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тАО10-20-2009 05:52 PM
тАО10-20-2009 05:52 PM
Load balancing using Aggregated Links (LACP)
Is it possible to load balance traffic using LACP trunk links.
For example I am running two 2910al's and I would like to create a 4Gbps trunk link in between them.
Is it possible to load balance traffic on that trunk port?
Thanks for the replies
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тАО10-21-2009 12:14 AM
тАО10-21-2009 12:14 AM
Re: Load balancing using Aggregated Links (LACP)
LACP is a trunking prot. it automaticlly load balance traffic between trunked ports but not equally, it uses something called conversation which depends on the source address and destination address of the packet, each unique SA/DA will be forwarded to one of the ports and all the traffic from the same SA/DA will take the same bath, and so on for other SA/DA combination.
for the configuration use this
#trunk
note that, the links must be with the same speed and duplex and connected to the same switches directly
If you need any other information please let me know.
Regards,
Islam Hassan
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тАО10-21-2009 04:31 PM
тАО10-21-2009 04:31 PM
Re: Load balancing using Aggregated Links (LACP)
Not that it helps here specifically, but some end-systems trunking implementations can be configured to define a flow as anything from SA/DA pair through src/dst IP to full TCP (or UDP) four-tuple of local/remote IP + local/remote port.
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тАО10-21-2009 05:10 PM
тАО10-21-2009 05:10 PM
Re: Load balancing using Aggregated Links (LACP)
All the users have gigabit speeds and I have a four gig trunk that connects to the first switch.
The first switch contains all my servers and resoureces I don't want my users to experience any slowdowns accessing any resources. So I assume this 4 GB link will improve network performance.
All my users are on different VLAN(s) as well. Is this 4GB trunk port good enough should I look into something else? and I configured the trunk to use LACP.
Thanks again for all the help
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тАО10-21-2009 05:22 PM
тАО10-21-2009 05:22 PM
Re: Load balancing using Aggregated Links (LACP)
How many servers (aka server MAC addresses) do you have?
If there are "enough" of each then the law of large numbers suggests things should be happiness and joy.
Unless I have high avialability concerns, I *personally* prefer to to up one level in link speed rather than aggregate (at least when possible), but then I get all my networking equipment internally.
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тАО10-21-2009 05:45 PM
тАО10-21-2009 05:45 PM
Re: Load balancing using Aggregated Links (LACP)
I have roughly 60 users and 10 main servers. I want the best performance out of my switches as possible what would you recommend?
All ports are running gigabit speeds
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тАО10-21-2009 05:53 PM
тАО10-21-2009 05:53 PM
Re: Load balancing using Aggregated Links (LACP)
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тАО10-23-2009 06:05 AM
тАО10-23-2009 06:05 AM
Re: Load balancing using Aggregated Links (LACP)
SA/DA pairs is all we get...
and i would agree that based on your system, a 4G trunk should improve traffic flow as well as provide for "backup" in the event you had a link (or 2) failure...
and as always, more is better ;-)
hth...jeff
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тАО10-23-2009 06:26 AM
тАО10-23-2009 06:26 AM
Re: Load balancing using Aggregated Links (LACP)
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тАО10-23-2009 06:55 AM
тАО10-23-2009 06:55 AM