Shankar,
I am just trying to think aloud here:
If there is an LSP passing through the router, it
comes into interface A, goes out of interface B,
the RSVP reservation is only on interface B, is this
right? If so, how could we guarantee interface A will
have enough bandwidth for the tunnel, since its
bandwidth could be less than the outbound interface B.
Thanks
JUN
--- Shankar Vemulapalli <svemulap@cisco.com> wrote:
> There is no need to reserve on inbound ...
>
> The path message goes out asking for reservation
> followed by resv message coming back either
> confirming or not.
> Once we receive the confirmation, we guarantee the
> reservation on the outgoing interface...
>
> So, the ingress traffic could be IP and doesn't
> have any reservation associated with it ... It
> now can get label switched on the outgoing interface
> because we have an LSP which is set up with some
> bandwidth guarantees...
>
> So, why do we need to make reservation on inbound
> interface ??
>
> Am I missing something ??
>
> Thanks,
>
> /Shankar
>
> At 2:13pm 05/01/02 -0700, JUN wrote:
> > Shankar,
> >
> > I understand that it is for simplex traffic, but
> it
> > takes two interfaces to handle a reservation, an
> > inbound and an outbound, why it is only necessary
> to
> > make reservation at outbound?
> >
> > Thanks
> > JUN
> >
> > --- Shankar Vemulapalli <svemulap@cisco.com>
> wrote:
> > > Well, as per the RFC2205 -
> > >
> > > " RSVP requests resources for simplex flows,
> i.e.,
> > > it requests
> > > resources in only one direction.
> > > "
> > >
> > > You may want to look into this RFC for more
> > > information
> > > as to how RSVP works...
> > >
> > > Also, look into RFC 3209 - (if you need further
> > > info.)
> > >
> > > Thanks,
> > >
> > >
> > > /Shankar
> > >
> > > At 1:06pm 05/01/02 -0700, JUN wrote:
> > > > I noticed that when an LSP passing through a
> > > router,
> > > > RSVP only reserves bandwidth of the outbound
> > > > interface, why it doesn't make reservation at
> > > inbound?
> > > >
> > > > Thanks
> > > > JUN
>
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