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 Figure 1. BGP Route Reflector Configuration


Procedure

This section describes the steps to configure basic BGP functions on SwitchA, SwitchB, SwitchC and SwitchD, configure Switch D as the route reflector for Switch B and Switch C.

Switch A

Step1         Configure the VLANs and VLAN interfaces.

Code Block
admin@SwitchA# set vlans vlan-id 10 l3-interface 10
admin@SwitchA# set vlans vlan-id 20 l3-interface 20
admin@SwitchA# set interface gigabit-ethernet te-1/1/1 family ethernet-switching native-vlan-id 10
admin@SwitchA# set interface gigabit-ethernet te-1/1/2 family ethernet-switching native-vlan-id 20
admin@SwitchA# set vlanl3-interface vlan-interface 10 vif 10 address 192.168.10.1 prefix-length 24
admin@SwitchA# set vlanl3-interface vlan-interface 20 vif 20 address 192.168.20.1 prefix-length 24

...

Code Block
admin@SwitchA# set protocols bgp router-id 1.1.1.1
admin@SwitchA# set protocols bgp local-as 100
admin@SwitchA# set protocols bgp neighbor 192.168.20.2 remote-as 200

...

Step3        Enable IP routing.

Code Block
admin@SwitchA# set ip routing enable true

Step4         Commit the configurations.

...

Code Block
admin@SwitchB# set vlans vlan-id 20 l3-interface 20
admin@SwitchB# set vlans vlan-id 30 l3-interface 30
admin@SwitchB# set vlans vlan-id 40 l3-interface 40
admin@SwitchB# set interface gigabit-ethernet ge-1/1/2 family ethernet-switching native-vlan-id 20
admin@SwitchB# set interface gigabit-ethernet ge-1/1/3 family ethernet-switching native-vlan-id 30
admin@SwitchB# set interface gigabit-ethernet ge-1/1/4 family ethernet-switching native-vlan-id 40
admin@SwitchB# set vlanl3-interface vlan-interface 20 vif 20 address 192.168.20.2 prefix-length 24
admin@SwitchB# set vlanl3-interface vlan-interface 30 vif 30 address 192.168.30.1 prefix-length 24
admin@SwitchB# set vlanl3-interface vlan-interface 40 vif 40 address 192.168.40.1 prefix-length 24

...

Code Block
admin@SwitchB# set protocols bgp router-id 2.2.2.2
admin@SwitchB# set protocols bgp local-as 200
admin@SwitchB# set protocols bgp neighbor 192.168.20.1 remote-as 100
admin@SwitchB# set protocols bgp neighbor 192.168.40.2 remote-as 200

...

Step3        Enable IP routing.
 Code Block
admin@SwitchB# set ip routing enable true
Step4        Commit the configurations.
...
 Code Block
admin@SwitchC# set vlans vlan-id 40 l3-interface 40
admin@SwitchC# set vlans vlan-id 50 l3-interface 50
admin@SwitchC# set interface gigabit-ethernet ge-1/1/4 family ethernet-switching native-vlan-id 40
admin@SwitchC# set interface gigabit-ethernet ge-1/1/5 family ethernet-switching native-vlan-id 50
admin@SwitchC# set vlanl3-interface vlan-interface 40 vif 40 address 192.168.40.2 prefix-length 24
admin@SwitchC# set vlanl3-interface vlan-interface 50 vif 50 address 192.168.50.2 prefix-length 24
...
 Code Block
admin@SwitchC# set protocols bgp router-id 3.3.3.3
admin@SwitchC# set protocols bgp local-as 200
admin@SwitchC# set protocols bgp neighbor 192.168.50.2 remote-as 200
...
Step3        Enable IP routing.
 Code Block
admin@SwitchC# set ip routing enable true
Step4         Commit the configurations.
...
 Code Block
admin@SwitchD# set vlans vlan-id 30 l3-interface 30
admin@SwitchD# set vlans vlan-id 50 l3-interface 50
admin@SwitchD# set interface gigabit-ethernet ge-1/1/3 family ethernet-switching native-vlan-id 30
admin@SwitchD# set interface gigabit-ethernet ge-1/1/5 family ethernet-switching native-vlan-id 50
admin@SwitchD# set vlanl3-interface vlan-interface 30 vif 40 address 192.168.30.2 prefix-length 24
admin@SwitchD# set vlanl3-interface vlan-interface 50 vif 50 address 192.168.50.1 prefix-length 24
...
 Code Block
admin@SwitchD# set protocols bgp ipv4 unicast neighbor 192.168.40.1 ipv4-unicast route-reflector-client
admin@SwitchD# set protocols bgp ipv4 unicast neighbor 192.168.5040.1 ipv4-unicast route-reflector-client
...
Step4        Enable IP routing.
 Code Block
admin@SwitchD# set ip routing enable true
Step5         Commit the configurations.
 Code Block
admin@SwitchD# commit
Configuring Switch A to Advertise Route 192.168.10.0/24
 Code Block
admin@SwitchA# set protocols bgp ipv4-unicast network 192.168.10.0/24
admin@SwitchA# commit
Verify the Configurations
  • View the BGP routing table of Switch BD.
 Code Block
admin@SwitchB#admin@SwitchD# run show bgp routes
Status Codes: * valid route, > best route
Origin Codes: i IGP, e EGP, ? incomplete
Prefix Nexthop Peer AS Path
------ ------- ---- -------
*>route 192.168.10.0/24
BGP routing table entry for 192.168.10.0/24
Paths: (1 available, best #1, table default)
  Advertised to non peer-group peers:
  192.168.1050.0/24 192.168.20.11.1.1.1200 ?
  • View the BGP routing table of Switch D.
 Code Block
admin@SwitchB# run show bgp routes detail2
  200
    192.168.10.0/24 From peer: 3.3.3.3
Route: Not Used
Origin: INCOMPLETE
AS Path: 200
Nexthop: 192.168.40.1
Multiple Exit Discriminator: 0
Local Preference: 100
Originator ID: 2.2.2.2
Cluster List: 3.3.3.3from 192.168.20.1 (2.2.2.2)
      Origin IGP, metric 0, valid, external, best (First path received)
      Last update: Wed Apr  7 16:13:35 2021