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Configuration Example

As shown in Fig. 5-9, BGP runs between switches.

An EBGP connection is established between Switch A and Switch B, and IBGP fullmesh connections are established between Switch B, Switch C, and Switch D. 

Configure IBGP connections between Switch B, Switch C, and Switch D.

Configure an EBGP connection between Switch A and Switch B.

 Figure 5-9. BGP configuration



                           


Configuring Switch A

Configure the VLAN that each interface belongs to.

admin@XorPlus# set vlans vlan-id 10 l3-interface 10
admin@XorPlus# set vlans vlan-id 20 l3-interface 20
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus#
admin@XorPlus# set interface gigabit-ethernet ge-1/1/1 family ethernet-switching native-vlan-id 10
admin@XorPlus# set interface gigabit-ethernet ge-1/1/2 family ethernet-switching native-vlan-id 20
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configure the VLAN interfaces, and assign them IP addresses.

admin@XorPlus# set vlan-interface interface 10 vif 10 address 192.168.10.1 prefix-length 24
admin@XorPlus# set vlan-interface interface 20 vif 20 address 192.168.20.1 prefix-length 24
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configure an EBGP connection.

admin@XorPlus# set protocols bgp bgp-id 1.1.1.1
admin@XorPlus# set protocols bgp local-as 100
admin@XorPlus# set protocols bgp peer 192.168.20.2 as 200
admin@XorPlus# set protocols bgp peer 192.168.20.2 local-ip 192.168.20.1
admin@XorPlus# set protocols bgp peer 192.168.20.2 next-hop-self true
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configuring Switch B

Configure the VLAN that each interface belongs to.

admin@XorPlus# set vlans vlan-id 20 l3-interface 20
admin@XorPlus# set vlans vlan-id 30 l3-interface 30
admin@XorPlus# set vlans vlan-id 40 l3-interface 40
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus#
admin@XorPlus# set interface gigabit-ethernet ge-1/1/2 family ethernet-switching native-vlan-id 20
admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 family ethernet-switching native-vlan-id 30
admin@XorPlus# set interface gigabit-ethernet ge-1/1/4 family ethernet-switching native-vlan-id 40
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configure the VLAN interfaces and assign them IP addresses.

admin@XorPlus# set vlan-interface interface 20 vif 20 address 192.168.20.2 prefix-length 24
admin@XorPlus# set vlan-interface interface 30 vif 30 address 192.168.30.1 prefix-length 24
admin@XorPlus# set vlan-interface interface 40 vif 40 address 192.168.40.1 prefix-length 24
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configure EBGP and IBGP connections.

admin@XorPlus# set protocols bgp bgp-id 2.2.2.2
admin@XorPlus# set protocols bgp local-as 200
admin@XorPlus# set protocols bgp peer 192.168.20.1 as 100
admin@XorPlus# set protocols bgp peer 192.168.20.1 local-ip 192.168.20.2
admin@XorPlus# set protocols bgp peer 192.168.20.1 next-hop-self true
admin@XorPlus# set protocols bgp peer 192.168.30.2 as 200
admin@XorPlus# set protocols bgp peer 192.168.30.2 local-ip 192.168.30.1
admin@XorPlus# set protocols bgp peer 192.168.30.2 next-hop-self true
admin@XorPlus# set protocols bgp peer 192.168.40.2 as 200
admin@XorPlus# set protocols bgp peer 192.168.40.2 local-ip 192.168.40.1
admin@XorPlus# set protocols bgp peer 192.168.40.2 next-hop-self true
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configuring Switch C

Configure the VLAN that each interface belongs to.

admin@XorPlus# set vlans vlan-id 40 l3-interface 40
admin@XorPlus# set vlans vlan-id 50 l3-interface 50
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# set interface gigabit-ethernet ge-1/1/4 family ethernet-switching native-vlan-id 40
admin@XorPlus# set interface gigabit-ethernet ge-1/1/5 family ethernet-switching native-vlan-id 50
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configure the VLAN interfaces, and assign them IP addresses.

