Example for Configuring a BGP4+ Route Reflector

Networking Requirements

As shown in Figure 1, four devices belong to two ASs. You are required to perform simplified configuration to ensure that the two ASs communicate with each other.

Figure 1 Networking diagram of configuring a BGP4+ route reflector
click to enlarge

Configuration Roadmap

The configuration roadmap is as follows:

Configure basic BGP4+ functions to allow BGP neighbors to communicate.
Configure SwitchC as a route reflector so that no IBGP connection needs to be established between SwitchB and SwitchD. This simplifies the configuration.

Procedure

Add interfaces to VLANs.

# Configure SwitchA. The configurations of SwitchB, SwitchC, and SwitchD are similar to the configuration of SwitchA.

<HUAWEI> system-view
[HUAWEI] sysname SwitchA
[SwitchA] vlan batch 10 20
[SwitchA] interface gigabitethernet 0/0/1
[SwitchA-GigabitEthernet0/0/1] port link-type trunk
[SwitchA-GigabitEthernet0/0/1] port trunk allow-pass vlan 10
[SwitchA-GigabitEthernet0/0/1] quit
[SwitchA] interface gigabitethernet 0/0/2
[SwitchA-GigabitEthernet0/0/2] port link-type trunk
[SwitchA-GigabitEthernet0/0/2] port trunk allow-pass vlan 20
[SwitchA-GigabitEthernet0/0/2] quit

Enable the IPv6 forwarding capability, and assign an IPv6 address for each interface.

# Configure SwitchA. The configurations of SwitchB, SwitchC, and SwitchD are similar to the configuration of SwitchA.

[SwitchA] ipv6
[SwitchA] interface vlanif 10
[SwitchA-Vlanif10] ipv6 enable
[SwitchA-Vlanif10] ipv6 address fc00:0:0:0:1::1/64
[SwitchA] interface vlanif 20
[SwitchA-Vlanif20] ipv6 enable
[SwitchA-Vlanif20] ipv6 address fc00:0:0:0:10::1/96
[SwitchA-Vlanif20] quit

Configure basic BGP4+ functions.

# Configure SwitchA.

[SwitchA] bgp 100
[SwitchA-bgp] router-id 10.1.1.1
[SwitchA-bgp] peer fc00:0:0:0:10::2 as-number 200
[SwitchA-bgp] ipv6-family unicast
[SwitchA-bgp-af-ipv6] peer fc00:0:0:0:10::2 enable
[SwitchA-bgp-af-ipv6] network fc00:0:0:0:1:: 64
[SwitchA-bgp-af-ipv6] network fc00:0:0:0:10:: 96
[SwitchA-bgp-af-ipv6] quit

# Configure SwitchB.

[SwitchB] bgp 200
[SwitchB-bgp] router-id 10.2.2.2
[SwitchB-bgp] peer fc00:0:0:0:10::1 as-number 100
[SwitchB-bgp] peer fc00:0:0:0:11::1 as-number 200
[SwitchB-bgp] ipv6-family unicast
[SwitchB-bgp-af-ipv6] peer fc00:0:0:0:10::1 enable
[SwitchB-bgp-af-ipv6] peer fc00:0:0:0:11::1 enable
[SwitchB-bgp-af-ipv6] network fc00:0:0:0:10:: 96
[SwitchB-bgp-af-ipv6] network fc00:0:0:0:11:: 96
[SwitchB-bgp-af-ipv6] quit
[SwitchB-bgp] quit

# Configure SwitchC.

[SwitchC] bgp 200
[SwitchC-bgp] router-id 10.3.3.3
[SwitchC-bgp] peer fc00:0:0:0:11::2 as-number 200
[SwitchC-bgp] peer fc00:0:0:0:12::2 as-number 200
[SwitchC-bgp] ipv6-family unicast
[SwitchC-bgp-af-ipv6] peer fc00:0:0:0:11::2 enable
[SwitchC-bgp-af-ipv6] peer fc00:0:0:0:12::2 enable
[SwitchC-bgp-af-ipv6] network fc00:0:0:0:11:: 96
[SwitchC-bgp-af-ipv6] network fc00:0:0:0:12:: 96
[SwitchC-bgp-af-ipv6] quit

# Configure SwitchD.

[SwitchD] bgp 200
[SwitchD-bgp] router-id 10.4.4.4
[SwitchD-bgp] peer fc00:0:0:0:12::1 as-number 200
[SwitchD-bgp] ipv6-family unicast
[SwitchD-bgp-af-ipv6] peer fc00:0:0:0:12::1 enable
[SwitchD-bgp-af-ipv6] network fc00:0:0:0:12:: 96
[SwitchD-bgp-af-ipv6] quit
[SwitchD-bgp] quit

Configure the route reflector.

