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modules/tasks/network-interfaces.nix: create network bridges with "forward delay" set to zero 

This change obsoletes the need to increase the IPv6 "router_solicitations" parameter.

svn path=/nixos/trunk/; revision=29493
This commit is contained in:
Peter Simons 2011-09-26 09:41:40 +00:00
parent 84a37365c2
commit 32d6a441a5
1 changed files with 3 additions and 8 deletions
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11
modules/tasks/network-interfaces.nix
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@ -214,19 +214,14 @@ in
echo "Creating bridge ${n}..."
${pkgs.bridge_utils}/sbin/brctl addbr "${n}"
# Set bridge's hello time to 0 to avoid startup delays.
${pkgs.bridge_utils}/sbin/brctl setfd "${n}" 0
${flip concatMapStrings v.interfaces (i: ''
${pkgs.bridge_utils}/sbin/brctl addif "${n}" "${i}"
ip addr flush dev "${i}"
'')}
# For some reason enslaving an interface to a bridge
# causes traffic to be blocked for a few seconds, long
# enough for IPv6 router solicitations to get lost.
# So increase the number of attemts.
${optionalString cfg.enableIPv6 ''
echo 5 > /proc/sys/net/ipv6/conf/${n}/router_solicitations
''}
# !!! Should delete (brctl delif) any interfaces that
# no longer belong to the bridge.
'')))}