R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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[RouterC-bgp] peer 2.2.2.2 connect-interface loopback 0
[RouterC-bgp] quit
[RouterC] ospf 1
[RouterC-ospf-1] area 0
[RouterC-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0
[RouterC-ospf-1-area-0.0.0.0] network 9.1.1.0 0.0.0.255
[RouterC-ospf-1-area-0.0.0.0] quit
[RouterC-ospf-1] quit
[RouterC] display bgp peer
BGP local router ID : 3.3.3.3
Local AS number : 65009
Total number of peers : 1 Peers in established state : 1
Peer AS MsgRcvd MsgSent OutQ PrefRcv Up/Down State
2.2.2.2 65009 7 10 0 0 00:06:09 Established
The output shows that Router C has established an IBGP peer relationship with Router B.
3. Configure EBGP:
{ The EBGP peers, Router A and Router B (usually belong to different ISPs), are located in different
ASs. Typically, their loopback interfaces are not reachable to each other, so directly connected
interfaces are used for establishing BGP sessions.
{ To enable Router C to access the network 8.1.1.0/24 connected directly to Router A, inject
n e t w o r k 8 .1.1.0 / 24 t o t h e B G P r o u t i n g t a b l e o f R o u t e r A .
# Configure Router A.
<RouterA> system-view
[RouterA] bgp 65008
[RouterA-bgp] router-id 1.1.1.1
[RouterA-bgp] peer 3.1.1.1 as-number 65009
[RouterA-bgp] network 8.1.1.1 24
[RouterA-bgp] quit
# Configure Router B.
[RouterB] bgp 65009
[RouterB-bgp] peer 3.1.1.2 as-number 65008
[RouterB-bgp] quit
# Display BGP peer information on Router B.
[RouterB] display bgp peer
BGP local router ID : 2.2.2.2
Local AS number : 65009
Total number of peers : 2 Peers in established state : 2
Peer AS MsgRcvd MsgSent OutQ PrefRcv Up/Down State
3.3.3.3 65009 12 10 0 3 00:09:16 Established
3.1.1.2 65008 3 3 0 1 00:00:08 Established