Re: Comments on RSVP-TE-06

[Rajaraman B <brajaram@npd.hcltech.com>]

Hi,
    But, When the label set is received in a Path message,
that incoming Label Set is Compared(intersection-as given in the draft)
against the downstream interface's set of label. That means, Incoming Label
Set is compared with set of labels of the interface through which the
Path message has come so that it can be used later while selecting
a label for GENERALIZED_LABEL object in the corresponding Resv message
which is sent through the interface the corresponding Path message has
come already.

Is it correct?

Thanks,
Rajaraman.B

Lou Berger wrote:

At 02:15 AM 12/11/2001, Rajaraman B wrote:
>Hi,
>     In the rsvp-te-06 draft, it has been written that "On reception of a
> Path message, the Label Set represented in the message is compared
> against the set of available labels at the downstream interface and the
> resulting intersecting Label Set is forwarded in a Path message.".
>
>My doubts are,
>1. Whether Downstream interface is with respect to Control Flow direction
>(direction of the Path message - Initiator to Terminator) or with respect
>to Data Flow direction (Terminator to Initiator - that is, direction of
>LSP path from Terminator to Initiator in the case of bidirectional LSP set
>up using UPSTREAM_LABEL)

upstream (as always) = towards sender of path message

>2. if the terminalogy "upstream and downstream" is with respect to Control
>Message flow direction, then whether Label Set object is used to restrict
>the Label Range for establishing upstream LSP(from Terminator to
>Initiator) path using UPSTREAM_LABEL or only for downstream LSP(Initiator
>to Terminator) path using GENERALIZED_LABEL or Both (for upstream LSP and
>downstream LSP)

generalized label.  upstream label is selected by the upstream node, so
such restriction makes no sense.

Lou

>Thanks,
>Rajaraman. B
>