[c-nsp] IP unnumbered vlan subinterfaces question

[Aaron]

So you don't want to use another IP for loopback. Sorry, misunderstood.


On Mon, Aug 3, 2009 at 11:29, Aaron <dudepron at gmail.com> wrote:

> Loopback interfaces do not go down, so I'm not sure what benefit you are
> getting besides the ability to blackhole the 10.10.10.0/24 if the ethernet
> goes down.
>
>
> On Mon, Aug 3, 2009 at 11:09, Michael Ulitskiy <mulitskiy at acedsl.com>wrote:
>
>> Hello,
>>
>> Guys, are there any drawbacks of doing the following:
>>
>> interface Lo0
>>  ip address 10.10.10.1 255.255.255.0
>> !
>> interface FastEthernet0/0.1
>>  encapsulation dot1q 1 native
>>  ip unnumbered Lo0
>> !
>> ip route 10.10.10.0 255.255.255.0 FastEthernet0/0.1
>> !
>>
>> as opposed to having ip address configured directly on the interface as
>> usual?
>> I need that ip address to stay always up regardless of Fa0/0 state, 'cause
>> it's used for other services that should stay up
>> and I'd prefer to avoid assigning another ip address exclusively for
>> loopback use.
>> It seems to work in my lab, but I thought I'd better ask...
>>
>> Thanks,
>> Michael
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
>
>