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How to enable Jumbo Frames on a HP ProCurve Switch.

When configuring an iSCSI network, donโ€™t forget to enable the Jumbo Frames on you physical switches. Follow these steps to enable the Jumbo Frames on a specific VLAN on a HP ProCurve switch:

  1. Login to your switch.
  2. After login type: <switch># config
  3. You will enter the config mode, type: <switch>(config)# show vlans to show the VLAN configuration.
  4. To enable Jumbo Frames on the VLAN type: <switch>(config)# vlan <ID#> jumbo
  5. Check if the setting applied successfully by typing: <switch>(config)# show vlans again. The Jumbo column for the specific VLAN in the outputย should change to Yes.
  6. Save your changes:<switch>(config)# write memory
  7. Logout from the switch.

Tested on a HP ProCurve 2900-24G switch.

Cheers!

– Marek

About Marek (288 Articles)
Marek is an IT professional with 15+ years of experience in the IT industry and is currently working as PSO Senior Consultant SDDC at VMware for the NEMEA region.

28 Comments on How to enable Jumbo Frames on a HP ProCurve Switch.

  1. Thanks for your notes for configuring Jumbo Frames

    This also worked on an HP Procurve 5406zl switch

    Regards

    Rich M

  2. Are there any consequences to enabling jumbo frames on procurve 2510g-48 switches? COuld this cause issues on my network etc??

    • Hi Peter,

      Well, it depends. Jumbo frames are usually used in storage networks. It’s is not recommended to mix the regular network traffic with storage traffic.

      Cheers!

    • There can always be consequences ๐Ÿ™‚ jumbo packets save CPU time on your devices and are a little more efficient on network bandwidth due to the reduced header information. You fit up to 6 times more data (on a standard jumbo packet) vs a regular packet. The down side is that your networking equipment (to your border ideally) should support jumbo packets.

      As Marek said, jumbo packets are generally used on iSCSI SAN networks to reduce the processing overhead given the high volume of packets that flow across those networks, however, you can give your production network a slight performance improvement if your equipment (and network cards) support it. Generally it’s not enough to worry about for your normal network environment though.

  3. Thanks for this Marek, it helped resolve a storage issue we had on our E3800-24. The default VLAN indicates Jumbo frames are on when in fact the MTU is correct but Jumbo Franmes was actually disabled. I used your post show this and change the MTU on the storage VLAN. Awesome!

  4. Thanks.. It worked for me.. ๐Ÿ™‚

  5. Can you do this to a live environment without causing issues to iscsi connections?

    • Hi Nigel,

      If I recall correctly, yes. But there could be changes in the new software since this is quite old blog. I suggest you consult the manual or ask your HP representative.

      Cheers!

      • Thanks for the quick reply. We have two running in a cloud environment and we’re migrating off the current SAN and need to make changes to config but can’t find anything in the manual. I don’t want to break any VMs in the process. Will see if I can get anything from tech support.

        • No problem Nigel,

          Just one thing I forgot to mention. When you migrate to jumbo frames make sure you configure the whole stack for JFs otherwise you can get some performance issues. I suggest you enable JFs on non-production hours and test the performance.

          Cheers!

  6. is jumbo frame enable by default ?

  7. Why jumbo command is not accepted on a procurve 2650 J4899A…Is there a other commando what do the same?

  8. Hi Sir

    Is there will be a problem if the hp procurve 2920 10/100/1000 is set in a jumbo frame and the other switches is hp procurve 2520 10/100 is set in jumbo frame?

    thanks

    • Hi,

      It depends. If you configure for example iSCSI traffic for your ESXi hosts then you have to configure the whole stack to use jumbo frames. In some switch types you can set it up for the VLAN only.

      Hope this helps.

      Cheers!

  9. Can any one confirm if jumbo frame can be set on only one VLAN (not the whole switch) on HP ProCurve 2510g-48 switch?

    • Hi,

      You can test this when you are in the vlan config mode. If there is a command to enable jumbo frames there, you should be able to set the jumbo frames per vlan. Otherwise this will be a global switch command if I am not mistaken.

      Hope this helps.

      Cheers!

  10. Good stuff Marek,

    I just tested on ProCurve Switch 2510G-48 (J9280A) and I was able to set jumbo frame on one VLAN only. Thank you for your help! ( Dziekuje ๐Ÿ™‚ )

  11. If I set all of my ports to Jumbo frames, do regular frames pass through as normal? I have 3 48-port HP2810 + 1 24-port HP2810 stacked. I can definitely see setting the iSCSI vLAN to Jumbo, but what about the rest of the network? If I set all ports to support jumbo what happens to all the hardware?

    It’s really weird. I had a power failure recently, and I think it disabled Jumbo’s on my 48 port that I have my VMWare ESXi and EMC San attached to. I also had a Mac xserve in the same iSCSI vlan. When power came back I couldn’t get my Mac to connect to the iSCSI drives I had setup. Spent about 4 days trying to solve the problem. I changed the MTU in my Mac xserve to 1500 and bam, all 4 drives finally popped up on the Mac. My EMC and VMWare was running fine, both are set to Jumbo (9000). The switch however, has Jumbo disabled on all ports/vlans. Why is my VMWare still working at 9000?

    The whole thing is confusing the heck out of me now. It totally stumped the support company that tried to help me resolve the problem. 4 days to find one setting. Everything worked fine for 2-3 years prior to this power failure. I’m beginning to doubt the settings ever were jumbo in the switch, but it had to be the problem. The SAN is still set to 9000. The switch between them is set to 1500 still. How is the SAN talking to the Mac, which is set to 1500.

  12. Hi Marek,

    thank you. Time saver.

    Cheers,

    Paul

  13. Can I set mtu less than 1400 on HP 3500

  14. Hey Marek,

    I’ve enabled the jumbo on one of my vlans (thanks it was a massive time saver). However its saying enabled in Telnet but its not enabled on the WebUI any ideas?

    I’m using the HP-2920-48G.

    Thanks,
    Chris

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