Commit e12b4539 authored by Flavio Leitner's avatar Flavio Leitner Committed by David S. Miller

bonding: fix to rejoin multicast groups immediately

The IGMP specs states that if the system receives a
membership report, it shouldn't send another for the
next minute. However, if a link failure happens right
after that, the backup slave and the switch connected
to this slave will not know about the multicast and
the traffic will hang for about a minute.

This patch fixes it to rejoin multicast groups immediately
after a failover restoring the multicast traffic.
Signed-off-by: default avatarFlavio Leitner <>
Signed-off-by: default avatarDavid S. Miller <>
parent 5a37e8ca
......@@ -1269,14 +1269,14 @@ void ip_mc_rejoin_group(struct ip_mc_list *im)
if (im->multiaddr == IGMP_ALL_HOSTS)
if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) {
igmp_mod_timer(im, IGMP_Initial_Report_Delay);
/* else, v3 */
im->crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
/* a failover is happening and switches
* must be notified immediately */
if (IGMP_V1_SEEN(in_dev))
igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT);
else if (IGMP_V2_SEEN(in_dev))
igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT);
igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT);
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment