From: Padhu (LFG) (padhu@xxxxxxxxxxxx)
Date: Wed May 09 2001 - 14:36:38 GMT-3
Can you shutdown 206.11.20.17 with debug ip routing and debug ip bgp /
updates running and let us know if its going via the other one ?
Cheers,Padhu
-----Original Message-----
From: Mohamed Heeba [mailto:MAHeeba@itqan.co.ae]
Sent: Wednesday, May 09, 2001 11:57 AM
To: 'Padhu (LFG)'; 'Rob Hopkins'; Mohamed Heeba; ccielab@groupstudy.com
Subject: RE: BGP maximum paths
genltemen ;
i read most of the posts until now and i didnt find any convencing answer.
the static routes config are not allowed unless specified .so i cannot
configure static routes to point to both of the links otherwise it will be
static routes load balancing.
the other solution of config with loopbacks and multihop is ok ,but this is
another way to config the balance plus the the lab solutions is showing the
ser IP as the peer address .
no synch is helpless here since the routes are learned externally ,no synch
will affect only when the routes are learnt internally to let them appear in
the route table and then propagated.
the last answer was about the confederation ,R2 and R5 are in confederation
inside the AS 200 ,the AS 300 has nothin to do with that since confederation
should be transparen to it .
as per halabi ,once you put the maximum path command ,any routes learnt from
two peers in the same AS and showing in the BGP table ,should appear in the
routing table as well...this doesnt happen with me .
the two routes are in the BGP table and the prefered one is based on the
lowest IP (this means they are identical in everything ) ,however they dont
show in the route table .......
anything there i missed ?????
> -----Original Message-----
> From: Padhu (LFG) [SMTP:padhu@steinroe.com]
> Sent: Wednesday, May 09, 2001 9:15 AM
> To: 'Rob Hopkins'; Mohamed Heeba; ccielab@groupstudy.com
> Subject: RE: BGP maximum paths
>
> Rob
>
> Since R2 and R5 are in confederation in As 200,wouldn't this be
> transparent
> to AS300 ? ..that is, all R1 knows about is AS200.... Would no sync help
> here to install both routes in the IP table ?
>
> Cheers,Padhu
>
> -----Original Message-----
> From: Rob Hopkins [mailto:rshopkins@earthlink.net]
> Sent: Wednesday, May 09, 2001 10:54 AM
> To: Mohamed Heeba; ccielab@groupstudy.com
> Subject: Re: BGP maximum paths
>
>
> with bgp max paths, both paths must be from the same AS
>
>
> Thanks,
>
> Rob Hopkins
>
>
>
>
>
>
>
> 1.6180339887499
> ----- Original Message -----
> From: "Mohamed Heeba" <MAHeeba@itqan.co.ae>
> To: <ccielab@groupstudy.com>
> Sent: Wednesday, May 09, 2001 10:04 AM
> Subject: BGP maximum paths
>
>
> > guys ,
> > i have a router R1 in AS 300 ,connecting to another AS 200 thourgh two
> > serial connection ,each one going to different routers R2 and R5 (they
> are
> > in confederation in As 200)
> > the requirement is to load balance the traffic across both of the links.
> > i have enabled the maximum paths 2 command on the BGP .
> > but still the routes didnt appear in the routing table .
> > they are on the bgp table ,showing two paths ,the prefered one is even
> the
> > one with the lowest ip address .
> >
> > R1 is running 11.1 , do i need to enable anything else to get the routes
> in
> > the ip route table ???
> > here is R1 configs
> >
> >
> > ------------------------------
> > interface Loopback0
> > ip address 206.11.5.1 255.255.255.0 secondary
> > ip address 206.11.6.1 255.255.255.0 secondary
> > ip address 206.11.7.1 255.255.255.0 secondary
> > ip address 206.11.4.1 255.255.255.0
> > no ip mroute-cache
> > no ip route-cache
> > !
> > interface Serial0
> > ip address 206.11.20.18 255.255.255.248
> > no ip mroute-cache
> > no ip route-cache
> > bandwidth 64
> > !
> > interface Serial1
> > ip address 206.11.20.66 255.255.255.248
> > no ip mroute-cache
> > no ip route-cache
> > bandwidth 64
> > !
> > router bgp 300
> > network 206.11.4.0
> > network 206.11.5.0
> > network 206.11.6.0
> > network 206.11.7.0
> > neighbor 206.11.20.17 remote-as 200
> > neighbor 206.11.20.65 remote-as 200
> > maximum-paths 2
> > no auto-summary
> > !
> >
> >
> > r2501#sh ip bgp
> > BGP table version is 19, local router ID is 206.11.4.1
> > 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
> > * 10.0.0.2/32 206.11.20.65 0 200 i
> > *> 206.11.20.17 0 0 200 i
> > * 10.0.0.4/32 206.11.20.65 0 200 i
> > *> 206.11.20.17 0 200 i
> > * 10.0.0.5/32 206.11.20.65 0 0 200 i
> > *> 206.11.20.17 0 200 i
> > * 10.1.1.0/24 206.11.20.65 0 200 100 i
> > *> 206.11.20.17 0 200 100 i
> > * 20.1.1.0/24 206.11.20.65 0 200 100 i
> > *> 206.11.20.17 0 200 100 i
> > * 22.1.1.0/24 206.11.20.65 0 200 100 i
> > *> 206.11.20.17 0 200 100 i
> > * 24.1.1.0/24 206.11.20.65 0 200 100 i
> > *> 206.11.20.17 0 200 100 i
> > *> 206.11.4.0 0.0.0.0 0 32768 i
> > *> 206.11.5.0 0.0.0.0 0 32768 i
> > *> 206.11.6.0 0.0.0.0 0 32768 i
> > *> 206.11.7.0 0.0.0.0 0 32768 i
> > r2501#
> >
> >
> > r2501#sh ip route
> > Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> > i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> > default
> > U - per-user static route
> >
> > Gateway of last resort is not set
> >
> > 10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
> > B 10.0.0.2/32 [20/0] via 206.11.20.17, 00:14:16
> > B 10.1.1.0/24 [20/0] via 206.11.20.17, 00:14:16
> > B 10.0.0.4/32 [20/0] via 206.11.20.17, 00:14:17
> > B 10.0.0.5/32 [20/0] via 206.11.20.17, 00:14:17
> > 20.0.0.0/24 is subnetted, 1 subnets
> > B 20.1.1.0 [20/0] via 206.11.20.17, 00:14:17
> > 22.0.0.0/24 is subnetted, 1 subnets
> > B 22.1.1.0 [20/0] via 206.11.20.17, 00:14:17
> > 24.0.0.0/24 is subnetted, 1 subnets
> > B 24.1.1.0 [20/0] via 206.11.20.17, 00:14:17
> > C 206.11.5.0/24 is directly connected, Loopback0
> > C 206.11.4.0/24 is directly connected, Loopback0
> > C 206.11.7.0/24 is directly connected, Loopback0
> > C 206.11.6.0/24 is directly connected, Loopback0
> > 206.11.20.0/29 is subnetted, 2 subnets
> > C 206.11.20.64 is directly connected, Serial1
> > C 206.11.20.16 is directly connected, Serial0
> > r2501#
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