From: Richard Gallagher (rgallagh@cisco.com)
Date: Sat Jan 14 2006 - 01:34:52 GMT-3
Nothing to worry about, it was added to the IOS code when a bug was
fixed. Later 12.2 and all 12.3 onwards will see this message, don't
worry about it :)
Rich
Chad Patterson 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
>>
>>
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