From: Liekun Ye (liekun@xxxxxxxxxxxxx)
Date: Thu Nov 08 2001 - 23:05:51 GMT-3
Ok, Here is my real configure, Pls help me to figure it out. TKS.
Here is my config on R1/R2/R3
Configure on R1
=========================================
hostname RTR-1
!
!
ip subnet-zero
!
!
!
!
!
interface Loopback0
ip address 133.3.1.1 255.255.255.0
no ip directed-broadcast
ip ospf network point-to-point
!
interface Ethernet0
ip address 133.3.13.1 255.255.255.0
no ip directed-broadcast
!
interface Ethernet1
no ip address
no ip directed-broadcast
!
interface Serial0
ip address 133.3.12.1 255.255.255.0
no ip directed-broadcast
clockrate 2000000
!
interface Serial1
no ip address
no ip directed-broadcast
shutdown
!
router ospf 100
network 133.3.34.0 0.0.0.255 area 0
network 133.3.0.0 0.0.255.255 area 0
!
router bgp 100
neighbor 133.3.12.2 remote-as 100
neighbor 133.3.12.2 route-reflector-client
neighbor 133.3.13.3 remote-as 100
neighbor 133.3.13.3 route-reflector-client
no auto-summary
!
ip classless
>>>>show ip bgp <<<< output
BGP table version is 2, local router ID is 133.3.1.1
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
*>i100.100.1.0/24 133.3.13.3 10 100 0 ?
Configure on R2
===========================================
interface Loopback0
ip address 133.3.2.2 255.255.255.0
no ip directed-broadcast
ip ospf network point-to-point
!
interface Serial0
ip address 133.3.12.2 255.255.255.0
no ip directed-broadcast
!
interface Serial1
ip address 133.3.23.2 255.255.255.0
no ip directed-broadcast
clockrate 2000000
!
interface TokenRing0
no ip address
no ip directed-broadcast
shutdown
ethernet-transit-oui 90-compatible
ring-speed 16
source-bridge 10 1 100
source-bridge spanning 100
!
router ospf 100
network 133.3.0.0 0.0.255.255 area 0
!
router bgp 100
bgp router-id 133.3.2.2
neighbor 133.3.12.1 remote-as 100
!
ip classless
!
>>>>show ip bgp <<<<
BGP table version is 1, local router ID is 133.3.2.2
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
* i100.100.1.0/24 133.3.13.3 10 100 0 ?
======
It's valid, but not best, so will not advertise to another peer, if there are a
ny.
======
Configure On R3
===================================
interface Loopback0
ip address 133.3.3.3 255.255.255.0
no ip directed-broadcast
ip ospf network point-to-point
!
interface Loopback1
ip address 100.100.1.1 255.255.255.0
no ip directed-broadcast
ip ospf network point-to-point
!
interface Ethernet0/0
ip address 133.3.13.3 255.255.255.0
no ip directed-broadcast
!
interface Serial0/0
ip address 133.3.23.3 255.255.255.0
no ip directed-broadcast
!
interface Ethernet0/1
no ip address
no ip directed-broadcast
shutdown
!
router ospf 100
router-id 133.3.3.3
redistribute connected subnets route-map con2ospf
network 133.3.0.0 0.0.255.255 area 0
!
router bgp 100
bgp router-id 133.3.3.3
redistribute connected metric 10 route-map con2bgp
neighbor 133.3.13.1 remote-as 100
no auto-summary
!
ip classless
ip http server
!
access-list 1 permit 100.100.1.0
route-map con2bgp permit 10
match ip address 1
!
route-map con2ospf permit 10
match ip address 1
>>>>show ip bgp <<<<output
BGP table version is 6, local router ID is 133.3.3.3
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
*> 100.100.1.0/24 0.0.0.0 10 32768 ?
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of SFeldber
g@edeltacom.com
Sent: Friday, November 09, 2001 4:54 AM
To: Liekun Ye
Cc: ccielab@groupstudy.com; nobody@groupstudy.com
Subject: Re: BGP synchro problem
You say that you have redistributed the route into BGP on R3. Is this
where are you redistributing 100.100.1.0 into OSPF as well? I have a hunch
that it is your redistribution of this network is the answer to your
question about why EIGRP works but OSPF does not. Remember that the key to
synchronization is having a valid entry in the routing table. If the BGP
route is invalid on R2, then you need to investigate why R2 is not learning
about 100.100.1.0 from the OSPF protocol.
Steve
"Liekun Ye"
<liekun@china To: <ccielab@groupstudy.com>
weal.com> cc:
Sent by: Subject: BGP synchro problem
nobody@groups
tudy.com
11/08/2001
07:33 AM
Please
respond to
"Liekun Ye"
Hi, group,
I have a tough problem in bgp configuration. Look at the scenario
below,
Assume that bgp synchronization is enabled by default. R1 act as RR, a
connected
route 100.100.1.0/24 is redistribute into bgp 1 at R3; all three router
runs ospf,
this ibgp route is valid at R1, but shows invalid at R2, also
100.100.1.0/24 is
redistributed to ospf to make igp route synchronize with bgp route. If use
eigrp
to replace ospf as a igp, everything is ok. why ?
Any suggestion is appreciated!
+--------+ +-------+
| | | |
| R1 |------------------| R2 |
+--------+ +---|---+
| |
| |
| |
| |
| +-------+
| | |
+----------------------| R3 |100.100.1.0/24 redis into bgp
| |
+-------+
Liekun Ye
Nov. 3, 2001
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