Configuring An Ebgp Multi-Hop Session Between 2 Avaya Secure Routers - Avaya 1000 Series Configuration Manual

Configuring BGP Features
Minimum time between advertisement runs is 30 seconds
For address family: IPv4 Unicast
BGP table version 1, neighbor version 1
Index 2, Offset 0, Mask 0x4
0 accepted prefixes consume 0 bytes
Prefix advertised 0, suppressed 0, withdrawn 0
Connections established 1; dropped 0
Last reset 00:01:51, due to Peer closed the session
External BGP neighbor may be up to 255 hops away
Connection state is ESTAB, I/O status: 1, unread input
bytes: 0
Local host: 60.60.60.3, Local port: 179
Foreign host: 60.60.60.1, Foreign port: 1049
External BGP neighbor may be up to 255 hops away in the above output means that the remote
neighbor is an EBGP-Multi-hop neighbor. EBGP Peers over an unnumbered WAN interface
needs to be configured as EBGP MULTI-HOP only.
Configuring an EBGP Multi-Hop Session between 2 Avaya Secure
Routers
CONFIGURATION OF Avaya1:
interface
link t1 4
encapsulation ppp
ip address 40.40.40.1 255.255.255.0
exit
interface
ip address 60.60.60.1 255.255.255.255
exit
ip route 60.60.60.2 255.255.255.255 40.40.40.2 1
conf term
router bgp 100
neighbor 60.60.60.2 200
update_source 60.60.60.1
ebgp_multihop
On an IBGP Multihop session we need to take care of only the update_source for getting the
BGP to an Established state, but in case of EBGP neighbors we have to specify the session
to be EBGP_MULTIHOP in their neighbor configuration itself.
CONFIGURATION OF Avaya2:
interface bundle ToAvaya1
link t1 4
304 Avaya Secure Router 1000 Series Configuration Guide
bundle ToAvaya2
loopback 1
December 2010