From: mohamed_n@sifycorp.com
Date: Thu Jan 20 2005 - 03:32:14 GMT-3
Hi,
The network 10.99.99.0 is not advertised in R2 to R3,so R3 dont have any clue of where this network is..
So even if you get the L0 route in R3,you cant ping bcoz R3 dont know to reach 10.99.99.0.
Getting in BGP table is a matter of administrative distance,if ia route is learned by OSPF and BGP,it prefers OSPF only..
Enabling or disabling synchronization matters only with BGP table,so in routing table,you will only have best paths..if u redistribute everything,then you should ping by IGP itself..
The most important thing is a ROUTER WONT SEND an IBGP update to another IBGP peer..
Hope this should help..
Thanks
Mohamed.
naleyevka@yahoo.com:
> Hi,
> I have a scenario with 3 routers, R1, R2 and R3, all
> three configured to be iBGP neighbors, in AS 10.iBGP
> full mesh is not allowed, Confederation is not
> allowed. Between R1 and R2 I am runnning OPSF, between
> R2 and R3 Im running EIGRP
>
> / 10.99.99.0/24 BGP-AS10
>
> / |
> R1-.2-------OSPF----.1-R2-------EIGRP-------R3
> |
> |
> L1 L0-13.13.13.13/24
>
> I have created a L0 on R1 and advertised this into BGP
> with the network command. I have to make sure that R3
> sees this network in its routing table, I CANNOT
> diasble syncronization.
> I injected L1 into OSPF, redistributed into EIGRP on
> R2
> and R3 has a route to L1 installed in its touting
> table, as an DEX with an admin of 170. So far so good(
> my redistribution work, the config is OK).
>
> I have configured iBGP on R1, R2 and R3, injected
> L0(13.13.13.0/24) into BGP on R1, with Syncronization
> disabled, R3 installs this entry in its BGP and
> routing table(Configuration is OK).
> on R2 I have configured under the BGP process
> neighbor R3 next-hop-self
>
> when I do a show ip bgp, the next hop is 10.99.99.2
> which is the serial interface of R1, it carries this
> over without changing the next hop, I was expecting to
> see the next hop the serial interface of router R2,
> therefore I am not able to ping.
>
> Second problem:
> With syncronization enable, R2 receives a BGP update
> the 13.13.13.0/24 network and installs it in its bgp
> table, but not as best path(this entry is not in the
> routing table), I have decided to redistribute BGP
> into the IGP and carry the network over to R3.
> I done it on R1 under the OSPF process I have
> redistributed bgp 10 subnets with and without a route
> map, under the route-map I have matched local,
> internal and external routes. I am not able to see
> 13.13.13.0 in the OSPF database.It doesnt work.
> I moved over to R2 and I done all over again under the
> EIGRP process, it makes no difference. It doesnt
> appear in the EIGRP topology. In both cases I have
> enabled bgp redistribute internal under the bgp
> process.
> Would someone please shed some light on this issue.
> It is much appreciated.
> Thank you
> Nathasha
>
>
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Wed Feb 02 2005 - 22:10:24 GMT-3