Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Jumbo Frame Across Multiple Switches

Hi,

I hope someone can help me with this question.


My network is set up as the diagram.

I now need to turn on Jumbo Frames on to VLAN 30 for a storage network.

To do this, i need change the mtu to 9000 on Switches A+C+D

By doing this....will this cause any problems with the connectivity between Switch A+B or the Servers Plugged into Switch A or B?

Are there any problems with any devices or servers using the default MTU which are plugged into switches running at Jumbo Frames.

What other problems will i have with Jumbo Frames?

Thanks for all your help.

James

1 REPLY
New Member

Re: Jumbo Frame Across Multiple Switches

Hi James,

Is it just IP your using in this network? If so, I dont imagine you'll have any problems. IP hosts uses MTU path discovery when communicating to determine the maximum MTU size each host supports. Eg. Hosts on switch C/D will not send jumbo frames to hosts on switch B.

We run our network with a mixture of switches that do and do not support jumbo frames. Yo ujust need to make sure that the full path requiring jumbo frames supports it otherwise its all a bit of a waste.

Rgds

Scott

722
Views
0
Helpful
1
Replies