admin@XorPlus# set vlan-interface interface 40 vif 40 address 192.168.40.2 prefix-length 24
admin@XorPlus# set vlan-interface interface 50 vif 50 address 192.168.50.2 prefix-length 24
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configure an IBGP connection.

admin@XorPlus# set protocols bgp bgp-id 3.3.3.3
admin@XorPlus# set protocols bgp local-as 200
admin@XorPlus# set protocols bgp peer 192.168.40.1 as 200
admin@XorPlus# set protocols bgp peer 192.168.40.1 local-ip 192.168.40.2
admin@XorPlus# set protocols bgp peer 192.168.40.1 next-hop-self true
admin@XorPlus# set protocols bgp peer 192.168.50.1 as 200
admin@XorPlus# set protocols bgp peer 192.168.50.1 local-ip 192.168.50.2
admin@XorPlus# set protocols bgp peer 192.168.50.1 next-hop-self true
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configuring Switch D

Configure the VLAN that each interface belongs to.

admin@XorPlus# set vlans vlan-id 30 l3-interface 30
admin@XorPlus# set vlans vlan-id 50 l3-interface 50
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 family ethernet-switching native-vlan-id 30
admin@XorPlus# set interface gigabit-ethernet ge-1/1/5 family ethernet-switching native-vlan-id 50
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configure the VLAN interfaces, and assign them IP addresses.

admin@XorPlus# set vlan-interface interface 30 vif 40 address 192.168.30.2 prefix-length 24
admin@XorPlus# set vlan-interface interface 50 vif 50 address 192.168.50.1 prefix-length 24
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Configure an IBGP connection.

admin@XorPlus# set protocols bgp bgp-id 4.4.4.4
admin@XorPlus# set protocols bgp local-as 200
admin@XorPlus# set protocols bgp peer 192.168.30.1 as 200
admin@XorPlus# set protocols bgp peer 192.168.30.1 local-ip 192.168.30.2
admin@XorPlus# set protocols bgp peer 192.168.30.1 next-hop-self true
admin@XorPlus# set protocols bgp peer 192.168.50.2 as 200
admin@XorPlus# set protocols bgp peer 192.168.50.2 local-ip 192.168.50.1
admin@XorPlus# set protocols bgp peer 192.168.50.2 next-hop-self true
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


Viewing BGP Peer Status on Switch B

admin@XorPlus# run show bgp peers detail 
Peer 2: local 192.168.20.2/179 remote 192.168.20.1/179
Peer ID: 1.1.1.1
Peer State: ESTABLISHED
Admin State: START
Negotiated BGP Version: 4
Peer AS Number: 100
Updates Received: 20, Updates Sent: 2
Messages Received: 634, Messages Sent: 611
Time since last received update: 1685 seconds
Number of transitions to ESTABLISHED: 1
Time since last entering ESTABLISHED state: 15995 seconds
Retry Interval: 120 seconds
Hold Time: 90 seconds, Keep Alive Time: 30 seconds
Configured Hold Time: 90 seconds, Configured Keep Alive Time: 30 seconds
Minimum AS Origination Interval: 0 seconds
Minimum Route Advertisement Interval: 0 seconds 
Peer 2: local 192.168.30.1/179 remote 192.168.30.2/179
Peer ID: 4.4.4.4
Peer State: ESTABLISHED
Admin State: START
Negotiated BGP Version: 4
Peer AS Number: 100
Updates Received: 20, Updates Sent: 2
Messages Received: 634, Messages Sent: 611
Time since last received update: 1685 seconds
Number of transitions to ESTABLISHED: 1
Time since last entering ESTABLISHED state: 15995 seconds
Retry Interval: 120 seconds
Hold Time: 90 seconds, Keep Alive Time: 30 seconds
Configured Hold Time: 90 seconds, Configured Keep Alive Time: 30 seconds
Minimum AS Origination Interval: 0 seconds
Minimum Route Advertisement Interval: 0 seconds 
Peer 3: local 192.168.40.1/179 remote 192.168.40.2/179
Peer ID: 3.3.3.3
Peer State: ESTABLISHED
Admin State: START
Negotiated BGP Version: 4
Peer AS Number: 100
Updates Received: 20, Updates Sent: 2
Messages Received: 634, Messages Sent: 611
Time since last received update: 1685 seconds
Number of transitions to ESTABLISHED: 1
Time since last entering ESTABLISHED state: 15995 seconds
Retry Interval: 120 seconds
Hold Time: 90 seconds, Keep Alive Time: 30 seconds
Configured Hold Time: 90 seconds, Configured Keep Alive Time: 30 seconds
Minimum AS Origination Interval: 0 seconds
Minimum Route Advertisement Interval: 0 seconds
admin@XorPlus# 


