[c-nsp] /31 network

James Slepicka cisco-nsp at slepicka.net
Wed Jul 2 10:07:36 EDT 2008


/31s work fine here for IOS gear.  I can confirm that the ASA does not 
support them.  It's been a while since I last tried but, if I remember 
correctly, you can configure an interface with a /31, but it won't pass 
traffic nor will it be obvious what the problem is.

Justin Shore wrote:
> It works fine here.  I use it for all my infrastructure links between 
> Cisco gear (and only Cisco gear).  More specifically IOS devices.  I 
> don't believe FWSMs, IDSMs, ASAs, etc have support for it.  I never 
> tried but I'd seriously doubt it.
>
> Justin
>
> Vikas Sharma wrote:
>> Hi,
>>
>> has anyone used /31 network instead of /30? I believe this is 
>> recommended to
>> use /31 network? Need expert comments.
>>
>> Regards,
>> Vikas Sharma
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