08-01-2018 07:13 AM - edited 03-08-2019 03:47 PM
Can I connect two servers with Dual 10Gbps NICs to the 10G ports on the switch and set up lacp for both using a src-dst-port (Load distribution on the source XOR destination TCP/UDP port) algorithm.
At the end each server should be able to communicate with each other at 20G and with all other clients on the 1G ports?
08-02-2018 08:42 AM
Yes, this should be possible. The 10Gbps ports are considered uplinks, but there is nothing special about them and they can be used as you suggest. Obviously, relevant L2 and L3 config has to be correct. Please also note the usual port-channel limitation that any one flow can only go over one link, so one connection (e.g. an ftp transfer) will only get to 10Gbps, not 20Gbps.
Hope this helps.
08-02-2018 09:47 AM
Thanks,
I wanted to make sure the 4948E supported src-dst-port lacp in the 10G ports so that connections running between different ports on the two servers would be distributed across the two links.
08-03-2018 12:29 AM
I can't say that I specifically remember put that command into a 4948E, but the command references can be found here:
... and the latest one shows that "port-channel load-balance src-dst-port" is supported. I haven't checked earlier versions.
Hope this helps.
08-03-2018 02:36 AM
Hello,
Load-balancing method is a matter of IOS features and ether-channel configuration. More details could be found here:
Also you may need to look at specific IOS release notes (depends what version you are using):
Also, keep in mind that total throughput for both servers would be 20 Gbps, however one TCP stream will not exceed 10 Gbps speed. If rest of your clients are connected to the same switch with 1 Gbps uplinks, yes it is possible, however keep in mind that in best case scenario there could be no more that 20 clients utilizing 1 Gbps connection speed per server.
08-03-2018 06:24 AM
08-03-2018 06:12 AM
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