04-07-2009 10:35 AM - edited 03-04-2019 04:16 AM
Folks, can you clarify what the "aggregate-address <> summary" could do in this case? I already read the documentation but it is not clear to me.
(...)
ip prefix-list My_Prefix seq 65 permit 12.30.0.0/18 le 32
ip prefix-list My_Prefix seq 100 deny 0.0.0.0/0 le 32
!
route-map PROJ1_OSPF100_REDISTR permit 10
description limit NEWDEVICE advertisement
match ip address prefix-list My_Prefix
!
router bgp 80342
address-family ipv4 vrf PROJ1
no redistribute ospf 100 vrf PROJ1
redistribute ospf 100 vrf PROJ1 route-map PROJ1_OSPF100_REDISTR
aggregate-address 12.30.0.0 255.255.192.0 summary-only
exit
!
End
(...)
Solved! Go to Solution.
04-07-2009 10:48 AM
Hello Marlon,
the aggregate-address creates a summarized route 12.30.0.0 with mask 255.255.192.0 and it will suppress the component routes (summary-only)
The summary route is created if at least a component route exists in the BGP table.
In your case this can be the result of redistribution of OSPF into BGP
As you can see prefixes within 12.30.0.0/18 are accepted in the route-map used to redistribute OSPF routes into BGP (prefix-list)
Hope to help
Giuseppe
04-07-2009 10:44 AM
Ah, this article made me understand this! Thanks folks.
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094826.shtml
04-07-2009 10:48 AM
Hello Marlon,
the aggregate-address creates a summarized route 12.30.0.0 with mask 255.255.192.0 and it will suppress the component routes (summary-only)
The summary route is created if at least a component route exists in the BGP table.
In your case this can be the result of redistribution of OSPF into BGP
As you can see prefixes within 12.30.0.0/18 are accepted in the route-map used to redistribute OSPF routes into BGP (prefix-list)
Hope to help
Giuseppe
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: