BGP and RIP

[ahmadkhan]

Hi:

I always thought BGP and RIP (or any routing protocol for that matter) are layer-3 protocols. So why they have higher layer port numbers like TCP-170 for BGP?

[steve.barlow]

BGP runs on TCP (port 179). IP RIP runs over UDP port 521. They both run over IP.

See link for protocol numbers (eg IP=4, eigrp=88, ospf=89):

http://www.iana.org/assignments/protocol-numbers

Hope that helps.

Steve