AS101010 is a directly connected
^10101$ You can always do a quick check with "sh ip bgp regex ^10101$" (I believe i have the syntax correct) From: Amer Mustafa [mailto:[email protected]] Sent: November-30-10 7:52 PM To: [email protected] Cc: Jason Maynard Subject: Workbook 1 , lab 13 , task 13.20. Workbook 1 , lab 13 , task 13.20. Due to a requirement of task to make sure that routes native to AS 10101 go through R8 in AS 7800 . To accomplish this i have added the following IP AS-Path access-list on R7 : ip as-path access-list 1 permit 10101$ route-map ASN101010 permit 10 match as-path 1 set local-preference 200 route-map ASN101010 permit 20 and applied it in the bgp 7800 : router bgp 7800 no synchronization bgp log-neighbor-changes network 150.100.78.0 mask 255.255.255.0 network 150.100.220.0 mask 255.255.255.0 network 150.100.221.0 mask 255.255.255.0 network 200.0.0.7 mask 255.255.255.255 neighbor task20 peer-group neighbor task20 ebgp-multihop 5 neighbor task20 update-source Loopback0 neighbor 150.100.78.8 remote-as 7800 neighbor 150.100.78.8 next-hop-self neighbor 150.100.78.8 route-map ASN10101 in neighbor 200.0.0.5 remote-as 109 neighbor 200.0.0.5 peer-group task20 neighbor 200.0.0.6 remote-as 109 neighbor 200.0.0.6 peer-group task20 no auto-summary but due to this, all prefixes are blocked from R8, even the one which are coming from BB2 : R7(config)#do show ip bgp sum BGP router identifier 200.0.0.7, local AS number 7800 BGP table version is 519, main routing table version 519 Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 150.100.78.8 4 7800 253 271 519 0 0 00:06:00 0 200.0.0.5 4 109 104 98 519 0 0 01:08:11 257 200.0.0.6 4 109 114 117 519 0 0 01:06:39 257 is my regular expression config and ip as-path access-list is correct ? can anyone advice the reason of this ? also can anyone tell what will be the difference in : ip as-path access-list 1 permit 10101$ AND ip as-path access-list 1 permit ^10101$ Note: if the route-map of the ip as-path is removed the routes are back to normal.
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