From: Ludwig Morales (lud.morales@xxxxxxxxxxxxxx)
Date: Sun Jun 02 2002 - 21:40:56 GMT-3
yes network 192.168.100.0 is in the BGP table of the other peers, apparently
i had it all wrong, i was trying to make this network (learned from EBGP at
the border router and passed as IBGP to interna routers) appear in the
internal routers (look at solies page 175, i was trying to make that network
appear on aspen and telluride's routing table) by redistributing static
routes and doing all kinds of stuff but aparently I was missing a rule,
"IBGP learned routes are no entered in the routing table when
synchronization is enable" at least this is what Solie says in Routing
TCP/IP Vol.2 page170,
This brings up my next quetion, is redistribution at the border router the
only way to make the internal routers (IBGP peering routers) know about the
external networks?
Thanks for your help!!
Ludwig
----- Original Message -----
From: "Michael Popovich" <m.popovich@mchsi.com>
To: "Ludwig Morales" <lud.morales@codetel.net.do>
Sent: Sunday, June 02, 2002 8:26 PM
Subject: Re: PRPOBLEM WITH BGP SYNCHRONIZATION
> If you go to the other IBGP peers what do you see when a "show ip bgp"
>
> is the 192.168.100.0 network in their bgp table?
>
> If so what do you see when you do a "show ip bgp 192.168.100.0" on the
other
> routers? That should give you a clue as to what the issue is.
>
> I would be interested in see what the other routers show with the above
> commands.
>
> MP
> ----- Original Message -----
> From: "Ludwig Morales" <lud.morales@codetel.net.do>
> To: <ccielab@groupstudy.com>
> Sent: Sunday, June 02, 2002 6:03 PM
> Subject: PRPOBLEM WITH BGP SYNCHRONIZATION
>
>
> > Pie ChartsHi everyone!
> >
> > Can someone digest the BGP synchronization rule for me and explain it,
for
> > what i thought BGP would not put a route in the routing table until it
was
> > learn from an IGP if sync was on, well this router has 2 IBGP sessions
> with
> > border routers, 1 border router advertises the netwotk 192.168.100.0/24
> (you
> > can see that i learn this router int the BGP table) so i made a static
> route
> > and redistribute it in OSPF, no i have a route to 192.168.100.0/24 in my
> > routing table but still BGP would not put it's route in the table, what
am
> i
> > doing wrong here? how do i make the IBGP peering routers learn the BGP
> > routes without actually redistributing IGP?
> >
> > Regards,
> >
> > Ludwig
> >
> > !
> > !
> > interface Loopback0
> > ip address 1.1.1.1 255.255.255.0
> > !
> > interface Ethernet0
> > no ip address
> > shutdown
> > !
> > interface Serial0
> > no ip address
> > encapsulation frame-relay
> > frame-relay lmi-type cisco
> > !
> > interface Serial0.1 point-to-point
> > ip address 192.168.1.222 255.255.255.252
> > frame-relay interface-dlci 108
> > !
> > interface Serial0.2 point-to-point
> > ip address 192.168.1.198 255.255.255.252
> > frame-relay interface-dlci 107
> > !
> > interface Serial1
> > no ip address
> > !
> > router ospf 100
> > log-adjacency-changes
> > redistribute static subnets
> > network 192.168.1.0 0.0.0.255 area 0
> > !
> > router bgp 100
> > bgp log-neighbor-changes
> > network 192.168.1.196 mask 255.255.255.252
> > network 192.168.1.220 mask 255.255.255.252
> > neighbor 192.168.1.197 remote-as 100
> > neighbor 192.168.1.221 remote-as 100
> > !
> > ip classless
> > ip route 192.168.100.0 255.255.255.0 192.168.1.221
> > ip http server
> > !
> > !
> > alias exec f show running-config | begin
> > !
> > line con 0
> > line 1 7
> > modem Host
> > transport input all
> > stopbits 1
> > line 8
> > modem InOut
> > transport input all
> > stopbits 1
> > line aux 0
> > line vty 0 4
> > login
> > !
> > end
> >
> > R1#sh ip ro
> > Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> > N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> > E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> > i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
intea
> > * - candidate default, U - per-user static route, o - ODR
> > P - periodic downloaded static route
> >
> > Gateway of last resort is not set
> >
> > 1.0.0.0/24 is subnetted, 1 subnets
> > C 1.1.1.0 is directly connected, Loopback0
> > 192.168.1.0/30 is subnetted, 3 subnets
> > O 192.168.1.224 [110/74] via 192.168.1.221, 00:02:28, Serial0.1
> > C 192.168.1.196 is directly connected, Serial0.2
> > C 192.168.1.220 is directly connected, Serial0.1
> > S 192.168.100.0/24 [1/0] via 192.168.1.221
> > R1#sh ip bgp
> > BGP table version is 5, local router ID is 1.1.1.1
> > Status codes: s suppressed, d damped, h history, * valid, > best, i -
intl
> > Origin codes: i - IGP, e - EGP, ? - incomplete
> >
> > Network Next Hop Metric LocPrf Weight Path
> > *> 192.168.1.196/30 0.0.0.0 0 32768 i
> > * i192.168.1.204/30 192.168.1.197 0 100 0 i
> > * i192.168.1.208/30 192.168.1.221 0 100 0 i
> > *> 192.168.1.220/30 0.0.0.0 0 32768 i
> > *>i192.168.1.224/30 192.168.1.221 0 100 0 i
> > *>i192.168.100.0 192.168.1.225 0 100 0 200 i
> > * i192.168.200.0 192.168.1.225 0 100 0 200 i
> > R1#
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