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authorHannes Frederic Sowa <hannes@stressinduktion.org>2014-09-02 15:49:26 +0200
committerDavid S. Miller <davem@davemloft.net>2014-09-04 22:26:14 -0700
commita9fe8e29945d56f35235a3a0fba99b4cf181d211 (patch)
tree54ad0e07c0f0d789abc31517256e43ad5ae878d6 /Documentation/networking
parent2f711939d2ea9dfaecebecd1324d2ec7a7a21f65 (diff)
ipv4: implement igmp_qrv sysctl to tune igmp robustness variable
As in IPv6 people might increase the igmp query robustness variable to make sure unsolicited state change reports aren't lost on the network. Add and document this new knob to igmp code. RFCs allow tuning this parameter back to first IGMP RFC, so we also use this setting for all counters, including source specific multicast. Also take over sysctl value when upping the interface and don't reuse the last one seen on the interface. Cc: Flavio Leitner <fbl@redhat.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Flavio Leitner <fbl@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking')
-rw-r--r--Documentation/networking/ip-sysctl.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index cfc71ac0f764..db2383cb1df9 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -844,6 +844,11 @@ igmp_max_memberships - INTEGER
conf/all/* is special, changes the settings for all interfaces
+igmp_qrv - INTEGER
+ Controls the IGMP query robustness variable (see RFC2236 8.1).
+ Default: 2 (as specified by RFC2236 8.1)
+ Minimum: 1 (as specified by RFC6636 4.5)
+
log_martians - BOOLEAN
Log packets with impossible addresses to kernel log.
log_martians for the interface will be enabled if at least one of

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