[c-nsp] IP Cache logs and BGP

Rodney Dunn rodunn at cisco.com
Mon Oct 11 12:54:03 EDT 2004


Hmm...not sure then.

If you do 'clear ip cache' do they come
right back the same way?
You can do "debug ip cache' to see them
being built.

Rodney

On Thu, Oct 07, 2004 at 11:25:31PM +0530, Amol Sapkal wrote:
> On Thu, 7 Oct 2004 09:18:18 -0400, Rodney Dunn <rodunn at cisco.com> wrote:
> > Are se 11/1/1 2 and 0 your ISP connections?
> > 
> 
> Yes, they load balance my default route.
> 
> > What does sh ip route 12.2.51.0 say?
> > 
> 
> Subnet not in table
> 
> > It could be, and does look to me
> > like it's a bug with how the fastcache is getting
> > populated.
> > 
> 
> Doesnt seem so, coz I have another edge running the same version, is
> of same make, and it shows the next hop proper for all such unknown
> networks (it shows my default route)
> 
> > What code?
> > 
> 
> Version 12.2(11)T8,  RELEASE SOFTWARE (fc1)
> 
> > You running CEF on this box?
> > 
> 
> Yes. Not distributed cef though.
> 
> 
> > Rodney
> > 
> > 
> > 
> > On Thu, Oct 07, 2004 at 09:16:01AM +0530, Amol Sapkal wrote:
> > > Hi Guys,
> > >
> > > I am running BGP with a couple of upstream providers who give me the
> > > routes for most of the destination networks.
> > >
> > >
> > > My 'sh ip cache' output shows the below:
> > >
> > > 12.2.51.0/30            00:04:50  Se11/1/1        12.2.51.2
> > > 12.2.55.0/30            00:08:49  Se11/1/1        12.2.55.2
> > > 12.2.73.132/30          00:00:34  Se11/1/2        12.2.73.134
> > > 12.2.142.8/30           00:09:42  Se11/1/1        12.2.142.9
> > > 12.2.169.20/30          00:02:33  Se11/1/1        12.2.169.23
> > > 12.2.209.48/30          00:14:25  Se11/1/0        12.2.209.50
> > > 12.3.7.0/30             00:00:21  Se11/1/1        12.3.7.2
> > > 12.3.10.128/30          00:02:12  Se11/1/0        12.3.10.130
> > > 12.3.126.28/30          00:23:28  Se11/1/0        12.3.126.30
> > > 12.3.145.32/30          00:33:01  Se11/1/1        12.3.145.33
> > > 12.3.206.0/30           00:15:17  Se11/1/0        12.3.206.3
> > > 12.4.27.40/30           00:10:40  Se11/1/0        12.4.27.40
> > > 12.4.81.144/30          00:19:33  Se11/1/0        12.4.81.146
> > > 12.4.124.0/30           00:03:44  Se11/1/0        12.4.124.3
> > > 12.4.124.4/30           00:16:44  Se11/1/1        12.4.124.4
> > > 12.4.184.4/30           00:26:48  Se11/1/2        12.4.184.5
> > > 12.4.184.20/30          00:02:00  Se11/1/1        12.4.184.20
> > > 12.4.211.56/30          00:08:21  Se11/1/2        12.4.211.59
> > > 12.4.218.40/30          00:05:33  Se11/1/0        12.4.218.42
> > > 12.4.218.128/30         00:17:32  Se11/1/0        12.4.218.130
> > > 12.4.254.8/30           00:06:52  Se11/1/1        12.4.254.10
> > >
> > >
> > > I am no way related to the 12.x.x.x network ( I get many many /30
> > > networks of 62.x.x.x, 63.x.x.x.x, 69.57.x.x to which I am no way
> > > related directly)
> > >
> > > I understand the column one could be the accessed networks. But then,
> > > the last column (4th) shows me the Next hop IP which has utterly
> > > nothing to do with my network.
> > >
> > > I may be wrong in my interpretation of the Next-Hop column, pls help
> > > to clarify the above behaviour.
> > >
> > > Is it normal?
> > >
> > >
> > >
> > > --
> > > Warm Regds,
> > >
> > > Amol Sapkal
> > >
> > > --------------------------------------------------------------------
> > > An eye for an eye makes the whole world blind
> > > - Mahatma Gandhi
> > > --------------------------------------------------------------------
> > > _______________________________________________
> > > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > > archive at http://puck.nether.net/pipermail/cisco-nsp/
> > 
> 
> 
> -- 
> Warm Regds,
> 
> Amol Sapkal
> 
> --------------------------------------------------------------------
> An eye for an eye makes the whole world blind 
> - Mahatma Gandhi
> --------------------------------------------------------------------


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