From: Connary, Julie Ann (jconnary@xxxxxxxxx)
Date: Fri Jan 05 2001 - 18:23:56 GMT-3
Hi All,
I have a frame-relay hub and spoke network with the hub as the
route-reflector server and the spokes as clients.
R3---------------EBGP ---------R4
| 137.20.34.3 137.20.34.4
| 137.20.1.3
|
IBGP
|
|
| 137.20.1.1 137.20.1.5 137.20..129.5 137.20.129.7
R1-----------------ibgp ---------R5----------EBGP ------------R7
R1 is the frame-relay hub with R3 and R5 as spokes.
R7 is initiating a route - 160.0.0.0/4. R4 is also intiating a route -
172.168.2.0
I had setup R1 to route-reflect to R5, but not to R3. So I had expected
that R5 would see the
route from R4, but R3 should not see the route from R7 - as R1 should not
reflect it - correct?
On R3 I see the following:
r3#show ip bgp
BGP table version is 33, local router ID is 137.20.31.65
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i160.0.0.0/4 137.20.129.7 100 0 3 i
*> 172.168.2.0/24 137.20.34.4 0 0 1 ?
r3#show ip bgp 160.0.0.0
BGP routing table entry for 160.0.0.0/4, version 33
Paths: (1 available, best #1)
3, (aggregated by 3 170.10.10.1)
137.20.129.7 (metric 84) from 137.20.1.1 (137.20.129.5)
Origin IGP, localpref 100, valid, internal, atomic-aggregate, best
Originator : 137.20.129.5, Cluster list: 137.20.11.33
With a BGP setup of:
!
router bgp 2
neighbor 137.20.1.1 remote-as 2
neighbor 137.20.34.4 remote-as 1
On R1 I see:
r1#show ip bgp
BGP table version is 25, local router ID is 137.20.11.33
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i160.0.0.0/4 137.20.129.7 100 0 3 i
*>i172.168.2.0/24 137.20.34.4 0 100 0 1 ?
r1#show ip bgp 160.0.0.0
BGP routing table entry for 160.0.0.0/4, version 25
Paths: (1 available, best #1, advertised over IBGP)
3, (aggregated by 3 170.10.10.1), (Received from a RR-client)
137.20.129.7 (metric 84) from 137.20.1.5 (137.20.129.5)
Origin IGP, localpref 100, valid, internal, atomic-aggregate, best
with a bgp setup of:
router bgp 2
no synchronization
neighbor 137.20.1.3 remote-as 2
neighbor 137.20.1.5 remote-as 2
neighbor 137.20.1.5 route-reflector-client
neighbor 137.20.12.2 remote-as 2
neighbor 137.20.12.2 route-reflector-client
(note that 137.20.1.3 is not a route-reflector-client.)
On R5 I have:
r5#show ip bgp
BGP table version is 3, local router ID is 137.20.129.5
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 160.0.0.0/4 137.20.129.7 0 3 i
*>i172.168.2.0/24 137.20.34.4 0 100 0 1 ?
r5#show ip bgp 160.0.0.0
BGP routing table entry for 160.0.0.0/4, version 3
Paths: (1 available, best #1, advertised over IBGP)
3, (aggregated by 3 170.10.10.1)
137.20.129.7 from 137.20.129.7 (170.10.10.1)
Origin IGP, valid, external, atomic-aggregate, best
with a setup of:
router bgp 2
no synchronization
neighbor 137.20.1.1 remote-as 2
neighbor 137.20.129.7 remote-as 3
!
any ideas why R3 sees this route? Is this correct?
thanks,
Julie Ann
------------------------------------------------------------------------
Julie Ann Connary
| | Network Consulting Engineer
||| ||| Federal Support Program
.|||||. .|||||. 13635 Dulles Technology Drive,
Herndon VA 20171
.:|||||||||:.:|||||||||:. Pager: 1-888-642-0551
c i s c o S y s t e m s Email: jconnary@cisco.com
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