Table of Contents

Network Requirement

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

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Configure load balancing on Switch A.

Configure EBGP connections between Switch B and Switch A and between Switch B and Switch D.

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Configure

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EBGP connections between

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Switch C

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and Switch

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A and between Switch

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C and Switch

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D.

Figure 1. BGP configuration

Procedure

This section describes the steps of how to configure basic BGP functions on SwitchA, SwitchB, SwitchC and SwitchD.

Switch A

Step1 Configure the VLANs and VLAN interfaces.

Code Block

admin@SwitchA# set vlans vlan-id 1030 l3-interface 10vlan30
admin@SwitchA# set vlans vlan-id 2040 l3-interface 20vlan40
admin@SwitchA# set interface gigabit-ethernet tege-1/1/1 family ethernet-switching native-vlan-id 1030
admin@SwitchA# set interface gigabit-ethernet tege-1/1/2 family ethernet-switching native-vlan-id 2040
admin@SwitchA# set vlan-interface interface 10vlan30 vif 10vlan30 address 192.168.1030.1 prefix-length 24
admin@SwitchA# set vlan-interface interface 20vlan40 vif 20vlan40 address 192.168.2040.1 prefix-length 24

Step2 Configure an EBGP connection.

Code Block

admin@SwitchA# set protocols bgp bgp-id 1.1.1.1
admin@SwitchA# set protocols bgp local-as 100
admin@SwitchA# set protocols bgp peer 192.168.2030.2 as 200
admin@SwitchA# set protocols bgp peer 192.168.2030.2 local-ip 192.168.2030.1
admin@SwitchA# set protocols bgp peer 192.168.40.2 as 300
admin@SwitchA# set protocols bgp peer 192.168.2040.2 nextlocal-hop-self trueip 192.168.30.1

Step3 Commit the configurations.

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Step1 Configure the VLANs and VLAN interfaces.

Code Block

admin@SwitchB#admin@XorPlus# set vlans vlan-id 20 l3-interface 20vlan20
admin@SwitchB#admin@XorPlus# set vlans vlan-id 30 l3-interface 30vlan30
admin@SwitchB#admin@XorPlus# set vlans vlan-id 40 l3-interface 40
admin@SwitchB# set interface gigabit-ethernet ge-1/1/21 family ethernet-switching native-vlan-id 2030
admin@SwitchB#admin@XorPlus# set interface gigabit-ethernet ge-1/1/32 family ethernet-switching native-vlan-id 3020
admin@SwitchB#admin@XorPlus# set vlan-interface gigabit-ethernet ge-1/1/4 family ethernet-switching native-vlan-id 40
admin@SwitchB# set vlan-interface interface 20 vif 20 address interface vlan20 vif vlan20 address 192.168.20.2 prefix-length 24
admin@SwitchB#admin@XorPlus# set vlan-interface interface 30vlan30 vif 30vlan30 address 192.168.30.12 prefix-length 24
admin@SwitchB# set vlan-interface interface 40 vif 40 address 192.168.40.1 prefix-length 24

Step2 Configure EBGP and IBGP connections.

Code Block
admin@SwitchB# set protocols bgp bgp-id

Step2 Configure EBGP connections.

Code Block

admin@XorPlus# set protocols bgp bgp-id 2.2.2.2.2
admin@SwitchB#admin@XorPlus# set protocols bgp local-as 200
admin@SwitchB#admin@XorPlus# set protocols bgp peer 192.168.20.1 as 100400
admin@SwitchB#admin@XorPlus# set protocols bgp peer 192.168.20.1 local-ip 192.168.20.2
admin@SwitchB#admin@XorPlus# set protocols bgp peer 192.168.2030.1 next-hop-self true
admin@SwitchB# set protocols bgp peer 192.168.30.2 as 200
admin@SwitchB#as 100
admin@XorPlus# set protocols bgp peer 192.168.30.2 local-ip 192.168.30.1
admin@SwitchB# set protocols bgp peer 192.168.30.2 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

Step3 Commit the configurations.

Code Block
admin@SwitchB# commit

Switch C

Step1 Configure the VLANs and VLAN interfaces.

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 vlan-interface interface 40 vif 40 address 192.168.402

Step3 Commit the configurations.

Code Block
admin@SwitchB# commit

Switch C

Step1 Configure the VLANs and VLAN interfaces.

