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Message-ID: <4F4E2F1D.2080302@gmail.com> Date: Wed, 29 Feb 2012 21:58:53 +0800 From: WeipingPan <panweiping3@...il.com> To: Jiri Bohac <jbohac@...e.cz> CC: Jay Vosburgh <fubar@...ibm.com>, Andy Gospodarek <andy@...yhouse.net>, netdev@...r.kernel.org Subject: Re: [PATCH][RFC] bonding: delete migrated IP addresses from the rlb hash table On 02/28/2012 01:34 AM, Jiri Bohac wrote: > Bonding in balance-alb mode records information from ARP packets > passing through the bond in a hash table (rx_hashtbl). > > At certain situations (e.g. link change of a slave), > rlb_update_rx_clients() will send out ARP packets to update ARP > caches of other hosts on the network to achieve RX load balancing. > > The problem is that once an IP address is recorded in the hash > table, it stays there indefinitely [1]. If this IP address is > migrated to a different host in the network, bonding still sends > out ARP packets that poison other systems' ARP caches with > invalid information. I met this problem, too. > This patch solves this by looking at all incoming ARP packets, > and checking if the source IP address is one of the source > addresses stored in the rx_hashtbl. If it is, the corresponding > hash table entries are removed. Thus, when an IP address is > migrated, the first ARP broadcast by its new owner will purge the > offending entries of rx_hashtbl. > > (a simpler approach, where bonding would monitor IP address > changes on the local system does not work for setups like: > HostA --- NetworkA --- eth0-bond0-br0 --- NetworkB --- hostB > and an IP address migrating from HostB to HostA) Could you explain in detail or step by step how to reproduce your problem ? I made a patch but I do not know whether it can fix your problem. thanks Weiping Pan -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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