The MPLS WG Archive

[suchauhan@hss.hns.com]

hi Mareline!
     IMHO Nodal faults is a genre of faults that include both the data and
control path failure. The case of just the control path failing shall be a
special case of a Nodal fault.

     Generally the signalling protocols are so designed that they should come to
know immediately of the node (control plane) going down and take corrective
action. Whether the data plane is up or not is I guess irrelevant for the
corrective action as     there is no reliable means to determine this (as the
control path is down).

best regards,
sumit




Mareline Sheldon <marelines@yahoo.com> on 09/17/2002 02:49:46 PM

To:   mpls@UU.NET
cc:    (bcc: Sumit Chauhan/HSS)

Subject:  Nodal Fault




Hi,
As i understand, the Nodal faults belong to the genre of faults wherein the
control plane at
the node fails while all the data plane connections are maintained. This could
be if the
reachability to the neighbouring nodes is lost, or the control processor fails
or after a
restart or RSVP daemon crashes.

Can there be any other scenario when this may happen i.e control plane
information is lost but
data plane is still preserved.

regards,
mareline s.



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