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

[chooweikeong at pacific.net.sg]

Hi Felix, both router using ip classless. Rgds.

On Tue, 15 Feb 2005, [ISO-8859-15] Félix Izquierdo wrote:

> Are you using "ip classless" on both versions? Perhaps you was using 
> classfull routing on 12.0 ( I think the default for that version ).
>
>
> chooweikeong at pacific.net.sg wrote:
>
>> Hi Nick,
>> 
>> But how come the behaviour is different for the router running 12.0, which 
>> also has the 192.168.16.0/21 route?
>> 
>> Thanks,
>> Wei Keong
>> 
>> On Tue, 15 Feb 2005, Nick Shah wrote:
>> 
>> 
>>> 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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>> 
>> 
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