Jumbo Frame - Enabling on a VLAN of CAT 6500 running IOS

[astanislaus]

Jumbo frames needs to be enabled on one of the vlan interface on Cisco 6500 IOS Switch.

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• •1) Once enabled the mtu 9216 on the required vlan interface do we need to reload the switch to take effect (I believe that in some low end swicthes it needs a reload)
  
• •2) If we enable only one Vlan interface, how about the other vlan interfaces(about 200 are on this switch)? Do we need to specify mtu1500 on other vlan interfaces?
  

I have read information at the following two links, but I still wish to reconfirm by asking the questions in this forum. Someone who has already implemented this may have gained more experience while implementing it on CAT 6500 IOS Switch.

https://supportforums.cisco.com/message/963341#963341

http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml

http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml#backinfo1

Thanks.

Alphonse

[Reza Sharifi]

You do not need to reboot your 6500 after you enable jumbo frames, but it is good idea to do it during an outage window. You only need to reboot smaller switches i.e. 3560, 3750, etc...after enabling jumbo frames. On these switches you can only enable it globally.  Only enable jumbo frames for the vlans you need.  You usually need jumbo frames for vlans connecting to the storage systems.

Good Luck

[saadjaffary]

Hi,

The question I would like to ask is if I have two 6500 switches using a Trunk to connect with multiple VLANs on it. Do I need to enable the jumbo frame for

1. Storage VLAN SVI only or

2. Storage VLAN SVI + Physical Trunk Ports or 

Regards,

Saadi