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Commit d85560a6 authored by Leigh B Stoller's avatar Leigh B Stoller

A fix from Ryan, setting rp_filter sysctl variable to zero. See

lengthy comment in the code (text from Ryan).
parent 20b53909
......@@ -322,6 +322,20 @@ sub vz_rootPreConfig {
# packets on the veths?
mysystem("sysctl -w net.core.netdev_max_backlog=2048");
# Ryan figured this one out. It was causing 75% packet loss on
# gre tunnels.
# According to Ryan: 'loose' mode just ensures that
# the sender's IP is reachable by at least one interface, whereas
# 'strict' mode requires that it be reachable via the interface
# the packet was received on. This is why the ARP request from
# the host was being dropped; the sending IP was only reachable
# via veth999, not the internal greX interface where the request
# was received.
mysystem("sysctl -w net.ipv4.conf.default.rp_filter=0");
# make sure the initscript is going...
if (system("$VZRC status 2&>1 > /dev/null")) {
mysystem("$VZRC start");
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