[c-nsp] BGP, RIP and default routes advice
Rodney Dunn
rodunn at cisco.com
Thu Aug 5 11:09:34 EDT 2004
Did you check the downstream router?
Try looking at the full 'sh log' or
try "sh log | incl RIP|tag".
hub_#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 inter area
* - 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, Serial2/0.1
4.0.0.0/32 is subnetted, 1 subnets
C 4.4.4.1 is directly connected, Loopback0
hub_#sh ip rip da
hub_#sh ip rip database
0.0.0.0/0 auto-summary
0.0.0.0/0 redistributed
[0] via 0.0.0.0,
1.0.0.0/8 auto-summary
1.1.1.0/24 directly connected, Serial2/0.1
4.0.0.0/8 auto-summary
4.4.4.1/32 directly connected, Loopback0
hub_#debug ip rip
RIP protocol debugging is on
hub_#
*Aug 5 15:06:43.514: RIP: sending v2 update to 224.0.0.9 via Serial2/0.1 (1.1.1.1)
*Aug 5 15:06:43.514: RIP: build update entries
*Aug 5 15:06:43.514: 0.0.0.0/0 via 0.0.0.0, metric 1, tag 0
*Aug 5 15:06:43.514: 4.0.0.0/8 via 0.0.0.0, metric 1, tag 0
*Aug 5 15:06:43.514: RIP: sending v2 update to 224.0.0.9 via Loopback0 (4.4.4.1)
*Aug 5 15:06:43.514: RIP: build update entries
*Aug 5 15:06:43.514: 0.0.0.0/0 via 0.0.0.0, metric 1, tag 0
*Aug 5 15:06:43.514: 1.0.0.0/8 via 0.0.0.0, metric 1, tag 0
*Aug 5 15:06:43.566: RIP: ignored v2 packet from 4.4.4.1 (sourced from one of our addresses)
hub_#un all
All possible debugging has been turned off
You show command would have missed it because the route is on
a separate line.
See if that is what it is.
Rodney
On Thu, Aug 05, 2004 at 04:47:00PM +0200, Marco Matarazzo wrote:
> I tried that, but it's not working, so I thought that without a default
> router installed, it wouldn't originate one:
>
> Border router:
>
> router rip
> version 2
> passive-interface default
> no passive-interface FastEthernet0/0.6
> network 1.1.1.1
> default-information originate
> no auto-summary
>
> 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
> 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, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
> ia - IS-IS inter area, * - candidate default, U - per-user static
> route
> o - ODR, P - periodic downloaded static route
>
> Gateway of last resort is not set
>
> [output omitted]
>
> sh ip rip dat
> 1.0.0.0/8 auto-summary
> 1.1.1.0/20 directly connected, Null0
> 1.1.1.1/29 directly connected, FastEthernet0/0.6
>
> sh log | in RIP
> Aug 5 16:43:30.621: RIP-DB: redist 0.0.0.0/0(metric 0) to RIP
> Aug 5 16:43:43.129: RIP-TIMER: periodic timer expired
> Aug 5 16:43:43.129: RIP: sending v2 update to 224.0.0.9 via
> FastEthernet0/0.6 (81.29.192.82)
> Aug 5 16:43:43.129: RIP: build update entries
> Aug 5 16:43:43.129: RIP: Update contains 1 routes
> Aug 5 16:43:43.129: RIP: Update queued
> Aug 5 16:43:43.129: RIP: Update sent via FastEthernet0/0.6
>
> It's sending always only one route, the default is never sent, and it's not
> in the RIP database... but from the debug output, it seems to redistribute
> 0.0.0.0/0 to RIP... what can be wrong?!?!
>
> Cheers,
> ]\/[arco
>
>
> ----- Original Message -----
> From: "Rodney Dunn" <rodunn at cisco.com>
> To: "Sam Stickland" <sam_ml at spacething.org>
> Cc: "Marco Matarazzo" <marmata at libero.it>; <cisco-nsp at puck.nether.net>
> Sent: Thursday, August 05, 2004 3:14 PM
> Subject: Re: [c-nsp] BGP, RIP and default routes advice
>
>
> > Yep...
> >
> >
> > hub_#sh run | begin router rip
> > router rip
> > version 2
> > network 1.0.0.0
> > network 4.0.0.0
> > default-information originate
> >
> > hub_#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 inter
> area
> > * - 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, Serial2/0.1
> > 4.0.0.0/32 is subnetted, 1 subnets
> > C 4.4.4.1 is directly connected, Loopback0
> >
> >
> > downstream spoke:
> >
> > spokeA_#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 inter
> area
> > * - candidate default, U - per-user static route, o - ODR
> > P - periodic downloaded static route
> >
> > Gateway of last resort is 1.1.1.1 to network 0.0.0.0
> >
> > 1.0.0.0/24 is subnetted, 1 subnets
> > C 1.1.1.0 is directly connected, Serial3/0.1
> > R 4.0.0.0/8 [120/1] via 1.1.1.1, 00:00:10, Serial3/0.1
> > R* 0.0.0.0/0 [120/1] via 1.1.1.1, 00:00:10, Serial3/0.1
> >
> >
> > Rodney
> >
> > On Thu, Aug 05, 2004 at 02:02:12PM +0100, Sam Stickland wrote:
> > > Is there an RIP equivalent of BGP's 'neighbor default-originate'?
> > >
> > > (
> > >
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/iprrp_r/ip2_n1g.htm#wp1037042
> > > )
> > >
> > > In fact, a quick google search has just shown me that there is :)
> > >
> > >
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/np1_r/1rprt1/1rrip.htm#1017420
> > >
> > > Looks like this ought to do the trick:
> > >
> > > router rip
> > > default-information originate
> > >
> > > If it works like the bgp default-originate there's no need to have a
> > > default route on the borders for this to work.
> > >
> > > Sam
> > >
> > > On Thu, 5 Aug 2004, Marco Matarazzo wrote:
> > >
> > > > Hi all,
> > > >
> > > > I've a little question to ask about default routes and their
> redistribution
> > > > in RIP.
> > > >
> > > > Right now I've two border 7200s speaking eBGP with two ISPs, and iBGP
> > > > between them. The eBGP peers are full, without default. The internal
> router
> > > > now is an OpenBSD with zebra, taking participating in the iBGP peers.
> No
> > > > problems so far, zebra has the full routing tables, and knows how to
> route
> > > > packets in the world.
> > > > We're in the process of removing the OpenBSD router, and install some
> > > > 3550-48-SMIs as customer facing routers. They'll run RIP (it's SMI)
> with the
> > > > two borders, and redistribute the connected customer routes to them.
> Of
> > > > course those 3550s must also have a default route. And this is the
> problem.
> > > > I don't want to configure a couple of static ones, since it's all
> ethernet,
> > > > and the interfaces won't go down, and the backup default will never
> catch
> > > > in. Also I don't take default from the upstreams, so I must create one
> on
> > > > the borders. Connection to the upstreams is also ethernet, so no
> statics
> > > > here. From what I understand, I'll have to use the ip default-network
> > > > statement, but which network to use? Have you any suggestion?
> > > > Could I just take the network number of a couple large NAPs in the
> region,
> > > > hoping that they won't do a mantainance of the electrical panels in
> the same
> > > > hours of the same day? :)
> > > >
> > > > TIA!
> > > > ]\/[arco
> > > >
> > > > _______________________________________________
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> > > > https://puck.nether.net/mailman/listinfo/cisco-nsp
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> > > >
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