Re: [mpls] Last Calls on P2MP LSP Ping and Enhanced DS Map

[Shivakumar Channalli <[e-mail]>]

|> 1. precluding bud node support
Another way is to try to solve bud node issue in case of PHP 

|> 2. bud node receiving duplicate traffic (label and unlabeled)
|> Cheers.
Receiving unlabelled packet in case of PHP can be solved by following a
simple rule.

"In p2mp LSP case, if a node (other than pure egress) receives a +MPLS
LSP trace packet+, without any label, then we should drop the packet
without processing"

Reason: In trace route mode we want packets to reach control plane due
to TTL expiry, but in PHP p2mp mode packets are also received by bud
nodes due the PHP. As a result we can make an assumption that, the
packet received by control plane is not due to TTL expiry, and drop the
packets.


...$hiv



|-----Original Message-----
|From: Santiago Alvarez (saalvare) [mailto:[e-mail]]
|Sent: Saturday, May 29, 2010 6:03 AM
|To: Nitin Bahadur; Shaleen Saxena (ssaxena); Shivakumar Channalli
|Cc: [e-mail]; Santiago Alvarez (saalvare)
|Subject: RE: [mpls] Last Calls on P2MP LSP Ping and Enhanced DS Map
|
|It seems to me that, in order to find PHP acceptable for P2MP LSPs, one
|the these two need to be acceptable:
|1. precluding bud node support
|2. bud node receiving duplicate traffic (label and unlabeled)
|Cheers.
|
|SA
|--
|> -----Original Message-----
|> From: [e-mail] [mailto:[e-mail]] On Behalf
|Of
|> Nitin Bahadur
|> Sent: Friday, May 28, 2010 4:52 PM
|> To: Shaleen Saxena (ssaxena); Shivakumar Channalli
|> Cc: [e-mail]
|> Subject: Re: [mpls] Last Calls on P2MP LSP Ping and Enhanced DS Map
|>
|>
|> Shaleen,
|>
|> > I was referring to
|> > http://tools.ietf.org/html/draft-ietf-mpls-rsvp-te-no-php-oob-
|> > mapping-04
|>
|> This draft does not say that PHP *must not* be used ever for RSVP
|P2MP.
|> This draft specifies a requirement for non-PHP behavior and solves
|that
|> problem.
|>
|> > . Do you have an application where you use PHP? Is P2MP TE
|> > with PHP going to be deployed in service provider networks?
|>
|> Yes...we have customers (in deployment) using P2MP with PHP.
|>
|> nitin
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