Aggregate-Address As-Set

Scenario to verify BGP aggregate-address as-set configuration. The as-set option generates AS_SET path information for the aggregate route, preserving the AS path information from the contributing routes. This is useful for loop prevention when aggregating routes from multiple AS sources.

Test BGP Aggregate Address As-Set eBGP

Description

Test BGP aggregate-address as-set with eBGP. DUT0 (AS 10) receives route 192.168.1.0/24 from DUT1 (AS 20) and has local route 192.168.2.0/24. It aggregates both into 192.168.0.0/16 with as-set and announces to DUT2 (AS 30). With as-set, DUT2 sees AS_SET {20} in the path, preserving the origin AS information for loop prevention.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces dummy dum0 address 192.168.2.1/24
set interfaces ethernet eth0 address 10.1.1.100/24
set interfaces ethernet eth1 address 10.2.2.100/24
set protocols bgp 10 aggregate-address 192.168.0.0/16 as-set
set protocols bgp 10 neighbor DUT1 remote-address 10.1.1.1
set protocols bgp 10 neighbor DUT1 remote-as 20
set protocols bgp 10 neighbor DUT1 route-map import PERMIT
set protocols bgp 10 neighbor DUT2 remote-address 10.2.2.2
set protocols bgp 10 neighbor DUT2 remote-as 30
set protocols bgp 10 neighbor DUT2 route-map export PERMIT
set protocols bgp 10 redistribute connected
set protocols route-map PERMIT rule 1 action permit
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 2: Set the following configuration in DUT1 :

set interfaces dummy dum0 address 192.168.1.1/24
set interfaces ethernet eth0 address 10.1.1.1/24
set protocols bgp 20 neighbor DUT0 remote-address 10.1.1.100
set protocols bgp 20 neighbor DUT0 remote-as 10
set protocols bgp 20 neighbor DUT0 route-map export PERMIT
set protocols bgp 20 redistribute connected
set protocols route-map PERMIT rule 1 action permit
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Set the following configuration in DUT2 :

set interfaces ethernet eth1 address 10.2.2.2/24
set protocols bgp 30 neighbor DUT0 remote-address 10.2.2.100
set protocols bgp 30 neighbor DUT0 remote-as 10
set protocols bgp 30 neighbor DUT0 route-map import PERMIT
set protocols route-map PERMIT rule 1 action permit
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Attention

Verify BGP sessions are established

Step 4: Run command protocols bgp show ip summary at DUT0 and check if output matches the following regular expressions:

10.1.1.1.*Established[\s\S]+10.2.2.2.*Established

Attention

Verify that DUT0 receives route 192.168.1.0/24 from DUT1 (AS 20)

Step 5: Run command protocols bgp show ip at DUT0 and check if output matches the following regular expressions:

[*].+192.168.1.0/24\s+10.1.1.1.+20\s+\?

Attention

Verify that DUT0 has the aggregate route 192.168.0.0/16 with AS_SET containing AS 20

Step 6: Run command protocols bgp show ip at DUT0 and check if output matches the following regular expressions:

[*].+192.168.0.0/16.+\{20\}\s+\?

Attention

Verify that DUT2 receives the aggregate route with AS 10 and AS_SET {20}

Step 7: Run command protocols bgp show ip at DUT2 and check if output matches the following regular expressions:

[*].+192.168.0.0/16\s+10.2.2.100.+10\s+\{20\}\s+\?