Configuring Switch A to Advertise Route 192.168.10.0/24

admin@XorPlus# set policy policy-statement direct-to-bgp term t1 from protocol connected 
admin@XorPlus# set policy policy-statement direct-to-bgp term t1 from network4 192.168.10.0/24
admin@XorPlus# set policy policy-statement direct-to-bgp term t1 then accept 
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus#
admin@XorPlus# set protocols bgp export direct-to-bgp
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 


View the BGP routing table of Switch B:

admin@XorPlus# run show bgp routes 
Status Codes: * valid route, > best route
Origin Codes: i IGP, e EGP, ? incomplete 
Prefix Nexthop Peer AS Path
------ ------- ---- -------
*> 192.168.10.0/24 192.168.20.1 1.1.1.1 100 ?
admin@XorPlus# 


View the BGP routing table of Switch C:

admin@XorPlus# run show bgp routes 
Status Codes: * valid route, > best route
Origin Codes: i IGP, e EGP, ? incomplete 
Prefix Nexthop Peer AS Path
------ ------- ---- -------
192.168.10.0/24 192.168.20.1 2.2.2.2 100 ?
admin@XorPlus# 

The preceding command output display that the route to destination 192.168.10.0/24 becomes invalid because the next hop address of this route is unreachable. 


Configuring Switch B to Advertise a Connected Route

admin@XorPlus# set policy policy-statement direct-to-bgp term t1 from protocol connected 
admin@XorPlus# set policy policy-statement direct-to-bgp term t1 then accept 
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus#
admin@XorPlus# set protocols bgp export direct-to-bgp
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# 

Ping 192.168.10.1 on Switch C:

admin@XorPlus# run ping 192.168.10.1
PING 192.168.10.1 (192.168.10.1) 56(84) bytes of data.
64 bytes from 192.168.10.1: icmp_req=1 ttl=63 time=4.68 ms
64 bytes from 192.168.10.1: icmp_req=2 ttl=63 time=4.46 ms
64 bytes from 192.168.10.1: icmp_req=3 ttl=63 time=5.35 ms
64 bytes from 192.168.10.1: icmp_req=4 ttl=63 time=4.52 ms
64 bytes from 192.168.10.1: icmp_req=5 ttl=63 time=4.51 ms 
192.168.10.1 ping statistics —
5 packets transmitted, 5 received, 0% packet loss, time 4017ms
rtt min/avg/max/mdev = 4.460/4.709/5.358/0.338 ms
admin@XorPlus#

View the BGP routing table of Switch C:

admin@XorPlus# run show bgp routes 
Status Codes: * valid route, > best route
Origin Codes: i IGP, e EGP, ? incomplete 
Prefix Nexthop Peer AS Path
------ ------- ---- -------
192.168.10.0/24 192.168.20.1 2.2.2.2 100 ?
*> 192.168.20.0/24 192.168.40.1 2.2.2.2?
*>192.168.30.0/24 192.168.40.1 2.2.2.2?
admin@XorPlus# 
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