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

[chooweikeong at pacific.net.sg]

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