SG500X LAG 40G possible

[onyXMaster]

Hi!

Is it possible to create a 40G LAG over S1+S4 switches between two SG500X in standalone mode (no stacking)?

Thanks   

[trgood · Accepted solution]

I don't have the capability to test this as I don't have the required SFP modules however based on the information in the Admin guide as long as all the Ports in the LAG have the same media type this should be possible.

However, if you are using 2 SG500X switches it may be a better idea just to stack them.  (Granted I believe you could only get a max of 20G between the switches then).

-Trent Good

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[onyXMaster]

Thank you for the response. We currently stack the switches, but it _seems_ (we didn't do enough testing to be sure) that with two cables (SFP-H10GB), the stacking link is still only 10G (the second link is used as a ring topology failover element). If it would be 20G it would be enough for our needs.

[Tom Watts · Accepted solution]

Hi Arist, yes this is possible. However you likely will never achieve 40 gig throughput. Even most internet backhauls uses 10 gig links.

If you set up a lag even for 20 gigs, you'd likely never reach even a 10 gig mark by time the data finished transferring, there wouldn't be a realistic way to test if it works however it is configurable.

-Tom
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[onyXMaster]

Thank you, Tom! These switches are used as LAN ones and we have some pretty heavy throughput (for this class of hardware ofc) using teamed/bonded NICs between app servers and DBs, so we occasionally hit the 8G mark (our previous switches had a static 8-port 1G trunk) so I wanted to be sure if we could have some headroom after the upgrade.

[Tom Watts · Accepted solution]

I tested this configuration last year when the 500x first came out. I was able to generated about 4 gigs of traffic at best on a 20 gig lag but thats with a lack of resources to do more. That was using the 1.2.9.77 firmware. I haven't tested it on the newer softwares.

-Tom
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[onyXMaster]

Very interesting, Tom, it looks like we should test for this specifically. Thanks for sharing your experience.