Jumbo frame on switches

teoyifang · ‎10-07-2009

Hi All,

My site has a network layout like the attachment. I have already set the MTU to 9000 on both node A and node D. The switch interface connected to node A and node D are also jumbo enabled now. But my jumbo frame still cannot function now. Is it I need to enable the jumbo on the uplink(red circle in attached photo) too?

Thanks in advance.

Danilo Dy · ‎10-07-2009

Yes, all interface along the path (ingress and egress) should be configured 9000bytes MTU.

Are you using switch or router? From your diagram its a router.

To avoid problem, Jumbo Frames is recommended for back-to-back connection and L2 network. If there is a L3 device in-between, make sure that the ingress and egress interface supports larger packet size, if NOT, the packet will be drop or fragmented by the router.

5 pages http://www.smallnetbuilder.com/content/view/30201/54/

Dandy

teoyifang · ‎10-08-2009

Hi Dandy,

Sorry....it is switch in between actually.

Danilo Dy · ‎10-08-2009

As the link stated, all devices/interface along the path should be configured for 9000bytes MTU.

Dandy