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02-19-2014 09:00 AM - edited 02-19-2014 09:12 AM
02-19-2014 09:00 AM - edited 02-19-2014 09:12 AM
Enable jumbo frames on A5120 SI.
Hello,
Just working on an A5120 and wanted to enable jumbo frames. I read the documentation here:
HP A5120 EI Switch Series Layer 2 - LAN Switching
And then tried to apply the configuration the A5120, however it doesn't work as described. I cannot enable jumbo frames on the individual interfaces (aggregation ports or gigabit) as the document says. When checking the online help in the CLI, the only place I can do so is immediately after switching to system-view I can do 'jumboframe enable'. However when I check the configuration I don't the setting anywhere so I have some doubts this command is doing what it suggests. Is there another way to check and confirm jumbo frames are turned on?
I have tested by pinging with various send buffer sizes and the dont fragment flag, and it appears jumbo frames is not enabled. However perhaps I am not doing it correctly.
Any help is appreciated.
Thanks.
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02-19-2014 10:36 AM
02-19-2014 10:36 AM
Re: Enable jumbo frames on A5120 SI.
I dont know about 5120SI but in 5120EI jumboframes are enabled by default.
This means that when you do "display current-configuration" it wont show anything regarding jumboframes because its default. Only interfaces with jumboframing disabled will show up with "undo jumboframe enable" in the configuration.
In order to verify if your interface allows jumbos or not you can do:
display interface GigabitEthernet 1/0/1
Which will have a line that informs you of current status:
Forbid jumbo frame to pass
In the above case jumbos are disabled.
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