Actually, this is a very common practice with carriers--they sell you a pipe
of so many Kbps and it's up to you how you want to carve it up. They set up
one VC in side their network and they switch all cells with the same VPI
value to the appropriate destination. This gives you a lot of flexibility.
If you want to set up two VCs with two distinct traffic contracts to ensure
that two protocols, say, for instance IP and IPX, do not step on each
others' toes, you can do this. If the carrier would have set up a channel
instead of a path, they would have to set up a separate VC--more management
on their part.
In your case, however, I would take one precaution--don't use VCI values
less than 32 (0-31). These are reserved for management purposes. I've seen
some issues with the old Cascade switches where sometimes this would cause
problems with your VC--the Cascade switch, instead of passing them
transparently through the network, tried to process them, causing the
customer all kinds of problems.
Hope this helps!
Enjoy!
Richard Deal
[EMAIL PROTECTED]
* Author of the following Coriolis books: CCNP Switching Exam Cram, CCNP
Remote Access Exam Prep, and CCNP Cisco Lan Switch Configuration; as well as
a CCNP test author for www.equizware.com
""David Chandler"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Sounds like they are giving you a PVP. (permanent virtual path) If that
> is true then they are correct whatever VCI you choose at the source will
> be the same VCI at the destination. In other words the Sprint ATM
> switches will not switch based on the VCI info in the cell header; it
> will only look at the VPI info.
>
> I am suprised that the carriers would be giving out PVPs. That sounds
> like the same mentality which was used when they were giving out IP
> address ranges. (If you have more than 100 users, you can have a Class A
> address)
>
> DaveC
>
>
> Kim Seng wrote:
> >
> > To the ATM guru,
> >
> > I have a ATM WAN via SPRINT from the HQ (Chicago) to 4
> > regional branch office (LA, FL, NY and CO).
> > The PVC infomations that SPRINT provides to me after
> > the circuit installation completed has only the
> > Originating VPI and Terminating VPI. There are no
> > information about the VCI. They said I can pick
> > any number for the VCI. This is new to me. Can someone
> > tell me that is true? I thought to configure
> > PVC you need both the VPI/VCI that must match with the
> > ingress ATM switch.
> >
> > Many thanks in advance.
> >
> > Kim.
> >
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