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VLAN traffic between switches
We have three Netgear GS724T switches which have served well for some years. Model Name - GS724Tv4 Boot Version - B1.0.0.4 Software Version - 6.3.1.11 Now for the first time we need to impleme...
Hi snoworkin
I got the root cause for your problem.
It's due to wrong topology and configuration.
1. For inter-link cable between switches, you connect two cables between HLEWSW and HLEMSW, four cables between HLEMSW and HLWWSW, this will cause loop and STP protocol will blocking some ports traffic.
2. Suggest only connect one cable between switches if the Bandwidth is enough(if not, you can band two ports in LAG), then the inter-link port untag to VLAN1(by default) and tag to other VLANs(102, 254).
After do above two changes, it will work fine on your topology.
Could you please try again?
Hope it helps!
Regards,
EricZ
Model Name - GS724Tv4
Boot Version - B1.0.0.4
Software Version - 6.3.1.11
While I await help and guidance from Netgear people, and having tried everything I can think of over the weekend, I am becoming increasingly concerned that we still don't have a solution for this site.
Netgear switches seem to differ from other manufacturers in that there is no option to specify or configure a port as a link. We have five other similar installations that we want to move to a VLAN setup, and I really don't want to have to change out all those Netgear switches.
While VLAN configuration and operation seems to all work as expected between devices connected to the same physical switch, the major stumbling block, and current brick wall, is the failure to successfully pass VLAN traffic between identical switches for anything other than the devault VLAN(1).
I have found a few other threads on this forum describing similar problems, and none of those threads end with a conclusion or solution.
If anyone has any experience, good or bad, on passing VLAN traffic between GS724Tv4 (or similar) switches, I would be delighted if they would chip in here.
Attached, a jpg of our current network topology.
Hi snoworkin
I got the root cause for your problem.
It's due to wrong topology and configuration.
1. For inter-link cable between switches, you connect two cables between HLEWSW and HLEMSW, four cables between HLEMSW and HLWWSW, this will cause loop and STP protocol will blocking some ports traffic.
2. Suggest only connect one cable between switches if the Bandwidth is enough(if not, you can band two ports in LAG), then the inter-link port untag to VLAN1(by default) and tag to other VLANs(102, 254).
After do above two changes, it will work fine on your topology.
Could you please try again?
Hope it helps!
Regards,
EricZ
Hi snoworkin
Does the suggestion resolve your problem? Look forward to your update.
If reslove the problem, could you please click 'Accept as Solution' button, then the solution can help others.
Thanks.
Regards,
EricZ
Hi Retired_Member
Thanks for your help, the problem is now resolved.
The mistake that I made, was to think that I could use a dedicated inter-switch link cable per VLAN, and that by making the involved ports members of their respective VLANS only, that there would be no "looping" type problem.
As highlighted by you in the "TechSupport" files generated by our switches, this is not the case, and the switch blocks data traffic on any link cable other than the first one, as can be seen in the "STP mode" column in the port status section. I apologise for not spotting this for myself when I generated these files for you !!
I have now reconfigured things, using LAGs between the switches, making the appropriate LAGs members of the required VLANS, and everything is now working as expected.
Thanks again for your help, I now have a follow on question, and will start a new thread.
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