The MPLS WG Archive

["Navin" <navin@empowertel.com>]

Hi Folks,

>John ,
>
>The resv message doesn't contain session attribute object and hence you
>don't know the setup and holding priorities of the LSP. These are available
>in the path message and hence Call admission should be done during path
>message.

In any case, Once your LSP is 'setuped', the setup priority doesn't have any
meaning.
And the only priority which will be used is the holding priority.

A quick question. If you are implementing RFC2212 i.e GS, how would you
accomodate
R, if R > r. Considering that you would have already accepted the session
while
processing the Path message.

Anyway, Read RFC2209 and get the first hand info on RSVP message processing.

Have a nice weekend.

Over & out.

Navin

>
>When there is not enough resources available to support the LSP, you can
>find out how much is allocated to lower priority LSPs and based on that you
>can generate the AdSepc. These lower priority must be preempted only when
>you get the resv message.
>
>-sundara
>
>-----Original Message-----
>From: John Sparr [mailto:johnrdb@yahoo.com]
>Sent: Friday, August 04, 2000 11:18 AM
>To: Navin
>Cc: mpls@UU.NET
>Subject: RE: resource preemption
>
>
>Hi Navin,
>
>It should be that Resv message triggers this compare.
>But why the draft says "When a path message is
>considered for admission"?(section 4.8.3) It seems
>when a node received a Path message it checks if the
>bandwidth is avialable. I think the bandwidth request
>should be in Resv message. is that right?
>
>
>Regards,
>John
>
>--- Navin <navin@empowertel.com> wrote:
>> Hi There,
>>
>> First of all, you carry out admission control check
>> while
>> processing the RESV message NOT PATH message.
>>
>> Secondly, admission control check will be done at
>> all the nodes
>> EXCEPT the receiver node as there you really don't
>> reserve
>> anything.
>>
>> Hope this helps,
>>
>> Cheers,
>> Navin
>>
>>
>> -----Original Message-----
>> From: owner-mpls@UU.NET [mailto:owner-mpls@UU.NET]On
>> Behalf Of John
>> Sparr
>> Sent: Friday, August 04, 2000 9:30 AM
>> To: mpls@UU.NET
>> Subject: resource preemption
>>
>>
>> Hi,
>>
>> Quick question on resource preemption from RSVP-TE.
>>
>> In section 4.8.3, it says when a new Path message is
>> considered for admission, the bandwidth requested is
>> compared with the bandwidth at the priority
>> specified
>> in the Setup Priority.
>>
>> My question is who will do this compare,
>> intermidiate
>> nodes or receiver?
>>
>>
>> Thanks in advance
>> John
>>
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>
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