02-12-2009 10:08 AM - edited 03-04-2019 03:32 AM
All,
If I have three interfaces:
int lo1
ip address 172.5.5.5 255.255.255.255
int fa0/0
ip address 192.168.1.1 255.255.255.0
int s1/0
ip address 10.5.5.1 255.255.255.252
Would my network statements in BGP for s1/0 and lo1 look like:
network 10.5.5.0 mask 255.255.255.252
network 172.5.5.5 mask 255.255.255.255
network 192.168.1.0 mask 255.255.255.0
In other words, my masks in bgp should match what's on my interface, right? I know there's exceptions to the rule.
Thanks!
John
02-12-2009 10:18 AM
Yes, it must match the mask in the routing table.
__
Edison.
02-12-2009 10:20 AM
John
When you use the mask in the BGP network statement then BGP looks into the routing table for a prefix with exactly that mask. So you your BGP mask should match what in on your interface.
HTH
Rick
02-12-2009 10:26 AM
John,
That is correct. By the way, the mask configured on the network statement for 192.168.1.0 is the default maks for a class C prefix and will therefore not show in the config.
Regards
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