fib 's entries for a prefix

Answered Question
Dec 14th, 2008

Hi everybody!

My cisco book shows an out put:

switch# show ip cef

prefix next hop interface

0.0.0.0/32 receive

192.168.199.0/24 attached vlan1

192.168.199.0/32 receive

192.168.199.1/32 receive

192.168.199.2/32 192.168.199.2 vlan1

192.168.199.255 receive.

My question is if we had physical interface say f0/1 not vlan 1, would we get the same entries in fib?

thanks a lot!

I have this problem too.
0 votes
Correct Answer by Jon Marshall about 8 years 1 month ago

0.0.0.0/32 receive

192.168.199.0/32 receive

192.168.199.1/32 receive

192.168.199.255 receive

The above 4 would be the same.

192.168.199.0/24 attached vlan1

192.168.199.2/32 192.168.199.2 vlan1

The above 2 would refer to a physical interface, f0/1 in your example.

Jon

Correct Answer by Harold Ritter about 8 years 1 month ago

Sarah,

It would indeed be the same. It doesn't matter to CEF whether the interface is physical or logical.

Regards

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Correct Answer
Harold Ritter Sun, 12/14/2008 - 07:13

Sarah,

It would indeed be the same. It doesn't matter to CEF whether the interface is physical or logical.

Regards

Correct Answer
Jon Marshall Sun, 12/14/2008 - 07:15

0.0.0.0/32 receive

192.168.199.0/32 receive

192.168.199.1/32 receive

192.168.199.255 receive

The above 4 would be the same.

192.168.199.0/24 attached vlan1

192.168.199.2/32 192.168.199.2 vlan1

The above 2 would refer to a physical interface, f0/1 in your example.

Jon

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