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Network Requirement

As shown in Figure. 1, BGP runs on all the switches.

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Configure an EBGP connection between Switch A and Switch B.

Configure Switch D as the route reflector for Switch B and Switch C, which is the clients of Switch D, to simplify device configuration and management.

You have to finish configurations on Switch D to be a route reflector. No configuration is required on the client.

 Figure 1. BGP Route Reflector Configuration


Procedure

This section describes the steps of how 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

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

Step3        Enable IP routing.

Code Block
admin@SwitchA# set protocols bgp peer 192.168.20.2 local-ip 192.168.20.1
admin@SwitchA# set protocols bgp peer 192.168.20.2 next-hop-selfrouting enable true

Step3  Step4         Commit the configurations.

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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

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Code Block
admin@SwitchB# set protocols bgp bgprouter-id 2.2.2.2
admin@SwitchB# set protocols bgp local-as 200
admin@SwitchB# set protocols bgp peerneighbor 192.168.20.1 remote-as 100
admin@SwitchB# set protocols bgp peerneighbor 192.168.20.1 local-ip 192.168.20.2
admin@SwitchB# set protocols bgp peer 192.168.20.1 next-hop-self true
admin@SwitchB# set protocols bgp peer 192.168.40.2 as 200
admin@SwitchB# set protocols bgp peer 192.168.40.2 local-ip 192.168.40.1
admin@SwitchB# set protocols bgp peer 192.168.40.2 next-hop-self true

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40.2 remote-as 200

Step3        Enable IP routing.

Code Block
admin@SwitchB# set ip routing enable true

Step4        Commit the configurations.

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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

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Code Block
admin@SwitchC# set protocols bgp bgprouter-id 3.3.3.3
admin@SwitchC# set protocols bgp local-as 200
admin@SwitchC# set protocols bgp peerneighbor 192.168.40.1 as 200
admin@SwitchC# set protocols bgp peer 192.168.40.1 local-ip 192.168.40.2
admin@SwitchC# set protocols bgp peer 192.168.40.1 next-hop-self true
admin@SwitchC# set protocols bgp peer 192.168.50.1 as 200
admin@SwitchC# set protocols bgp peer 192.168.50.1 local-ip 192.168.50.2
admin@SwitchC# set protocols bgp peer 192.168.50.1 next-hop-self true

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50.2 remote-as 200

Step3        Enable IP routing.

Code Block
admin@SwitchC# set protocolsip bgp route-reflector cluster-id 3.3.3.3
admin@SwitchC# set protocols bgp route-reflector disable false
admin@SwitchC# set protocols bgp peer 192.168.40.1 client true
admin@SwitchC# set protocols bgp peer 192.168.50.1 client truerouting enable true

Step4         Commit the configurations.

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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

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Code Block
admin@SwitchD# set protocols bgp bgprouter-id 4.4.4.4
admin@SwitchD# set protocols bgp local-as 200
admin@SwitchD# set protocols bgp peerneighbor 192.168.3040.1 remote-as 200
admin@SwitchD# set protocols bgp peerneighbor 192.168.3050.1 localremote-ip 192.168.30.2
as 200

Step3         Configure Switch D to be a route reflector for Switch B and  Switch C.

Code Block
admin@SwitchD# set protocols bgp peerneighbor 192.168.3040.1 ipv4-unicast nextroute-hopreflector-self trueclient
admin@SwitchD# set protocols bgp peerneighbor 192.168.5040.21 as 200
ipv4-unicast route-reflector-client

Step4        Enable IP routing.

Code Block
admin@SwitchD# set protocolsip bgprouting peer 192.168.50.2 local-ip enable true

Step5         Commit the configurations.

Code Block
admin@SwitchD# commit

Configuring Switch A to Advertise Route 192.168.

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10.0/24

Code Block
admin@SwitchA# set protocols bgp peeripv4-unicast network 192.168.5010.2 next-hop-self true

Step3         Commit the configurations.

Code Block
admin@SwitchD# 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