Hi Matt where can I find the exact alghorithm for the load balancing decision ?
I see two host on the same subnet (Storage replication) are using the same link. I read that the command "port-channel load-balance src-dst-mixed-ip-port" could cause from secs to mins of traffic loss... I cannot try it :-( Cheers 2016-07-23 0:53 GMT+02:00 Mack McBride <[email protected]>: > With some traffic patterns there isn't much you can do. > If there are very few source and destination addresses then you may not be > able to > Distribute the traffic. Especially for long lived flows. > > Try 'port-channel load-balance src-dst-mixed-ip-port' if you are on code > that supports it. > Also ensure you have 'port-channel load-balance per-module'. > You already found the adaptive knob. > Adaptive is more difficult to troubleshoot when there are issues. > > You may also want to set 'mls ip cef load-sharing full'. > > Mack McBride | Senior Network Architect | ViaWest, Inc. > O: 720.891.2502 | C: 303.720.2711 | [email protected] | > www.viawest.com > > > -----Original Message----- > From: cisco-nsp [mailto:[email protected]] On Behalf Of > james list > Sent: Friday, July 22, 2016 1:45 AM > To: [email protected] > Subject: [c-nsp] Issue with port-channel hashing > > Dear experts, > > I need help. > > > On my C6500 sup720 (12.2(33)SXI5) I’ve a port channel 4 x 1Gbs with 1 Gbs > full and hashing fixed. > > On the port-channel I’m trunking with few L2 vlans and on top of one of > those I’ve L3 (with OSPF). > > > Since hashing is fixed all the traffic that 6500 Asic has decided to send > on that link is experiencing problems. > > > My questions: > > > 1) Which is the faster and safer way to detect the “guilty” (src/des > tip) ? I see accounting seems not working > > 2) What if I would change hashing from fixed to adaptive ? any detail > on that ? I'm not able to find how it works in detail on cisco.com > > > An help is appreciated, > > > Cheers > > James > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > This message contains information that may be confidential, privileged or > otherwise protected by law from disclosure. It is intended for the > exclusive use of the addressee(s). Unless you are the addressee or > authorized agent of the addressee, you may not review, copy, distribute or > disclose to anyone the message or any information contained within. If you > have received this message in error, please contact the sender by > electronic reply and immediately delete all copies of the message. > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
