George
> -----Original Message-----
> From: George Swallow [mailto:swallow@cisco.com]
> Sent: Friday, March 08, 2002 10:24 AM
> To: Peter Willis
> Cc: erosen@cisco.com; ccamp@ops.ietf.org; swallow@cisco.com
> Subject: Re: Tunnels v. circuits was Re: MPLS OAM & the IETF
>
>
> > And the difference betwenn IP tunnels and circuits would be?
>
> At the service level not much except that ordered delivery cannot be
> assumed.
>
> But in between the end points -
>
> A circuit has a static (fixed) route, IP is dynamic.
>
> Intermediate nodes carrying a circuit usually have state associated
> with those circuits, IP nodes have no such state.
MPLS LSPs have state associated with the LSPS on the intermediate
nodes. Seem like a case for circuit based diagnostics for MPLS!
Don
>
> So in terms of diagnostics they are vastly different.
>
> ...George
>
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>
>