BGP confederation

[ikizoo4]

Hello

I try to configure complex BGP confederations, could anybody clear about this?

please take look at the attached diagram, and which one is correct?

only EBGP router with EBGP connection? has "bgp confederation peers"? or every BGP routers within AS has "bgp confederation peers"?

A

router1

router bgp 6500

bgp confederation identifier 100

bgp confederation peers 6501 6502

router2

router bgp 6502

bgp confederation identifier 100

bgp confederation peers 6501 6502

B

router1

router bgp 6500

bgp confederation identifier 100

router2

router bgp 6502

bgp confederation identifier 100

bgp confederation peers 6501

[Georg Pauwen]

Hello,

answer B is correct:

B

router1

router bgp 6500

bgp confederation identifier 100

router2

router bgp 6502

bgp confederation identifier 100

bgp confederation peers 6501

Only the routers on the edge of your sub-autonomous system are peering with the sub-autonomous systems with which they are directly peering. So, in your case, R2 is peering only with AS6501, while R1 only has an iBGP peering relationship with the neighboring router, and no direct peering relationship with any other sub-autonomous systems.

Does that make sense ?

Regards,

GP