[c-nsp] Different behaviour for static route on different IOS?

[Nick Shah]

It is  'recursive routing', and its perfectly legit these days. I think
it may have been around 12.0 & 12.1 days.

rgds

-----Original Message-----
From: Tim Bulger [mailto:timb at phreakocious.net] 
Sent: Tuesday, 15 February 2005 2:52 PM
To: Nick Shah; chooweikeong at pacific.net.sg; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] Different behaviour for static route on different
IOS?


Since when could you have a static route with a next hop which is not on
a network directly connected to the router?! 

Confused,
Tim

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Nick Shah
Sent: Monday, February 14, 2005 7:39 PM
To: chooweikeong at pacific.net.sg; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] Different behaviour for static route on different
IOS?

That's because even though the 'specific' 192.168.16.48/30 is on
Serial5/0 which is shutdown, there is a 'summary/aggregate' prefix
192.168.16.0/21 being learnt from GigabitEthernet0/1

If you want to know for sure do a show ip route 192.168.16.48
255.255.255.252 and it will indeed tell you that its "not in routing
table"

rgds

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
chooweikeong at pacific.net.sg
Sent: Tuesday, 15 February 2005 2:04 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Different behaviour for static route on different IOS?


Hi All,

Realise that there is a different behaviour for static route (next-hop
to an interface ip) on IOS 12.3 and 12.0.

As shown below, i've a static route next-hop to an interface ip, and the

interface has been shutdown. For 12.0, the static route is not active,
but for 12.3, the static route is active, even though the interface is
down.

Is this a 'new' feature? Since when is this feature introduced?

Appreciate your feedback.

Thanks,
Wei Keong


IOS Ver 12.3(10)
----------------

Serial5/0.1/1/3/1:8   192.168.16.49  YES manual administratively down
down

ip route 10.0.200.120 255.255.255.252 192.168.16.50


>sh ip route 10.0.200.120
Routing entry for 10.0.200.120/30
   Known via "static", distance 1, metric 0
   Redistributing via ospf 10
   Advertised by ospf 10 subnets
   Routing Descriptor Blocks:
   * 192.168.16.50
       Route metric is 0, traffic share count is 1


>sh ip route 192.168.16.50
Routing entry for 192.168.16.0/21, supernet
   Known via "ospf 10", distance 110, metric 20, type extern 2, forward
metric 1
   Last update from 10.9.1.6 on GigabitEthernet0/1, 6d22h ago
   Routing Descriptor Blocks:
   * 10.9.1.6, from 192.168.3.6, 6d22h ago, via GigabitEthernet0/1
       Route metric is 20, traffic share count is 1


IOS Ver 12.0(22)
----------------
Serial6/3             192.168.16.49  YES manual administratively down
down

ip route 10.0.200.120 255.255.255.252 192.168.16.50

>sh ip route 10.0.200.120
% Subnet not in table

>sh ip route 192.168.16.50
Routing entry for 192.168.16.0/21, supernet
   Known via "ospf 10", distance 110, metric 20, type extern 2, forward
metric 1
   Last update from 10.9.1.6 on GigabitEthernet0/3, 6d22h ago
   Routing Descriptor Blocks:
   * 10.9.1.6, from 192.168.3.6, 6d22h ago, via GigabitEthernet0/3
       Route metric is 20, traffic share count is 1

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 this communication or disclose anything about it.

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