Switch HP-Procurve Stacking – HP 2920 Stacking Without Stacking Module

hp-procurvestackingswitch

Is it possible to stack HP 2920 switches via ethernet connections (without add-in stacking modules)? I've consulted several of the docs on HPs site but can't find a definitive answer. I have older switches that are stacked this way.

Best Answer

I attempted to stack the switches referencing the guides provided, but the commands were invalid, seemingly not applying to this device. I upgraded to the latest firmware to be sure it wasn't from having an old version. No luck.

I contacted HP support which told me this:

The stacking on this switch is different than the other procurve switches. There needs to be a stacking module attached to the switch to enable stacking.

So it appears that a stacking module is required to stack the 2920. Thanks for all the help. I'm going to buy stack modules now. I'm not sure how this will interact with other procurve switches in a stack. I wish the guides were more clear about all this up-front but maybe this posting will help others.

Related Solutions

Non-Cisco SFPs – Err-Disable State in 2960s and 2960 PoE Switch

After some research I determined that Cisco automatically disables non cisco branded SFPs. In order to prevent them from defaulting to err-disable I had to enter the following commands in config mode.

Router(config)#service internal
Router(config)#no errdisable detect cause gbic-invalid
Router(config)#service unsupported-transceiver

I then configured the SFP interface to a management vlan, connected a laptop to it by changing the laptop's IP address and confirmed that the SFP does indeed take traffic. Hope this helps!

Cisco 2960-X: Discover SFP Modules Without Rebooting

Maybe these bugs are affecting you:

CSCuj74167 (Gigabyte link from WS-C2960X-48FPD-L not coming up when using GLC-SX-MM) applies to you. Fixed in software release 15.0(2)EX4.
CSCul88801 (1G or 10G in uplink ports of a Catalyst 2960x stack may not come up after a reload or OIR of SFP/SFP+. 1G or 10G SFP appear as “unknown” in the output of the show int status command.). Fixed in software release 15.0(2)EX5.

So before looking any further, I'd upgrade to at least 15.0(2)EX5. (Which is the latest stable available for 2960X as of this writing).

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Related Solutions

Non-Cisco SFPs – Err-Disable State in 2960s and 2960 PoE Switch

Cisco 2960-X: Discover SFP Modules Without Rebooting

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