Does enabling Jumbo Frames on my 3750g L3 switch affect all Hosts?

Answered Question
Mar 1st, 2010

I understand that with this switch I can only enable jumbo frames globally.  By doing this, will it affect other servers that are connected to the switch that are not configured for jumbo frames?  I believe it will but wanted to confirm it.  We are only going to have two servers on the same vlan sending jumbo packets to each other (Oracle).

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Correct Answer by Reza Sharifi about 6 years 10 months ago

Hi,

Since "system mtu jumbo" is global it will effect all L-2 devices. You also have to reboot the switch for the jumbo frame size to take effect.  It will not effect any layer-3 connection/adjacency unless you enable  "system mtu routing"(L-3).

HTH

Reza

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Correct Answer
Reza Sharifi Mon, 03/01/2010 - 14:47

Hi,

Since "system mtu jumbo" is global it will effect all L-2 devices. You also have to reboot the switch for the jumbo frame size to take effect.  It will not effect any layer-3 connection/adjacency unless you enable  "system mtu routing"(L-3).

HTH

Reza

vhi-networks Mon, 03/01/2010 - 15:09

You mention that all L2 devices would be affected.  What is the net affect?

Packet loss?

Unable to connect or communicate?

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