Code Block

admin@XorPlus# set vlans vlan-id 40 l3-interface 40
admin@XorPlus# set vlans vlan-id 50 l3-interface 50
admin@XorPlus# set interface gigabit-ethernet ge-1/1/2 family ethernet-switching native-vlan-id 40
admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 family ethernet-switching native-vlan-id 50
admin@XorPlus# set vlan-interface interface vlan40 vif vlan40 address 192.168.40.2 prefix-length 24
admin@XorPlus# set vlan-interface interface vlan50 vif vlan50 address 192.168.50.2 prefix-length 24
admin@SwitchC# set vlan-interface interface 50 vif 50 address 192.168.50.2 prefix-length 24

Step2 Configure the IBGP connection.

Code Block
admin@SwitchC# set protocols

Step2 Configure the EBGP connection.

Code Block

admin@XorPlus# set protocols bgp bgp-id 3.3.3.3
admin@SwitchC#admin@XorPlus# set protocols bgp local-as 200300
admin@SwitchC#admin@XorPlus# set protocols bgp peer 192.168.40.1 as 200100
admin@SwitchC#admin@XorPlus# set protocols bgp peer 192.168.40.1 local-ip 192.168.40.2
admin@SwitchC#admin@XorPlus# set protocols bgp peer 192.168.4050.1 next-hop-self true
admin@SwitchC# set protocols bgp peer 192.168.50.1 as 200
admin@SwitchC#as 400
admin@XorPlus# 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

Step3 Commit the configurations.

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Step1 Configure the VLANs and VLAN interfaces.

Code Block

admin@SwitchD#admin@XorPlus# set vlans vlan-id 3010 l3-interface vlan10
admin@XorPlus# set vlans vlan-id 20 l3-interface 30vlan20
admin@SwitchD#admin@XorPlus# set vlans vlan-id 50 l3-interface 50
admin@SwitchD# vlan50
admin@XorPlus# commit
Waiting for merging configuration.
Commit OK.
Save done.
admin@XorPlus# set interface gigabit-ethernet ge-1/1/31 family ethernet-switching native-vlan-id 3010
admin@SwitchD#admin@XorPlus# set interface gigabit-ethernet ge-1/1/52 family ethernet-switching native-vlan-id 20
admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 family ethernet-switching native-vlan-id 50
admin@SwitchD#admin@XorPlus# set vlan-interface interface 30vlan10 vif 40vlan10 address 192.168.3010.21 prefix-length 24
admin@SwitchD#admin@XorPlus# set vlan-interface interface 50vlan20 vif 50vlan20 address 192.168.5020.1 prefix-length 24

...


admin@XorPlus# set vlan-interface interface vlan50 vif vlan50 address 192.168.50.1 prefix-length 24

Step2 Configure the EBGP connection.

Code Block

admin@SwitchD#admin@XorPlus# set protocols bgp bgp-id 4.4.4.4
admin@SwitchD#admin@XorPlus# set protocols bgp local-as 200400
admin@SwitchD#admin@XorPlus# set protocols bgp peer 192.168.3020.12 as 200
admin@SwitchD#admin@XorPlus# set protocols bgp peer 192.168.3020.12 local-ip 192.168.3020.21
admin@SwitchD#admin@XorPlus# set protocols bgp peer 192.168.30.1 next-hop-self true
admin@SwitchD# set protocols bgp peer 192.168.50.50.2 as 200300
admin@SwitchD#admin@XorPlus# set protocols bgp peer 192.168.50.2 local-ip 192.168.50.1
admin@SwitchD# set protocols bgp peer 192.168.50.2 next-hop-self true

Step3 Commit the configurations.

Code Block
admin@SwitchD# commit

Viewing BGP Peer Status on Switch B

Code Block

admin@SwitchB#admin@XorPlus# run show bgp peers detail 
Peer 2: local 192.168.20.2/179 remote 192.168.20.1/17939912
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 192.168.30.12/17916808 remote 192.168.30.21/179
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

Viewing BGP Peer Status on Switch C

Code Block

admin@XorPlus# run show bgp peers detail 
Peer 32: local 192.168.40.12/179 remote 192.168.40.21/17938815
Peer ID: 31.31.31.31
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

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Peer 2: local 192.168.

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50.

