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New Member

Jumbo Frames on 6509

Hi,

I have surprised to see the default MTU size 9216 on cisco 6509 e Series switch, but when i check the interface it is showing 1500 Bytes MTU. Also i cant even see for which module or interface the MTU size 9216 is enabled.

I am trying yo speedup our server farm as i am facing very low speed issue.

please help.

regards,

Azeem

4 REPLIES

Jumbo Frames on 6509

Hi Azeem,

you have to set the MTU per port:

!

int gi1/1

  mtu 9126

!

cheers,

Seb.

New Member

Jumbo Frames on 6509

hey Seb,

tried that one already it gives...  the below result. Please go through the output below

Switch(config-if)#mtu ?

% Unrecognized command

My IOS ver:- Version 12.2(18)SXF17b

Supervisor Engine 720   WS-SUP720-BASE

Switch(config)#system jumbomtu ?

  <1500-9216>  Jumbo mtu size in Bytes, default is 9216

Switch(config)#do sh int g2/25

GigabitEthernet2/25 is up, line protocol is up (connected)

  Hardware is C6k 1000Mb 802.3, address is 0015.f9f1.7ae8 (bia 0015.f9f1.7ae8)

    MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

Regards,

Azeem

VIP Super Bronze

Jumbo Frames on 6509

Hi,

What type of line card do you have?

The WS-X6548-GE-TX, WS-X6548V-GE-TX, WS-X6148-GE-TX, and WS-X6148V-GE-TX do not support jumbo frames.

more info here:

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configuration/guide/intrface.html#wp1041111

HTH

New Member

Jumbo Frames on 6509

Dear Reza,

I will check and confirm

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