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

vhi-networks
Level 1
Level 1

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).

1 Accepted Solution

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Reza Sharifi
Hall of Fame
Hall of Fame

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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5 Replies 5

Reza Sharifi
Hall of Fame
Hall of Fame

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

That's what I was afraid of.  Thanks for the information!

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

Packet loss?

Unable to connect or communicate?

Drop-outs.  Lot's of it.

Got it, thanks!  Makes sense!

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