RE: draft-minei-mpls-ldp-planned-restart-00.txt & draft-ali-ccamp-rsvp-hello-gr-admin-00.txt

["zafar ali" <zali@cisco.com>]

<snip>
>
>>          SPs don't like to see RSVP Hello running even when there is 
>> no application requiring them.
>
>Could you please describe scenario(s) where you would have 
>RSVP Hello running "even when there is no application requiring them".
>
>Yakov.
>

Hi Yakov, 

Here is a scenario: 

1. You start without any application that require RSVP Hellos. 
--> You will see RSVP Hellos are NOT running. 

2. You enable an application (GR/ FRR) requiring RSVP Hellos. 
--> You will see RSVP Hellos start running. 

So far so good :-) 

3. You disable application requiring RSVP Hello. 
--> One would expect RSVP Hellos to stop but they keeps running :-( If
one side stops replying to RSVP Hello, it would cause traffic disruption
for LSPs that depend on the health of the Hello session. The only way to
get around this limitation is to continue to run Hellos. 

Furthermore, the draft also formalizes procedure for disabling RSVP GR.
Hence in these respect the problem space for
draft-minei-mpls-ldp-planned-restart-00.txt &
draft-ali-ccamp-rsvp-hello-gr-admin-00.txt is the same.  IMO both drafts
address a similar but useful need in operation of networks. 

Like we mentioned in CCAMP WG meeting, we are open to the solution for
administrative shut-down of RSVP Hellos. My comment for
draft-minei-mpls-ldp-planned-restart-00.txt to make the text more
generic as a way to enable/ disable LDP/ GR on the fly. Ina, et al may
like to consider this comment. 

Thanks

Regards... Zafar