THIS IS NOT TRUE IF THE NEXT HOP IS ON A MULTIACCESS MEDIA, IN WHICH...

1.This is not true if the next hop is on a multiaccess media, in which case the nexthop will be the ip

address of the router that is closest to the destination. This is described in the following sections.

Example:

RTA#

router bgp 100

neighbor 170.10.20.2 remote-as 300

neighbor 150.10.50.1 remote-as 100

network 150.10.0.0

RTB#

neighbor 150.10.30.1 remote-as 100

RTC#

router bgp 300

neighbor 170.10.20.1 remote-as 100

network 170.10.0.0

*RTC will advertise 170.10.0.0 to RTA with a NextHop = 170.10.20.2

*RTA will advertise 170.10.0.0 to RTB with a NextHop=170.10.20.2

(The external NextHop via EBGP is sent via IBGP)

Special care should be taken when dealing with multiaccess and NBMA

networks as described in the following sections.