bgp prefix-list question

Unanswered Question
Jun 12th, 2008

Is there a difference between coding

0.0.0.0/0 and 0.0.0.0/32 if accepting

only the default route from the provider?

I have this problem too.
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n.nandrekar Thu, 06/12/2008 - 04:35

0.0.0.0/32 is not a valid address as the /32 mask would mean exact match of the ip address which is not valid.

Regards,

Niranjan

atyalebipin Thu, 06/12/2008 - 04:41

hi dear friend,

In prefix-list /32 or /24 doesnt mean the wildcard bits dear.

It means the network prefix & hence /32 means any mask over here.

& 0/0 means only the default route.

You can check this on dynagen software.

atyalebipin Thu, 06/12/2008 - 04:37

Hi Friend,

Yes there is a difference in these two lists.

0.0.0.0/0 means only the default route is permitted or denied &

0.0.0.0/32 means any route is permitted or denied.

Thanks

Bipin

royalblues Thu, 06/12/2008 - 05:32

Bipin,

Actually Niranjan is correct.

Prefix list for permit any would be 0.0.0.0/0 le 32 and not 0.0.0.0/32

Narayan

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