To configure BGP peer session on “A” [p2p type=”slug” value=”router-basics”]Router [/p2p]This document will help understand[p2p type=”slug” value=”ebgp-vs-ibgp”] eBGP [/p2p]configuration across 2 JUNOS enabled [p2p type=”slug” value=”bgp-neighbor-states”]BGP[/p2p] Routers in different AS. Below is the diagram showing connectivity between devices, their [p2p type=”slug” value=”ip-addressing-scheme-ipv4″]IP address [/p2p]and AS number each belongs to –
TO CONFIGURE THE BGP PEER SESSION ON “HUB” ROUTER –
Step 1 –
Configure the interface to Peers A
user@HUB# set ge-1/2/0 unit 0 family inet address 192.168.1.1/30
Set the autonomous system (AS) number
Create the BGP group, and add the external neighbor addresses.
Step 4 –
Specify the autonomous system (AS) number of the external AS.
Step 5 –
Set the peer type to external BGP (EBGP)
TO CONFIGURE THE BGP PEER SESSION ON “A” ROUTER –
Step 6 –
Configure the interface to Peer HUB
user@A# set ge-1/2/0 unit 0 family inet address 192.168.1.2/30
Set the autonomous system (AS) number.
Step 8 –
Create the BGP group, and add the external neighbor addresses.
Step 9 –
Specify the autonomous system (AS) number of the external AS.
Step 10 –
Set the peer type to external BGP (EBGP).
VERIFICATION –
From configuration mode, confirm your configuration by entering the show interfaces, show protocols, and show routing-options commands.
Some of BGP status and neighborship command include –
- show bgp neighbor
- show bgp group
Additionally “Show BGP Summary” command output also provides information in addition to BGP neighorship –
Groups: 1 Peers: 1 Down peers: 0
Table Tot Paths Act Paths Suppressed History Damp State Pending
inet.0 0 0 0 0 0 0Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped…
192.168.1.2 22 8559 8470 0 0 2d 17:11:36 0/0/0/0
