Date: Wed, 2 Mar 2005 17:40:13 -0500 From: "Michael G. Jung" <mikej@confluenttech.com> To: <lister@primetime.com>, <dgilbert@dclg.ca> Cc: freebsd-performance@freebsd.org Subject: ng_fec and cisco 2931 Message-ID: <9D7F0DF3FB16D41184010050DA90E00001C874BB@neo.confluentasp.local>
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Sorry, not subscribed but here go's.... To quote cisco http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a0= 080094646.shtml "EtherChannel load balancing can use either MAC addresses or IP = addresses. Also, EtherChannel load balancing can use either source or = destination, or both source and destination, addresses. The mode that = you select applies to all EtherChannels that you have configured on the = switch." On older switches that I deployed this on, say the 5000 seriers which = was based on MAC address only, on a Nx100 channel between two hosts = throughput could never exceed "N". So 4x100Mbit links between two hosts = would never exceed 100Mbit but multiple connections across the = connection would aggregate.=20 In other words etherchannel does not load balance per packet across = bonded ethernet connections but per connection. Try running tests to = multiple hosts from your FreeBSD box and see if you don't aggregate = above 100Mbit total.... Hope this is helpful. I'd be very curious to know if you find this is your issue. Kind regards, --mikej Michael Jung
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