[c-nsp] "ip unnumbered" with "ip address negotiated" on the same router

[Jon Lewis]

On Mon, 29 Oct 2007, Reuben Farrelly wrote:

> I've recently come across a case whereby an 877 router running 12.4(4)T7 I was
> looking at had:
>
> interface Dialer0
>  ip address negotiated
>
> interface Vlan1
>  ip address 203.123.155.233 255.255.255.248
>
> However the Dialer was being assigned the address 203.123.155.233 by the
> remote LNS.
>
> Has anyone else seen this done before, or is it known to have any ill effects?
>   There seems to be no problems apparent but then that doesn't imply that it
> is right and will survive IOS upgrades in the future ;-)

I've done it plenty.  IIRC, some DSL CPE doesn't support it, but cisco 
does.

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  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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