fib 's entries for a prefix

Answered Question
Dec 14th, 2008
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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!


Correct Answer by Jon Marshall about 8 years 5 months 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 5 months 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
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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
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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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