[lkml]   [2001]   [Aug]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Poor Performance for ethernet bonding
Ben Greear wrote:
> Couldn't the bonding code be made to distribute pkts to one interface or
> another based on a hash of the sending IP port or something? Seems like that
> would fix the reordering problem for IP packets.... It wouldn't help for
> a single stream, but I'm guessing the real world problem involves many streams,
> which on average should hash such that the load is balanced...

Cisco etherchannel does this, by XOR'ing the dest address with the
source address, AND'ing with # of interfaces (limiting you to a power of
2), and then using the number to determine what channel to use.

Now, you end up in a 4 way Etherchannel, all the traffic going down one
channel, and the none going down the other three. Does that sound like
a balanced solution?

Most bonding problems are either the card driver is busted, the card is
busted (el-cheapo NE2000 PCI clones are really bad..) or the switch
can't handle it. Most cheap, dumb switches break big time when using
Bonding with them.

Thomas Davis | ASG Cluster guy |
(510) 486-4524 | "80 nodes and chugging Captain!"
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:58    [W:0.076 / U:0.476 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site