From: John <linux@8192•net>
To: netdev@vger•kernel.org
Cc: andy@greyhouse•net
Subject: [PATCH 2/2] bonding: Doesn't support IPv6
Date: Fri, 28 Oct 2011 18:18:39 -0700 [thread overview]
Message-ID: <4EAB546F.3060800@8192.net> (raw)
--- a/Documentation/networking/bonding.txt 2011-09-01 12:15:38.000000000 -0700
+++ b/Documentation/networking/bonding.txt 2011-09-26 10:23:43.000000000 -0700
@@ -709,12 +709,22 @@
protocol information to generate the hash.
Uses XOR of hardware MAC addresses and IP addresses to
- generate the hash. The formula is
+ generate the hash. The IPv4 formula is
(((source IP XOR dest IP) AND 0xffff) XOR
( source MAC XOR destination MAC ))
modulo slave count
+ The IPv6 forumla is
+
+ iphash =
+ (source ip quad 2 XOR dest IP quad 2) XOR
+ (source ip quad 3 XOR dest IP quad 3) XOR
+ (source ip quad 4 XOR dest IP quad 4)
+
+ (iphash >> 16) XOR (iphash >> 8) XOR iphash
+ modulo slave count
+
This algorithm will place all traffic to a particular
network peer on the same slave. For non-IP traffic,
the formula is the same as for the layer2 transmit
@@ -735,19 +745,30 @@
slaves, although a single connection will not span
multiple slaves.
- The formula for unfragmented TCP and UDP packets is
+ The formula for unfragmented IPv4 TCP and UDP packets is
((source port XOR dest port) XOR
((source IP XOR dest IP) AND 0xffff)
modulo slave count
- For fragmented TCP or UDP packets and all other IP
- protocol traffic, the source and destination port
+ The formula for unfragmented IPv6 TCP and UDP packets is
+
+ iphash =
+ (source ip quad 2 XOR dest IP quad 2) XOR
+ (source ip quad 3 XOR dest IP quad 3) XOR
+ (source ip quad 4 XOR dest IP quad 4)
+
+ ((source port XOR dest port) XOR
+ (iphash >> 16) XOR (iphash >> 8) XOR iphash
+ modulo slave count
+
+ For fragmented TCP or UDP packets and all other IPv4 and
+ IPv6 protocol traffic, the source and destination port
information is omitted. For non-IP traffic, the
formula is the same as for the layer2 transmit hash
policy.
- This policy is intended to mimic the behavior of
+ The IPv4 policy is intended to mimic the behavior of
certain switches, notably Cisco switches with PFC2 as
well as some Foundry and IBM products.
reply other threads:[~2011-10-29 1:18 UTC|newest]
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