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bonding: Send more than one gratuitous ARP when slave takes over

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With IPoIB, reception of gratuitous ARP by neighboring hosts
is essential for a successful change of slaves in case of failure.
Otherwise, they won't learn about the HW address change and need
to wait a long time until the neighboring system gives up and sends
an ARP request to learn the new HW address.  This patch decreases
the chance for a lost of a gratuitous ARP packet by sending it more
than once. The number retries is configurable and can be set with a
module param.

Signed-off-by: Moni Shoua <monis@voltaire.com>
Acked-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Moni Shoua
2008-05-17 21:10:12 -07:00
committed by Jeff Garzik
parent 8047637c70
commit 7893b2491a
3 changed files with 60 additions and 4 deletions
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drivers/net/bonding/bonding.h
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@@ -125,6 +125,7 @@ struct bond_params {
int mode;
int xmit_policy;
int miimon;
int num_grat_arp;
int arp_interval;
int arp_validate;
int use_carrier;