Messages in this thread | | | Date | Fri, 23 Dec 2011 09:42:06 +0000 | From | Chris Boot <> | Subject | igb + balance-rr + bridge + IPv6 = no go without promiscuous mode |
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Hi folks,
As per Eric Dumazet and Dave Miller, I'm opening up a separate thread on this issue.
I have two identical servers in a cluster for running KVM virtual machines. They each have a single connection to the Internet (irrelevant for this) and two gigabit connections between each other for cluster replication, etc... These two connections are in a balance-rr bonded connection, which is itself member of a bridge that the VMs attach to. I'm running v3.2-rc6-140-gb9e26df on Debian Wheezy.
When the bridge is brought up, IPv4 works fine but IPv6 does not. I can use neither the automatic link-local on the bridge nor the static global address I assign. Neither machine can perform neighbour discovery over the link until I put the bond members (eth0 and eth1) into promiscuous mode. I can do this either with tcpdump or 'ip link set dev ethX promisc on' and this is enough to make the link spring to life.
This cluster is not currently live so I can easily test patches and various configurations.
The relevant parts of /etc/network/interfaces:
iface bond0 inet manual slaves eth0 eth1 bond-mode balance-rr bond-miimon 100 bond-downdelay 200 bond-updelay 200
iface br0 inet static address [snip] netmask 255.255.255.224 bridge_ports bond0 bridge_stp off bridge_fd 0 bridge_maxwait 5 iface br0 inet6 static address [snip] netmask 64
lspci: 02:00.0 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01) 02:00.1 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01)
These use the 'igb' driver.
Thanks, Chris
-- Chris Boot bootc@bootc.net
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