount of traffic??

[binhkdinh]

Gi0/1 is assigned to VLAN 450, and you do "show int VLAN 400"?

Is this a typo?

[lm20ele]

yes It is a typo

sorry.

[Edison Ortiz]

You won't see the same amount of traffic. Most of the traffic will be Layer3 or Layer2 switched and won't use the SVI (Switch Virtual Interface) Vlan 450.

[lm20ele]

I'm using using this devices as a router and I was expecting to see traffic going out on int vlan 450.

So becuase most of my traffic is Layer 3 is not using the svi?? and going directly to the physical interface? I kind of loose the definition of SVI on this scenario.

[Edison Ortiz]

Most of the traffic is Layer3 switched vs Layer3 routed.

Layer3 routed is what you use when the SVI transports the data from one segment to another.

The router builds a table that has the ingress/egress ports associated with IP address to make forwarding decision. It relies on the SVI, when the information has age-out and no longer on the table.

[lm20ele]

Can I find any further reading?

Does this happen because of CEF?

[Edison Ortiz]

No, it relies on the mac-address-table to make forwarding decision.

HTH,

____

Edison.