BOUNCE ccamp@ops.ietf.org: Non-member submission from ["BhaskaraP" <bhaskarap@rediffmail.com>] (fwd)

[Kireeti Kompella <kireeti@juniper.net>]

Message from non-subscriber.

---------- Forwarded message ----------
Date: 9 Jul 2003 17:16:00 -0000
From: "Bhaskara P" <bhaskarap@rediffmail.com>
Reply-To: "Bhaskara P" <bhaskarap@rediffmail.com>
To: kireeti@juniper.net, , yakov@juniper.net
Cc: mpls@uu.net, , ccamp@ops.ietf.org, , gmpls-ops@mplsrc.com
Subject: unnumberted ERO and RRO

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Hi Kireeti and Yokov,=0D=0A=0D=0AWhenever I read RFC 3477(Signalling Unnumb=
ered Links in Resource ReSerVation Protocol - Traffic Engineering (RSVP-TE)=
), it leaves me in more confusion than clarification.  If we have a simple =
topology of 3 node LSP like below,=0D=0A=0D=0A     Interfaces    1         =
2        3         4=0D=0A            Node A ----------- Node B -----------=
 Node C=0D=0A=0D=0ARFC 3477 suggests one can do ERO signalling from ingress=
 Node A in either of the following formats=0D=0A=0D=0A  format 1:   ERO wit=
h Router ID and out going interface Id of Node=0D=0A=0D=0A              <Ro=
uter Id of A>, <Interface 1>=0D=0A              <Router Id of B>, <Interfac=
e 3>=0D=0A=0D=0A  format 2:   ERO with Router ID and in coming interface of=
 the Node=0D=0A=0D=0A              <Router Id of B>, <interface 2>=0D=0A   =
           <Router Id of C>, <interface 4>=0D=0A=0D=0A1) If the above state=
ment is true, how should RRO for this LSP be encoded  i.e., in format 1 or =
format 2?. =0D=0A=0D=0A2) Which format  should the ingress node A, receive =
RRO object?   =0D=0A=0D=0A3) Is RRO always seen by ingress Node A, should b=
e always in the format of ERO singalled by ingress.  i.e., if ingress node =
singalls ERO in format 1, then it should recieve RRO in same format. or RRO=
 should follow always format 1 irrespective of ERO format.=0D=0A=0D=0AThese=
 formats are very important to inter-op between vendors. Can any please cla=
rify the above issues and how the RRO and ERO inerop between the vendors ac=
hieved?=0D=0A=0D=0Athank you=0D=0Abhaskara=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=
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