BGP network and ospf network

[petercinvest]

I understand that BGP is not a routing protocol, but I do see people put network command under router bgp 1 , for example network 11.11.11.11.

so what does this for? 

in OSPF, i can understand that if we put network 11.11.11.11, it advertise the network. is it same for bgp?

[milan.kulik]

Hi,

a) BGP is a routing protocol,

b) "network 11.11.11.11" under "router bgp 1" is one of ways how to get the 11.11.11.11 prefix into your router BGP table.

BR,

Milan

[petercinvest]

then what's the difference between under router bgp 1 command:

network 11.11.11.11 and neighbor 11.11.11.11

[milan.kulik]

Hi,

neighbor 11.11.11.11 is used to establish BGP peering to a neighbor.

network 11.11.11.11 is used to get the  local 11.11.11.11 prefix to the BGP table.

Read the command reference or this discussion:

https://supportforums.cisco.com/discussion/11495456/fundamental-bgp-network-xxxx-command-question

BR,

Milan

[Joseph W. Doherty]

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Posting

As already noted by Milan, BGP is a routing protocol.

As also already noted by Milan, you can use a BGP network statement to inform BGP to accept a network prefix, but the network statement works a bit differently for BGP than it does for OSPF.