layer-2 failover without any special features on the switch level.
after recent hang of on of switches i’d like to improve reliability of connectivity within a server rack.
i already have all servers connected to two different switches… now it’s time for automated failover.
i’m experimenting with interface teaming in active-backup mode.
that’s my /etc/network/interfaces:
auto bond0 iface bond0 inet manual slaves eth0 eth1 bond_mode active-backup bond_primary eth0 bond_arp_interval 1000 bond_arp_ip_target 192.168.0.10 10.16.10.1 auto bond0.22 iface bond0.22 inet static address 192.168.0.11 netmask 255.255.255.0 auto bond0.11 iface bond0.11 inet static address 10.16.10.177 netmask 255.255.255.0 gateway 10.16.10.1
.. and so far it seems to work fine in the test lab
failure is not detected by the link status [ that would be quite useless – during my last hang all switche’s ports were up ], instead it sends arp-who-has to group of hosts defined in bond_arp_ip_target
20110606 – interestingly option that worked for me fine underl lenny:
no longer works for me under squeeze. if i set it bond shows status of both interfaces as down.
20141023 – setup as described above has been working fine for years in production using the following topology: