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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.
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admin@SwitchA# set vlans vlan-id 10 l3-interface 10vlan10 admin@SwitchA# set vlans vlan-id 20 l3-interface 20vlan20 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 l3-interface vlan-interface 10vlan10 address 192.168.10.1 prefix-length 24 admin@SwitchA# set l3-interface vlan-interface 20vlan20 address 192.168.20.1 prefix-length 24 |
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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
admin@SwitchA# set protocols bgp ebgp-requires-policy false |
Step3 Enable IP routing.
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admin@SwitchB# set vlans vlan-id 20 l3-interface 20vlan20 admin@SwitchB# set vlans vlan-id 30 l3-interface 30vlan30 admin@SwitchB# set vlans vlan-id 40 l3-interface 40vlan40 admin@SwitchB# set interface gigabit-ethernet te-1/1/2 family ethernet-switching native-vlan-id 20 admin@SwitchB# set interface gigabit-ethernet te-1/1/3 family ethernet-switching native-vlan-id 30 admin@SwitchB# set interface gigabit-ethernet te-1/1/4 family ethernet-switching native-vlan-id 40 admin@SwitchB# set l3-interface vlan-interface 20vlan20 address 192.168.20.2 prefix-length 24 admin@SwitchB# set l3-interface vlan-interface 30vlan30 address 192.168.30.1 prefix-length 24 admin@SwitchB# set l3-interface vlan-interface 40vlan40 address 192.168.40.1 prefix-length 24 |
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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 192.168.30.2 remote-as 200
admin@SwitchB# set protocols bgp neighbor 192.168.40.2 remote-as 200
admin@SwitchB# set protocols bgp ebgp-requires-policy false |
Step3 Enable IP routing.
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admin@SwitchC# set vlans vlan-id 4030 l3-interface 40vlan30 admin@SwitchC# set vlans vlan-id 50 l3-interface 50vlan50 admin@SwitchC# set interface gigabit-ethernet te-1/1/4 family ethernet-switching native-vlan-id 4030 admin@SwitchC# set interface gigabit-ethernet te-1/1/5 family ethernet-switching native-vlan-id 50 admin@SwitchC# set l3-interface vlan-interface 40vlan30 address 192.168.30.2 prefix-length 24 admin@SwitchC# set l3-interface vlan-interface 50vlan50 address 192.168.50.1 prefix-length 24 |
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admin@SwitchD# set vlans vlan-id 3040 l3-interface 30vlan40 admin@SwitchD# set vlans vlan-id 50 l3-interface 50vlan50 admin@SwitchD# set interface gigabit-ethernet te-1/1/34 family ethernet-switching native-vlan-id 3040 admin@SwitchD# set interface gigabit-ethernet te-1/1/5 family ethernet-switching native-vlan-id 50 admin@SwitchD# set l3-interface vlan-interface 40vlan40 address 192.168.40.2 prefix-length 24 admin@SwitchD# set l3-interface vlan-interface 50vlan50 address 192.168.50.2 prefix-length 24 |
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admin@SwitchD# commit |
Viewing BGP Peer Status on Switch B
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admin@SwitchB# run show bgp neighbor
BGP neighbor on vlan20: 192.168.20.1, remote AS 100, local AS 200, external link
BGP version 4, remote router ID 1.1.1.1, local router ID 2.2.2.2
BGP state = Idle
Last read 00:15:06, Last write never
Hold time is 180, keepalive interval is 60 seconds
Graceful restart information:
Local GR Mode: Helper*
Remote GR Mode: NotApplicable
R bit: False
Timers:
Configured Restart Time(sec): 120
Received Restart Time(sec): 0
Message statistics:
Inq depth is 0
Outq depth is 0
Sent Rcvd
Opens: 0 0
Notifications: 0 0
Updates: 0 0
Keepalives: 0 0
Route Refresh: 0 0
Capability: 0 0
Total: 0 0
Minimum time between advertisement runs is 0 seconds
For address family: IPv4 Unicast
Not part of any update group
Community attribute sent to this neighbor(all)
0 accepted prefixes
Connections established 0; dropped 0
Last reset 00:15:06, Waiting for Peer IPv6 LLA
BGP Connect Retry Timer in Seconds: 120
Read thread: off Write thread: off FD used: -1
BGP neighbor is 192.168.30.2, remote AS 200, local AS 200, internal link
Administratively shut down
BGP version 4, remote router ID 3.3.3.3, local router ID 2.2.2.2
BGP state = Idle
Last read 00:15:06, Last write never
Hold time is 180, keepalive interval is 60 seconds
Graceful restart information:
Local GR Mode: Helper*
Remote GR Mode: NotApplicable
R bit: False
Timers:
Configured Restart Time(sec): 120
Received Restart Time(sec): 0
Message statistics:
Inq depth is 0
Outq depth is 0
Sent Rcvd
Opens: 0 0
Notifications: 0 0
Updates: 0 0
Keepalives: 0 0
Route Refresh: 0 0
Capability: 0 0
Total: 0 0
Minimum time between advertisement runs is 600 seconds
For address family: IPv4 Unicast
Not part of any update group
Advertise bestpath per AS via addpath
Override ASNs in outbound updates if aspath equals remote-as
Community attribute sent to this neighbor(all)
0 accepted prefixes
Connections established 0; dropped 0
Last reset 00:15:06, No AFI/SAFI activated for peer
External BGP neighbor may be up to 255 hops away.
BGP Connect Retry Timer in Seconds: 111
Peer Authentication Enabled
Read thread: off Write thread: off FD used: -1
BGP neighbor is 192.168.40.2, remote AS 200, local AS 200, internal link
BGP version 4, remote router ID 4.4.4.4, local router ID 2.2.2.2
BGP state = Active
Last read 00:15:06, Last write never
Hold time is 180, keepalive interval is 60 seconds
Graceful restart information:
Local GR Mode: Helper*
Remote GR Mode: NotApplicable
R bit: False
Timers:
Configured Restart Time(sec): 120
Received Restart Time(sec): 0
Message statistics:
Inq depth is 0
Outq depth is 0
Sent Rcvd
Opens: 0 0
Notifications: 0 0
Updates: 0 0
Keepalives: 0 0
Route Refresh: 0 0
Capability: 0 0
Total: 0 0
Minimum time between advertisement runs is 0 seconds
For address family: IPv4 Unicast
Not part of any update group
Advertise bestpath per AS via addpath
Override ASNs in outbound updates if aspath equals remote-as
Community attribute sent to this neighbor(all)
0 accepted prefixes
Connections established 0; dropped 0
Last reset 00:15:06, No AFI/SAFI activated for peer
External BGP neighbor may be up to 255 hops away.
BGP Connect Retry Timer in Seconds: 111
Peer Authentication Enabled
Read thread: off Write thread: off FD used: -1 |
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