From: Ken.Farrington@barclayscapital.com
Date: Wed Oct 15 2003 - 08:14:12 GMT-3
+--------------+
| AS1 |
| +----+ |
| | R2 | |
| +----+ |
| | |
| | |
| | |
| +----+ |
| | R1 | |
| +----+ |
| | |
+------|-------+
|
+------|--------+
| +----+ |
| | R3 | |
| +----+ |
| AS2 |
+---------------+
Simple BGP Scenario/
I have multiple routes being asvertised via BGP from R2 throught the ASs
I want to summarise the routes to one single route on R1 so it advertises
as summary to R3 in AS2.
I also, want to stop this summary from being advertised back into AS1.
I can do this with a neighbor route map, but which route-map is correct.
They both work, and I am panicing becuase what they may ask in the lab, I
may do
one way and they expect another.
Many thx in advanced for any tips
Ken
!
router bgp 620
no synchronization
bgp log-neighbor-changes
bgp confederation identifier 600
aggregate-address 142.220.0.0 255.255.0.0 summary-only
neighbor 22.22.22.22 remote-as 620
neighbor 22.22.22.22 ebgp-multihop 255
neighbor 22.22.22.22 update-source Loopback0
neighbor 22.22.22.22 route-map NO-SUMMARY out
neighbor 33.33.33.33 remote-as 500
neighbor 33.33.33.33 ebgp-multihop 255
neighbor 33.33.33.33 update-source Loopback0
!
access-list 18 permit 142.220.0.0
!
route-map NO-SUMMARY deny 10
match ip address 18
!
route-map NO-SUMMARY permit 20
----------------or---------------------
access-list 18 deny 142.220.0.0
access-list 18 permit any
!
route-map DENY-SUMM permit 10
match ip address 18
!
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