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Following sysctl.conf settings at Xen host does not work:

net.bridge.bridge-nf-call-arptables = 0
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0

# sysctl -p

...
error: "net.bridge.bridge-nf-call-arptables" is an unknown key
error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key
error: "net.bridge.bridge-nf-call-iptables" is an unknown key

But bridge module is loaded:

# lsmod | grep bridge
bridge                 86778  0
stp                     1613  1 bridge
llc                     3721  2 bridge,stp
ipv6                  342149  50 bridge,nf_reject_ipv6,nf_conntrack_ipv6,nf_defrag_ipv6,[permanent]

What am I missing?

Kernel 3.18.20-2.el6xen.x86_64

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  • Hmm. sudo sysctl -a | grep net.bridge shows them on a stock RHEL 6.7 system. Perhaps related to the custom kernel? – thrig Aug 20 '15 at 0:00
  • None for me... it's official kernel, installed from centos's repositories, I swear! :) – Dmitry Aug 21 '15 at 22:45
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Falling back to 3.14.42-1.el6xen.x86_64 solved problem...

# sysctl -a | grep net.bridge
net.bridge.bridge-nf-call-arptables = 0
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
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