Re: [Pce] Remaining BRPC last call comment

[Mach Chen <mach at huawei.com>]

Hi JP and Adrian,
       
On 2008-04-02, at 04:12:44 JP Vasseur wrote:

>Hi Adrian,
>
>
>[snip]
>
>> 
>> So, I think that PCEP needs to be able to indicate the sequence of domains
>> that should be traversed.
>
>The easy way to handle this is by using the IRO object specified in PCEP. I
>can add: 
>
>"The sequence of domains to be traversed MAY be encoded in the IRO so that
>it is available to all PCEs."

As Adrian pointed out:"A PCE may serve more than one domain." , and I am not sure whether there are multiple PCEes may serve one domain(for HA or load balance reason). If my assumption is reasonable, I am afriad just using the IRO is not the best idea. Becasue, just based on the IRO, for a specific PCE, how does it accurately know which domain(s) it should serve? 
For example:there are three domains(d1,d2,d3) and three PCEs(PCE1,PCE2,PCE3), PCE1 serves d1, PCE2 could serve d2 and d3, and PCE3 also could serve d2 and d3, for such condition, how does BRPC work? 

>
>The additional ability to indicate the sequence of
>> PCEs is a great supplement.
>
>Which can be done thanks to the PCE-ID object defined in
>draft-ietf-pce-monitoring.
>
>Thanks.
>
>Cheers.
>
>JP.
>
>> 
>> 
>
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Best regards,			
Mach Chen


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