From: William Manley <william.manley@youview.com>
To: <netdev@vger.kernel.org>
Subject: IGMP Unsolicited Report Interval too long for IGMPv3?
Date: Mon, 22 Jul 2013 21:43:57 +0100 [thread overview]
Message-ID: <51ED998D.7000300@youview.com> (raw)
If an IGMP join packet is lost you will not receive data sent to the
multicast group so if no data arrives from that multicast group in a
period of time after the IGMP join a second IGMP join will be sent. The
delay between joins is the "IGMP Unsolicited Report Interval".
In the kernel this seems to be hard coded to be chosen randomly between
0-10s. In our use-case (IPTV) this is too long as it can cause channel
change to be slow in the presence of packet loss.
I would guess that this 10s has come from IGMPv2 RFC2236, which was
reduced to 1s in IGMPv3 RFC3376.
There was a thread about this on linux-rdma in 2010 in the context of IP
over Infiniband but it seems no patches got applied as a result of the
discussion:
http://www.mail-archive.com/linux-rdma@vger.kernel.org/msg05740.html
Would the right patch reducing the unsolicited report interval for
IGMPv3 be acceptable now?
Thanks
Will
next reply other threads:[~2013-07-22 20:44 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-22 20:43 William Manley [this message]
2013-07-22 21:09 ` IGMP Unsolicited Report Interval too long for IGMPv3? Ben Hutchings
2013-07-24 13:38 ` [PATCH] net: igmp: Reduce Unsolicited report interval to 1s when using IGMPv3 William Manley
2013-07-24 13:45 ` William Manley
2013-07-24 14:51 ` Sergei Shtylyov
2013-07-25 12:14 ` [PATCH 1/2] " William Manley
2013-07-25 12:14 ` [PATCH 2/2] net: igmp: Allow user-space configuration of igmp unsolicited report interval William Manley
2013-07-26 16:36 ` Hannes Frederic Sowa
2013-07-29 14:21 ` [PATCH v3 1/2] net: igmp: Reduce Unsolicited report interval to 1s when using IGMPv3 William Manley
2013-07-29 14:21 ` [PATCH v3 2/2] net: igmp: Allow user-space configuration of igmp unsolicited report interval William Manley
2013-07-30 6:14 ` Hannes Frederic Sowa
2013-07-30 23:55 ` David Miller
2013-07-31 6:34 ` Hannes Frederic Sowa
2013-07-31 9:47 ` William Manley
2013-08-06 18:03 ` IGMP Unsolicited report interval patches William Manley
2013-08-06 18:03 ` [PATCH v4 1/3] net: igmp: Reduce Unsolicited report interval to 1s when using IGMPv3 William Manley
2013-08-07 0:45 ` Hannes Frederic Sowa
2013-08-07 13:43 ` Benjamin LaHaise
2013-08-06 18:03 ` [PATCH v4 2/3] net: igmp: Don't flush routing cache when force_igmp_version is modified William Manley
2013-08-07 0:45 ` Hannes Frederic Sowa
2013-08-07 13:43 ` Benjamin LaHaise
2013-08-06 18:03 ` [PATCH v4 3/3] net: igmp: Allow user-space configuration of igmp unsolicited report interval William Manley
2013-08-07 1:00 ` Hannes Frederic Sowa
2013-08-07 13:43 ` Benjamin LaHaise
2013-08-07 1:03 ` IGMP Unsolicited report interval patches Hannes Frederic Sowa
2013-08-08 9:01 ` Hannes Frederic Sowa
2013-08-09 18:28 ` David Miller
2013-07-31 5:07 ` [PATCH v3 2/2] net: igmp: Allow user-space configuration of igmp unsolicited report interval Bill Fink
2013-07-29 21:34 ` [PATCH v3 1/2] net: igmp: Reduce Unsolicited report interval to 1s when using IGMPv3 Hannes Frederic Sowa
2013-07-26 16:32 ` [PATCH " Hannes Frederic Sowa
2013-07-26 16:39 ` Hannes Frederic Sowa
2013-07-29 14:39 ` William Manley
2013-07-29 14:56 ` Hannes Frederic Sowa
2013-07-22 21:18 ` IGMP Unsolicited Report Interval too long for IGMPv3? Benjamin LaHaise
2013-07-22 21:51 ` Hannes Frederic Sowa
2013-07-25 23:42 ` David Miller
2013-07-26 13:11 ` Benjamin LaHaise
2013-07-26 15:06 ` Hannes Frederic Sowa
2013-07-26 15:15 ` Benjamin LaHaise
2013-07-22 22:06 ` Lukas Tribus
2013-07-22 22:30 ` Hannes Frederic Sowa
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