# Configure SwitchC as the route reflector and SwitchB and SwitchD as the clients.

[SwitchC-bgp] ipv6-family unicast
[SwitchC-bgp-af-ipv6] peer fc00:0:0:0:11::2 reflect-client
[SwitchC-bgp-af-ipv6] peer fc00:0:0:0:12::2 reflect-client

# View the routing table of SwitchB.

[SwitchB] display bgp ipv6 routing-table

 BGP Local router ID is 10.2.2.2
 Status codes: * - valid, > - best, d - damped,
               h - history,  i - internal, s - suppressed, S - Stale
               Origin : i - IGP, e - EGP, ? - incomplete
 Total Number of Routes: 6
 *>  Network  : 1::                                      PrefixLen : 64     
     NextHop  : FC00:0:0:0:10::1                         LocPrf    :          
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : 100  i
 *>  Network  : FC00:0:0:0:10::                          PrefixLen : 96     
     NextHop  : ::                                       LocPrf    :          
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : i
    
     NextHop  : FC00:0:0:0:10::1                         LocPrf    :          
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : 100  i
 *>  Network  : FC00:0:0:0:11::                          PrefixLen : 96     
     NextHop  : ::                                       LocPrf    :          
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : i
   i
     NextHop  : FC00:0:0:0:11::1                         LocPrf    : 100       
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : i
 *>i Network  : FC00:0:0:0:12::                          PrefixLen : 96     
     NextHop  : FC00:0:0:0:11::1                         LocPrf    : 100       
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : i

# View the routing table of SwitchD.

[SwitchD] display bgp ipv6 routing-table

 BGP Local router ID is 10.4.4.4
 Status codes: * - valid, > - best, d - damped,
               h - history,  i - internal, s - suppressed, S - Stale
               Origin : i - IGP, e - EGP, ? - incomplete

 Total Number of Routes: 5
 *>i Network  : FC00:0:0:1::                             PrefixLen : 64     
     NextHop  : FC00:0:0:10::1                           LocPrf    : 100       
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : 100  i
 *>i Network  : FC00:0:0:10::                            PrefixLen : 96     
     NextHop  : FC00:0:0:11::2                           LocPrf    : 100       
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : i
 *>i Network  : FC00:0:0:11::                            PrefixLen : 96     
     NextHop  : FC00:0:0:12::1                           LocPrf    : 100       
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : i
 *>  Network  : FC00:0:0:12::                            PrefixLen : 96     
     NextHop  : ::                                       LocPrf    :          
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : i
   i
     NextHop  : FC00:0:0:12::1                           LocPrf    : 100       
     MED      : 0                                        PrefVal   : 0         
     Label    : 
     Path/Ogn : i

The routing tables show that SwitchD and SwitchB have learned the routing information advertised by SwitchA from SwitchC.

Configuration Files

SwitchA configuration file

#
sysname SwitchA
#
ipv6
#
vlan batch 10 20
#
interface Vlanif10
 ipv6 enable
 ipv6 address FC00:0:0:1::1/64
#
interface Vlanif20
 ipv6 enable
 ipv6 address FC00:0:0:10::1/96
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 10
#
interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 20
#
bgp 100
 router-id 10.1.1.1
 peer FC00:0:0:10::2 as-number 200
 #
 ipv4-family unicast
  undo synchronization
 #
 ipv6-family unicast
  undo synchronization
  network FC00:0:0:1:: 64
  network FC00:0:0:10:: 96
  peer FC00:0:0:10::2 enable
#
return

SwitchB configuration file

#
sysname SwitchB
#
ipv6
#
vlan batch 20 30
#
interface Vlanif20
 ipv6 enable
 ipv6 address FC00:0:0:10::2/96
#
interface Vlanif30
 ipv6 enable
 ipv6 address FC00:0:0:11::2/96
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 30
#
interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 20
#
bgp 200
 router-id 10.2.2.2
 peer FC00:0:0:10::1 as-number 100
 peer FC00:0:0:11::1 as-number 200
 #
 ipv4-family unicast
  undo synchronization
 #
 ipv6-family unicast
  undo synchronization
  network FC00:0:0:10:: 96
  network FC00:0:0:11:: 96
  peer FC00:0:0:10::1 enable
  peer FC00:0:0:11::1 enable
#
return

SwitchC configuration file

#
sysname SwitchC
#
ipv6
#
vlan batch 30 40
#
interface Vlanif30
 ipv6 enable
 ipv6 address FC00:0:0:11::1/96
#
interface Vlanif40
 ipv6 enable
 ipv6 address FC00:0:0:12::1/96
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 40
#
interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 30
#
bgp 200
 router-id 10.3.3.3
 peer FC00:0:0:11::2 as-number 200
 peer FC00:0:0:12::2 as-number 200
 #
 ipv4-family unicast
  undo synchronization
 #
 ipv6-family unicast
  undo synchronization
  network FC00:0:0:11:: 96
  network FC00:0:0:12:: 96
  peer FC00:0:0:11::2 enable
  peer FC00:0:0:11::2 reflect-client
  peer FC00:0:0:12::2 enable
  peer FC00:0:0:12::2 reflect-client
#
return

SwitchD configuration file

#
sysname SwitchD
#
ipv6
#
vlan batch 40
#
interface Vlanif40
 ipv6 enable
 ipv6 address FC00:0:0:12::2/96
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 40
#
bgp 200
 router-id 10.4.4.4
 peer FC00:0:0:12::1 as-number 200
 #
 ipv4-family unicast
  undo synchronization
 #
 ipv6-family unicast
  undo synchronization
  network FC00:0:0:12:: 96
  peer FC00:0:0:12::1 enable
#
return