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Multiple Stack Links
From reading the "Multiple Stack Links" section of the S3300 User Manual, it sounds as though I can use two fiber connections to a 2nd switch to form a stack with 20GB bandwidth. I can also add two Ethernet connections to a 3rd switch. When trying to implement this and connect the first two switches together, only one fiber connection is active.
All stack ports are configured and running in Stack mode. I started up the 1st switch, connected the two fiber connections then started up the 2nd switch.
If I can get this first part going I'll then work on getting the Ethernet connections stacked. Thanks in advance for your help!
Wild guess from the road - don't we have to configure a LAG for each group of stack links?
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Wild guess from the road - don't we have to configure a LAG for each group of stack links?
Hi nathanr801,
Welcome to the community! :)
Just to add and hope this might help. It might be possible that the ethernet ports used for stacking are still set as Ethernet. To check this, log-in to the S3300 web-GUI, then go to System > Stacking > Advanced > Stack-port Configuration. In the Configured Stack Mode field, set it to Stack then apply it. A manual reboot of the switch is required for the changes to take effect. As reference, kindly read pages 85-86 of the S3300 user manual here about Advanced Stack-Port Configuration.
Regards,
DaneA
NETGEAR CommunityTeam
I just want to follow-up on this. We’d greatly appreciate your feedback.
Otherwise, if ever your concern has been addressed or resolved, I encourage you to mark the appropriate reply as the “Accepted Solution” so others can be confident in benefiting from the solution. The NETGEAR Community looks forward to hearing from you and being a helpful resource in the future!
Regards,DaneA
NETGEAR Community Team
I apologize for the delay. Because the switches are in production (using a single link) I have to schedule the downtime to test. I was hoping to do this last friday but was feeling under the weather so I wasn’t able to come in to perform the adjustment. I’m back to work now and am reviewing my calendar for a reschedule.
I sincerely appreciate the responses so far. The ports are both configured and running in stack mode so I am looking into the LAG suggestion. I hope to have results this week.
I apologize for the late response.
I'm preparing for the LAG test. If I understand the "Multiple Stack Links" section correctly, since the switches are currently connected with Fiber, I should be able to create a LAG with the Ethernet ports, connect the Ethernet cables, then disconnect the fiber link without down time.
Be reminded to use the two dedicated (non-combo) 10GBaseT copper links (ports) and not just any other ethernet port for stacking.
Let us verify this. First, set the 10GBaseT ports as LAG (ex. LAG 01) on both S3300 switches. Set the LAG Type as LACP and Hash Mode 3 (you may want also to try setting the LAG Type as Static). Make sure that the LAG state of the 10GBaseT ports on both S3300 switches shows Up. Then, verify if the LAG 01 shows up on the Stack Configuration.
As per page 89 of the S3300 user manual here, it says below:
The following restrictions and limitations apply when using Multiple Stack Links:
• Fiber link takes precedence over the copper link
• When fiber link is present between the stacked units, traffic is always carried through the fiber link, whether over a single link or over two links in a trunk.
- This happens irrespective of one or two copper links present
- Copper link, in the presence of fiber link, always acts as standby and does not participate in carrying traffic. However, when the fiber links are down/removed, the copper link becomes active and starts carrying traffic. This operation (known as switchover between the links) does not destabilize the stack.
While preparing the LAG, I ran into a question. Do I need an individual LAG on each speperate physical switch or can I add all four ports into a single LAG. As I link about this, it seems that each physical switch will need a LAG. Thoughts?
You can add a maximum of 8 ports in the LAG. As reference, read page 141 of the S3300 user manual here.
Regards,
DaneANETGEAR Community Team
This is now working. I had to create a LAG on each physical switch. For example, I created LAG1 with ports 49 and 50 on StackSwitch1. Then I created LAG2 with ports 49 and 50 on StackSwitch2. Then both ports would be active and able to be used for stacking.
Thanks everyone for the help!
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