Bgp Gr Configuration - H3C S5800 Series Configuration Manual

Preference: 0
NextHop: 2.0.1.1
BkNextHop: 0.0.0.0
RelyNextHop: 2.0.2.1
Tunnel ID: 0x0
State: Active Adv
Tag: 0
The above output shows that Switch C has one route to reach network 1.1.1.0/24, that is, Switch
C<—>Switch D<—>Switch A.

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 6-28 Network diagram for BGP GR configuration
Configuration procedure
1) 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
2) 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.
Cost: 100
Interface: Vlan-interface201
BkInterface:
Neighbor : 2.0.1.1
Label: NULL
Age: 00h09m54s
6-72