Subject: What do you set Max Resp Time field in IGMPv3 G & G-S queries?

From: Mladen Sablic <[email-masked]>
Date: Fri, 28 Sep 2001 17:55:43 +0100

Hi,

From draft-ietf-idmr-igmp-v3-07.txt

[LMQI] = Last Member Query Interval
[LMQI] = Last Member Query Count
[MRT]  = Maximum Response Time in Memb. Query Message.
[QRV]  = Querier Robustness Variable in Memb. Query Messsages.

Section 6.6.3 IGMPv3-07 draft specifies that:
   - the group or source timer is lowered by [LMQI].
   - queries are retransmitted [LMQC-1] times WITHIN the
     [LMQI] period.

Period between retransmissions is left unspecified...
is there a reason?

Hence, I also have following questions:-

1. What do you set the [MRT] in the group & group-source
   specific V3 query messages?

    Assuming retransmission period [LMQI]/[LMQC],
    should [MRT] = [LMQI]/[LMQC==QRV].
  
2. In 6.6.1 How does the non-querier calculate LMQI when
it receives a query with Suppress Router-Side Processing
flag not set?

Is it:
   if (QRV==0)
        lower timer to own configured LMQI 
   else
        lower timer to [QRV]*[MRT]
        (both values from the packet).

Regards,

Mladen

<[email-masked]> UK IP Development