Stephen,
If you have 30 Async Ports that your wanting to bundle together......What
you would
do; would be in configuration mode would be to type the following
router(config)#interface group-async X
X = Whatever you want to give it.....
router(config-if)#group-range YY-YY
Y = # of tty/async ports that your wanting to bundle to this interface
Then you can setup the << ip unnumbered loopback Z >> to look at
the IP Address of the Loopback interface......
Hope this Helps.....
-jek-
"Stephen Skinner" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> Many thanks chaps......that has haelped a lot...
> another question though is :-
>
> if i have 30 async ports on an access server,
> assign the same loopback interface to all 30 ports
> set all ports to unmumbered
> and have only IP address ........can this work????/and if so how does it
> tell the different ports????
>
> i`m guessing it just uses the port number ....IF it works
>
>
> many thanks
>
> steve
>
> >From: "Atif Awan" <[EMAIL PROTECTED]>
> >Reply-To: "Atif Awan" <[EMAIL PROTECTED]>
> >To: "Stephen Skinner" <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>
> >Subject: RE: BCRAN Loopback int
> >Date: Tue, 12 Sep 2000 17:13:27 +0500
> >
> >
> >You define a loopback interface using the global configuration mode
> >command:
> >
> >int loopback 0
> >
> >It immediately creates a virtual interface which is by default in the
up/up
> >state. This interface does not depend on other things ( like keepalives,
> >clocking, physical cable connectivity ) to remain in the up/up state and
> >remains up as long as the router is up and running.
> >
> >Take OSPF for example. In order for OSPF to function properly it requires
a
> >Router ID which is the highest IP address of an active interface on the
> >router. In case you have loopback interfaces configured then the highest
ip
> >address amongst those of the loopback interfaces will be chosen as the
> >router ID. The advantage you get is that if the Router ID is the ip
address
> >of a physical interface and the interface goes down then the OSPF
operation
> >is interrupted. However, if the Router ID is that of a loopback interface
> >then the OSPF operation will never get interrupted as long as the router
> >itself does not go down and a router going down is very uncommon as
> >compared
> >to an interface going down.
> >
> >BGP is another routing protocol that makes use of this advantage of the
> >loopback interface.
> >
> >I hope this clears up things a bit.
> >
> >Regards
> >Atif
> >
> >-----Original Message-----
> >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> >Stephen Skinner
> >Sent: Tuesday, September 12, 2000 4:35 PM
> >To: [EMAIL PROTECTED]
> >Subject: BCRAN Loopback int
> >
> >
> >Chuck,Altif,Priscilla.....save me.....
> >
> >it says in my book BCRAN
> >
> >"a loopback interface is a virtual interface that never goes down
> >,therefore
> >it is an ideal line to use as the reference when using the ip unnumbered
> >command"
> >
> >i don`t understand ... a loopback interface dosen`t go
> >anywhere????...how,why would i reference this ....Can i have a real world
> >example as i don`t seem to understand WHY i would do this....
> >
> >sorry i`m being a bit thick
> >
> >thanks to ALL in advance
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