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New Member

JUMBO FRAMES

I just spoke to a colleugue and he said are we using jumbo frames there for your backups, can anyone enlighten me on this issue

thanks

Carl

  • Other Network Infrastructure Subjects
25 REPLIES
Bronze

Re: JUMBO FRAMES

I think jumbo frames refers to giant frames.

Here is what I came up with on them

http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml

New Member

Re: JUMBO FRAMES

does this make much difference to the speed of my backups ?

Re: JUMBO FRAMES

Hi Carl

Can you be more specific on what kinda backups you are talking about here ??

regds

New Member

Re: JUMBO FRAMES

basically out server backups, mail, file servers etc across my lan !!

Hall of Fame Super Silver

Re: JUMBO FRAMES

Jumbo frames can definitely make a difference in throughput and server load. Here is one citation supporting this assertion: http://www.small-tree.com/jumbo5.htm

Jumbo frames need to be enabled on both your host and any intervening network equipment.

Hope this helps. Please rate helpful posts.

New Member

Re: JUMBO FRAMES

would I change the mtu for the whole switch or particular interface ?

Hall of Fame Super Silver

Re: JUMBO FRAMES

For some switches (e.g., Catalyst 6000 series), jumbo frame support is configured at the port level. Others have it as a global setting. Some don't support jumbo frames at all. See the configuration guide posted above by arvindchari for details and syntax.

New Member

Re: JUMBO FRAMES

Can anyone suggest a good size to set my mtu as, this wont cause any problems with my normal traffic I presume ? what does everyone else set theres as ?

I think its between 1500 and 9000 ?

thanks

Re: JUMBO FRAMES

Changing the MTU size on 6500 series switches will be applicable for port level, where as for switches like 3550,3750 it will apply for all the ports by default.in this case you need to restart the switches.

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