3com S7906E Manuel De Montage

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BGP GR Configuration

Network requirements

In the following figure are all BGP switches. Between Switch A and Switch B is an eBGP connection.

Switch B and Switch C are connected over an iBGP connection. Enable GR Capability for BGP so that

the communication between Switch A and Switch C is not affected when an active/standby main board

switchover occurs on Switch B.

Figure 1-28 Network diagram for BGP GR configuration

Configuration procedure

Configure Switch A

# Configure IP addresses for interfaces (omitted).

# Configure the eBGP connection.

<SwitchA> system-view

[SwitchA] bgp 65008

[SwitchA-bgp] router-id 1.1.1.1

[SwitchA-bgp] peer 200.1.1.1 as-number 65009

# Inject network 8.0.0.0/8 to the BGP routing table.

[SwitchA-bgp] network 8.0.0.0

# Enable GR capability for BGP.

[SwitchA-bgp] graceful-restart

Configure Switch B

# Configure IP addresses for interfaces (omitted).

# Configure the eBGP connection.

<SwitchB> system-view

[SwitchB] bgp 65009

[SwitchB-bgp] router-id 2.2.2.2

[SwitchB-bgp] peer 200.1.1.2 as-number 65008

# Configure the iBGP connection.

[SwitchB-bgp] peer 9.1.1.2 as-number 65009

# Redistribute direct routes.

[SwitchB-bgp] import-route direct

# Enable GR capability for BGP.

[SwitchB-bgp] graceful-restart

Configure Switch C