From: loke (loke14@gmail.com)
Date: Fri Jan 13 2006 - 12:23:33 GMT-3
Its normal.
Nick
On 1/13/06, Chad Patterson <cpatterson@summithealth.org> wrote:
>
> After I have redistributed all desired routes and attained universal
> connectivity, I enable debug ip routing.
>
> Last week I would have said,
> If I see routes being added / deleted, that indicates there is a
> problem.
> I am expecting to see no output from the debug ip routing command,
> unless I actually do something to cause a route to be added or deleted.
>
>
> There seems to be an exception to this rule, or I need some
> clarification concerning my debug output,
>
> In some versions of code, when you have a default route, debug ip
> routing will give you a message like the one below every 60 seconds.
>
> R1#
> *Mar 1 00:38:19.063: RT: NET-RED 0.0.0.0/0
> *Mar 1 00:38:19.063: RT: NET-RED queued, Queue size 1
>
> Since I don't see this affecting traffic, I am assuming it is
> informational and would like to move on.
>
> If this is the sign of a real problem, I would like to understand what
> is causing the problem and fix it.
>
>
> My initial assumption was that if everything is stable, I will not see
> anything when I enable debug ip routing.
> Is this an exception, and is anyone aware of other exceptions?
>
>
> Regards,
>
> Chad
>
> >>> loke <loke14@gmail.com> 1/12/2006 9:36 PM >>>
> R1 is receiving the default route because of the nssa area type you
> configured. The reason you are seeing that output the route add, is
> because
> you have debug ip routing turned on.
>
> Nick
>
>
>
>
> On 1/12/06, Chad Patterson <cpatterson@summithealth.org> wrote:
> >
> > I found someone else having this same problem when I searched the
> group
> > study archives.
> > Unfortunately, this was after two hours of troubleshooting, and
> writing
> > this email.
> > So here is the email, and a link to the groupstudy string.
> >
> > I would welcome an actual explanation of "why" this problem happens,
> > but I am just glad some else has seen it.
> >
> >
> > Here is my original problem,
> >
> > R1 is receiving 0.0.0.0/0 from R4
> >
> > I have enabled debug ip routing on R1,
> > I get this message every minute,
> >
> > R1#
> > *Mar 1 00:38:19.063: RT: NET-RED 0.0.0.0/0
> > *Mar 1 00:38:19.063: RT: NET-RED queued, Queue size 1
> >
> > I have tried every debug I can think of,
> > I do not have any (noticable) reachability issues.
> > I have reloaded all routers.
> > I am unable to determine the exact meaning of, RT: NET-RED
> 0.0.0.0/0
> > I can't see the route leaving the routing table. I never see RT: add
> /
> > delete
> > I have tried different combinations of the area nssa command.
> > I shut down all other interfaces,
> > I disabled cdp on all routers, ODR is not running,
> >
> > Is there any chance RT: NET-RED 0.0.0.0/0, is not a bad thing?
> >
> >
> > R1
> > router ospf 40
> > area 25 nssa
> > network 172.16.241.1 0.0.0.0 area 25
> > !
> >
> > R4
> > router ospf 40
> > area 25 nssa no-redistribution no-summary
> > network 172.16.241.4 0.0.0.0 area 25
> >
> >
> > R1#u all
> > All possible debugging has been turned off
> > R1#
> > R1#debu ip routin
> > R1#debu ip routing
> > IP routing debugging is on
> > R1#
> > *Mar 1 00:38:19.063: RT: NET-RED 0.0.0.0/0
> > *Mar 1 00:38:19.063: RT: NET-RED queued, Queue size 1
> > R1#
> > *Mar 1 00:39:19.063: RT: NET-RED 0.0.0.0/0
> > *Mar 1 00:39:19.063: RT: NET-RED queued, Queue size 1
> > R1#
> > *Mar 1 00:40:19.063: RT: NET-RED 0.0.0.0/0
> > *Mar 1 00:40:19.063: RT: NET-RED queued, Queue size 1
> > R1#
> >
> > R1#sho ip ospf database <Text Ommitted>
> > Summary Net Link States (Area 25)
> > Link ID ADV Router Age Seq# Checksum
> > 0.0.0.0 172.16.104.1 1272 0x80000002 0x00C34B
> > R1#
> >
> >
> > R1#sho ip route
> > O*IA 0.0.0.0/0 [110/65] via 172.16.241.4, 00:46:44, Serial0/0.1
> >
> >
> >
> >
> > This seems to be related to the default route itself?
> > R4 sends the route,
> > I see no debug ip routing messages from R4
> >
> > Both R1 and R2 at different IOS versions see this every minute,
> >
> > R1 ver-12.2(15)T
> > R1#
> > *Mar 1 00:40:19.063: RT: NET-RED 0.0.0.0/0
> > *Mar 1 00:40:19.063: RT: NET-RED queued, Queue size 1
> >
> > R2 ver-12.4(5)
> > R2#
> > *Apr 24 08:54:48.459: RT: NET-RED 0.0.0.0/0
> >
> >
> >
> > Here is what I found in the Archives,
> >
> > http://shop.groupstudy.com/archives/ccielab/200507/msg01062.html
> >
> > RE: NET-RED every 60 seconds posted 07/22/2005
> >
> > Crazy or not, after removing a static default route pointing to
> remote
> >
> > ISDN, it stopped (I previously removed ospf and bgp, but no change).
> >
> > Then I tested other static routes. Just default route causes it.
> > Pointing
> > to ISDN or remote serial IP, it causes the 60 second message. It is
> > 12.2T
> > - precisely C2600-J1S3-M, Version 12.2(15)T5.
> >
> > I tought it was some instability on the IGP/BGP. But now there is no
> > routing protocol, just a defaut static route, confirming that this
> > cause
> > the behavior. I reloaded the router, and it is still there.
> >
> > Thanks
> >
> > Gladston
> >
> >
> _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
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