3com S7906E Manuel De Montage

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<SwitchB> system-view

[SwitchB] bgp 65009

[SwitchB-bgp] router-id 2.2.2.2

[SwitchB-bgp] peer 3.3.3.3 as-number 65009

[SwitchB-bgp] peer 3.3.3.3 connect-interface loopback 0

[SwitchB-bgp] quit

[SwitchB] ospf 1

[SwitchB-ospf-1] area 0

[SwitchB-ospf-1-area-0.0.0.0] network 2.2.2.2 32

[SwitchB-ospf-1-area-0.0.0.0] network 9.1.1.1 24

[SwitchB-ospf-1-area-0.0.0.0] quit

[SwitchB-ospf-1] quit

# Configure Switch C.

<SwitchC> system-view

[SwitchC] bgp 65009

[SwitchC-bgp] router-id 3.3.3.3

[SwitchC-bgp] peer 2.2.2.2 as-number 65009

[SwitchC-bgp] peer 2.2.2.2 connect-interface loopback 0

[SwitchC-bgp] quit

[SwitchC] ospf 1

[SwitchC-ospf-1] area 0

[SwitchC-ospf-1-area-0.0.0.0] network 3.3.3.3 32

[SwitchC-ospf-1-area-0.0.0.0] network 9.1.1.0 24

[SwitchC-ospf-1-area-0.0.0.0] quit

[SwitchC-ospf-1] quit

[SwitchC] 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 2 2 0 0 00:00:13 Established

The output information shows that Switch C has established an iBGP peer relationship with Switch B.

3) Configure

eBGP

The eBGP peers, Switch A and Switch B (usually belong to different carriers), are located in

different ASs. Gennerally, their loopback interfaces are not reachable to each other, so directly

connected interfaces are used for establishing BGP sessions.

To enable Switch C to access the network 8.1.1.0/24 connected directly to Switch A, inject network

8.1.1.0/24 to the BGP routing table of Switch A.

# Configure Switch A.

<SwitchA> system-view

[SwitchA] bgp 65008

[SwitchA-bgp] router-id 1.1.1.1

[SwitchA-bgp] peer 3.1.1.1 as-number 65009

[SwitchA-bgp] network 8.1.1.1 24

[SwitchA-bgp] quit

# Configure Switch B.