Unsolved
This post is more than 5 years old
2 Posts
0
51643
May 4th, 2011 05:00
Load balancing with powerconnect 5324
Hello,
I have some problems with load balancing. I configured lacp on the switch and on the server. I want to load balance with 4 x 1gigabit broadcom(netxtreme 5709c). So i made a team and try to copy some data to another server. But al the data is going over one port.
Can anyone please tell me how to configure lacp or some other load balancing configuration?
This is what I did already on the switch:
Normal 0 21 false false false NL X-NONE X-NONE
- console# configure
- console(config-if)# interface range port-channel all
- console(config-if)# shutdown
- console(config-if)# interface range ethernet g(1-4)
- console(config-if)# channel-group 1 mode auto (add those ports to LAG 1 (of 8), and use the LACP protocol to configure the LAG)
- console(config-if)# int range port-channel 1
- console(config-if)# no spanning-tree disable
- console(config-if)# flowcontrol on
- repeat the above on the partner switch and it’s LAG ports
- console(config-if)# no shutdown
Hope somebody can help me!
0 events found
No Events found!
nosebreaker
13 Posts
1
May 10th, 2011 21:00
Ok, so when you bond multiple NIC's together like this, the max speed for one connection is still 1gb. I know, it seems like it should be 4gb since you have 4 ports together. To get the full 4gb, in the real world (in my experience), you'd need at least 8 different servers connecting to the server at 1gb each (which would slow down to about 450-500MB/s each). It has to do with the way the switch is going to balance the connections. See it won't use the 2nd NIC until it thinks the first is being used fully. Most of the time the default weighing method is going to be source based, and since it is coming from one server it won't use more than 1 physical port.
I use iperf for testing network throughput (its available for linux and windows), run it in server mode on your 4gb server and in client mode on at least 4 other machines and see if the total is over that 1gb limit.
patrick911
2 Posts
0
May 11th, 2011 00:00
Ok, that sounds logical to me. But I have another server with 2NIC's teamed as one link of 2gb. Should it go faster if I copy files between that two servers?
If I understand you, load balancing is not really load balancing it only works when you use the full bandwith from different servers?
Thanks for your reply!
nosebreaker
13 Posts
1
May 11th, 2011 08:00
No I don't think so, the fastest will still be 1gb per connection. I don't know if you could get more than that with 2+ connections between the servers. You can try it with iperf and see if it works.