From: Shamin (ccie.xpert@gmail.com)
Date: Wed May 24 2006 - 13:26:24 ART
Hi all,
I am stuck in a problem from the IEWB VER3 LAB-8 Task 4.5. The scenario is
as follows :
BB3 (AS 54)
|
(EBGP) Eth0/0 {174.1.1.1/24}
| |
R5(AS 65145) ----------- R1(AS 65145 )
-----------(EBGP)----------- R3(AS 65038) -----------(EBGP)---- R2(AS 65267)
| |
| |
|____R4(AS 65145)__|
The question states as follows :
1) Advertise 174.1.1.0/24 network into the bgp domain on R1
2) Devices outside of AS 65145 should not have reachability to this
network
3) Do not use any access-list or prefix lists to accomplish this.
The solution provided is as follows on R1 -
R1#
router bgp 65145
network 174.1.1.0 mask 255.255.255.0 route-map LOCAL_AS
neighbor 150.1.5.5 send-community
!
route-map LOCAL_AS permit 10
set community local-As
Can anyone help me understand the two statements under the router bgp ,
especially the network statement. And what does this Local-As
community actually do. When i configured this in my lab, I was not able to
see the 174.1.1.0/24 network on R3 as required. Why didnt R1 sent the
update to R3 because as per above configurations , I dont see any reason for
R1 not adverstising 174.1.1.0/24 to R3.
Please help me understand the scenario.
Regards
Shamin
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