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Code Block

admin@SwitchA# set policy policy-statement direct-to-bgp term t1 from protocol connected 
admin@SwitchA# set policy policy-statement direct-to-bgp term t1 from network4 192.168.10.0/24
admin@SwitchA# set policy policy-statement direct-to-bgp term t1 then accept 
admin@SwitchA# set protocols bgp export direct-to-bgp
admin@SwitchA# commit

...

Code Block

admin@SwitchD# 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@SwitchD#

...

Code Block

admin@SwitchD# run show bgp routes 
Status Codes: * valid route, > best route
Origin Codes: i IGP, e EGP, ? incomplete 
Prefix Nexthop Peer AS Path
------ ------- ---- -------2/49923 remote 192.168.50.1/179
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

Configuring Switch D to Advertise Route 192.168.10.0/24

Configure Switch A to enable BGP multipath:

Code Block
admin@XorPlus# set protocols bgp multipath disable false

Configure Switch D to advertise route 192.168.10.0/24:

Code Block

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
192.168.20.1 2.2.2.2 100 ?
admin@SwitchD#

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

Code Block

admin@SwitchB# set policy policy-statement direct-to-bgp term t1 from protocol connected 
admin@SwitchB# set policy policy-statement direct-to-bgp term t1 then accept 
admin@SwitchB# set protocols bgp export direct-to-bgp
admin@SwitchB# commit

Ping 192.168.10.1 on Switch C:

Code Block
admin@SwitchC# run pingadmin@XorPlus# set policy policy-statement direct-to-bgp term t1 then accept admin@XorPlus# set protocols bgp export direct-to-bgp

View the BGP routing table of Switch A:

Code Block

admin@XorPlus# run show bgp routes
Status Codes: * valid route, > best route
Origin Codes: i IGP, e EGP, ? incomplete
Prefix Nexthop Peer AS Path
------ ------- ---- -------
*> 192.168.10.10/24 PING 192.168.1030.12 (1922.1682.102.1) 56(84) bytes of data.
64 bytes from 2 200 400 ?
192.168.10.1: icmp_req=1 ttl=63 time=4.68 ms
64 bytes from 0/24 192.168.10.1: 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

View the BGP routing table of Switch C:

Code Block
admin@SwitchC#40.2 3.3.3.3 200 400 ? admin@XorPlus#

As expected, Switch A is not load balancing because it does not view the paths as "equal," but as different AS paths.

Configuring BGP Multipath Path-Relax on Switch A

增加描述Multipath Path-Relax。

Code Block
admin@XorPlus# set protocols bgp multipath path-relax true admin@XorPlus# commit Waiting for merging configuration. Commit OK. Save done. admin@XorPlus#

View the BGP routing table and IP routing table of Switch A:

Code Block

admin@XorPlus# run show bgp routes 
Status Codes: * valid route, > best route
Origin Codes: i IGP, e EGP, ? incomplete 
Prefix Nexthop Peer AS Path
------ ------- ---- ----------
*> 192.168.10.0/24 192.168.30.2 2.2.2.2 200 400 ?
*> 192.168.10.0/24 192.168.2040.12 23.23.23.23 200 100400 ?
*>
admin@XorPlus# 
admin@XorPlus# run show route table ipv4 unicast ebgp 
192.168.20.0/2410.0/24 [ebgp(20)/0]
> to 192.168.4030.1 2.2.2.2?
*>1922 via vlan30/vlan30
192.168.3010.0/24 [ebgp(20)/0]
> to 192.168.40.1 2.2.2.2?2 via vlan40/vlan40
admin@XorPlus# 
admin@XorPlus#

Version	Old Version 1	New Version 2
Changes made by	Tracy Yang	Tracy Yang
Saved on	Mar 31, 2021	Mar 31, 2021

Versions Compared

Key

Network Requirement

Procedure

Switch A

Switch C

Switch C

Viewing BGP Peer Status on Switch B

Viewing BGP Peer Status on Switch C

Configuring Switch D to Advertise Route 192.168.10.0/24

Configuring Switch B to Advertise a Connected Route

Configuring BGP Multipath Path-Relax on Switch A

Page Comparison

Versions Compared

Key

Network Requirement

Procedure

Switch A

Switch C

Switch C

Viewing BGP Peer Status on Switch B

Viewing BGP Peer Status on Switch C

Configuring Switch D to Advertise Route 192.168.10.0/24

Configuring Switch B to Advertise a Connected Route

Configuring BGP Multipath Path-Relax on Switch A