The MPLS WG Archive

[Yuan Gu <yuangu@ipinfusion.com>]

Bin Zhou wrote:

> Thanks. Senthil.
>
> In the quadruple (Src, Dst, Tunnel, LSP-id) you mentioned, the Src can be
> provided either by Extended Tunnel ID field or Tunnel Sender Address field.
>
> Can I use one of the two fields as a FEC for a host address since there
> isn't a FEC element in RSVP-TE?

Bin:

Are you trying to send FEC information to intermediate/egress node? FEC is only
known by ingress node when packets need to be classified for LSPs. In
intermediate and egress node, the only way to identify the LSP tunnel in data
plane is LABEL.

Regards!
Yuan


>
>
> BTW, I read that guys of fast reroute or route protection are redefining the
> Tunnel Sender Address.
>
> Regards,
> Bin
>
> > Extended Tunnel ID was *ment* as an additional key to specify the
> tunnel/lsp
> > between two nodes. This is in addition to the (Src, Dst, Tunnel, LSP-id)
> > quadruple.
> >
> > A popular way to fill this field is to use the src IP address of the LSP.
> > However, this behavior is not mandatory.
> >
> > Regards,
> > Senthil.