#10 arp ping failover problem

[Laurent CADET]

arp ping failover doesn't work for me.
I can see arp requests and replies,
but no failover happens when an interface
stops receiving replies.

modprobe bonding arp_interval=60 arp_ip_target=10.0.1.1
ip li set up bond0
ip ad ad 10.0.1.10/24 dev bond0
ifenslave bond0 eth1 eth2

eth1 and eth2 are 3c59x nics.

please help.

[Nobody/Anonymous]

Logged In: NO

kernel newbie, but I found the way myself :

in /usr/src/linux/drivers/net/bonding/bond_main.c :

2002/9/30 - Dan Eisner <eisner at 2robots dot com>

* - make sure my_ip is set before taking down the link,
since

* not all switches respond if the source ip is not set.

and you know what ?
my_ip is never set in function bond_loadbalance_arp_mon !
in failover test, just replace "&& my_ip" by "&& !my_ip",
then "make", "make modules_install".

short, clean, working.

[Jay Vosburgh]

Logged In: YES
user_id=579170

Reversing the sense of the test will work if your switch
responds to ARP packets from the all zeroes IP address. A
more complete fix is to add the my_ip gleaning into the
loadbalance path.

The my_ip test is correct the way it is (if my_ip is set
correctly); it makes the link always stay up if the switch
isn't responding to all zeros ARP requests, which should
normally be a temporary situation until my_ip is filled in.