Hi
I don't think IGP LSA's have any such field which
tells signalling protocol is enabled or not.
( Note that it can even be LDP not necessarly
RSVPTE )
Ashwin
-----Original Message-----
From:
Gopinath G - CTD, Chennai. [mailto:gopinathg@ctd.hcltech.com]
Sent: Tuesday, February 05, 2002 10:40 AM
To: mpls@UU.NET
Subject: RE: non-RSVP
routers.
Hello,
I hope LSA's of IGP may help to find the
next hop is RSVP capable or
not...
pls corect me if I am wrong
gopinathg
-----Original Message-----
From:
schultz@io.iol.unh.edu [mailto:schultz@io.iol.unh.edu]
Sent: Saturday, February 02, 2002 11:53 PM
To: Subhakar K S
Cc: mpls@UU.NET
Subject: Re: non-RSVP routers.
Hello,
Please see the last paragraph in RFC 2205, section 3.8:
"With normal IP forwarding, RSVP can detect a non-RSVP hop by
comparing
the IP TTL with which a Path message is sent
to the TTL with which it is
received; for this
purpose, the transmission TTL is placed in the common
header. However, the TTL is not always a reliable indicator of
non-RSVP
hops, and other means must sometimes be
used. For example, if the routing
protocol uses
IP encapsulating tunnels, then the routing protocol must
inform RSVP when non-RSVP hops are included. If no automatic
mechanism
will work, manual configuration will be
required."
However, RSVP-TE will not work with non-RSVP routers.
Please see section
4.2.5 of RFC 3209.
Thanks,
-Ben
On Fri, 1 Feb 2002, Subhakar K S wrote:
>
> How does an intermediate
router finds if its
> downstream router is RSVP
aware or not.
>
>
> thanks,
> S.
>
>
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