The MPLS WG Archive

["abhay" <abhay@multitech.co.in>]

Kiril,
       Actually when you create a tunnel as an interface the tunnel id for
the tunnel is the unique combination of source
       address and the interface index provided by the Interfaces MIB(assume
a module).
       Tunnels which are not interfaces have a different way of assigning
the tunnel id which means that when u have a
        tunnel which is not an interface you have a definite outgoing
interface over which u have the connection identifier
        assigned.
        In this case before you transmit the data packet there is a check
which verifies if there is a established tunnel for a
        particular destination by using a lookup table(say at the ingress)
and the packet is put on that outgoing interface attached         to the
tunnel.
        Yes,the contents of the FEC to NHLFE and LSR MIB greatly help in
this mechanism.
         Hope this interpretation helps.
         Regards,
         Abhay.
----- Original Message -----
From: Kiril Shulga <kiril@galileo.co.il>
To: abhay <abhay@multitech.co.in>
Cc: <mpls@UU.NET>
Sent: Wednesday, October 10, 2001 2:35 PM
Subject: Re: MPLS Tunnel interface


> Hi Abhay,
>
> The questions are below:
>
> abhay wrote:
>
> > Kiril,
> >         You create tunnels which are not interfaces if you are going to
have
> > a router management running with
> >          various IGP's running and they can attach the tunnel for a
> > destination at runtime based on decision.
>
> Attaching tunnel means defining ifIndex for it? That is non-interface
tunnel
> turns to tunnel which is interface?
>
> >          Tunnels which are interfaces have an extra registration with
the
> > Interfaces MIB.Which implies that they can
> >          be used in routing calculations,where the tunnel is the next
hop.
> >          Hope this helps
> >          Regards,
> >          Abhay
> > ----- Original Message -----
> > From: Kiril Shulga <kiril@galileo.co.il>
> > To: <mpls@UU.NET>
> > Sent: Wednesday, October 10, 2001 1:11 PM
> > Subject: MPLS Tunnel interface
> >
> > > Hi!
> > > I've few questions related to MPLS TE-MIB:
> > >
> > > In which purpose it's created tunnel that isn't interface
> > > (mplsTunnelIsIf = FALSE)?
> > > How redirect traffic to such tunnel?
> > >
> > > Thanks in advance,
> > > Kiril
> > >
>
> Regards,
> Kiril
>