From: Jason Wydra (jasonwydra@xxxxxxxxx)
Date: Mon May 06 2002 - 18:36:56 GMT-3
CONFIGS
R1
interface TokenRing0/0
ip address 204.156.20.5 255.255.255.252
ring-speed 16
!
interface BRI0/0
no ip address
shutdown
cdapi buffers regular 0
cdapi buffers raw 0
cdapi buffers large 0
!
interface Serial0/1
no ip address
shutdown
!
interface FastEthernet1/0
ip address 204.156.20.2 255.255.255.252
shutdown
duplex auto
speed auto
!
router bgp 3127
no synchronization
bgp log-neighbor-changes
network 204.156.20.4 mask 255.255.255.252
neighbor 165.40.23.1 remote-as 3127
neighbor 204.156.20.6 remote-as 3127
neighbor 204.156.20.6 next-hop-self
R2
interface Serial0/0
no ip address
shutdown
no fair-queue
!
interface TokenRing0/0
ip address 204.156.20.6 255.255.255.252
interface BRI0/0
!
interface BRI0/0
no ip address
shutdown
cdapi buffers regular 0
cdapi buffers raw 0
cdapi buffers large 0
!
interface Serial0/1
no ip address
shutdown
!
interface FastEthernet1/0
ip address 165.40.23.0 255.255.254.0
shutdown
duplex auto
speed auto
!
router bgp 3127
no synchronization
bgp log-neighbor-changes
network 165.40.22.0 mask 255.255.254.0
network 204.156.20.4 mask 255.255.255.252
neighbor 165.40.23.1 remote-as 3127
neighbor 204.156.20.5 remote-as 3127
R3
interface Ethernet0/0
ip address 165.40.23.1 255.255.254.0
shutdown
half-duplex
!
interface Serial0/0
no ip address
no fair-queue
shutdown
no fair-queue
frame-relay lmi-type cisco
!
interface BRI0/0
ip unnumbered Ethernet0/0
encapsulation ppp
shutdown
timeout absolute 35000 0
dialer idle-timeout 2147483
dialer map ip 204.156.20.1 5340
dialer-group 1
isdn switch-type basic-ni
isdn spid1 01532001 5320
isdn spid2 01532101 5321
cdapi buffers regular 0
cdapi buffers raw 0
cdapi buffers large 0
!
interface Serial0/1
no ip address
shutdown
!
router bgp 3127
no synchronization
bgp log-neighbor-changes
network 165.40.22.0 mask 255.255.254.0
neighbor 165.40.23.0 remote-as 3127
neighbor 204.156.20.5 remote-as 3127
!
"Logan, Harold" <loganh@mccfl.edu> wrote: Would you please post your bgp conf
igs? It would make the discussion a bit easier.
Hal
-----Original Message-----
From: Jason Wydra [mailto:jasonwydra@yahoo.com]
Sent: Monday, May 06, 2002 4:01 PM
To: Carlos G Mendioroz
Cc: Groupstudy ccielab list
Subject: Re: IBGP HELP??
I'm not running an IGP yet R1 learns about R3 via R2. I have a network statemen
t on R2 for both links to R1 and R2. R1 has the route to R3 in its bgp and ip r
oute table. R3 learns nothing from R2 about networks on the R1 side. Need to pu
t a static route in on R3 pointing to R2 as next hop for the TCP connection to
come up.
Carlos G Mendioroz wrote: Jason,
What IGP are you running ?
How is R1 supposed to learn how to reach R3 ?
Remember that iBGP will never (well almost never *) relay
information, so you need some IGP to do that.
(Hmm, you said that R1 has learned via BGP the 165.40.22.0/23,
so it has to be originated at R2, may be by a network command.
Do you have a simmilar network command for the 204.156.20.0/30 ?)
(*) The "almost never" relates to setups like route reflectors,
where you get a controlled iBGP redistribution.
HTH.
Jason Wydra wrote:
>
> I have AS 3127 with 3 routers. R1 is connected to R2 via Token ring. R2 is co
nnected to R3 via Ethernet. R1 and R3 do not have a direct connection. They are
attempting to peer through R2. R1 and R2 neighbor states are active. R2 and R3
neighbor state is active. R1 and R3 neighbor state will NOT come up. The netwo
rk on link between R1 and R2 is 204.156.20.0/30 and network between R2 and R3 i
s 165.40.22.0/23. From R1 I CANNOT ping R3. R1 has learned a route from BGP to
R3. Looking on R3 it has not learned a route to R1 (From R2). This is obviously
why I cannot ping from R1 to R3 and this is also why the BGP peer won't come u
p. Simply adding a static route on R3 pointing to R1 solves the problem and my
BGP peers comes up. My question is why does R2 tell R1 about the 165 network bu
t R2 does not tell R3 about the 204 network? Why do I have to add a static to R
3? Please help!!
>
> Jason Wydra
>
> CCNP,CCDP
>
> ---------------------------------
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