Yes, jumbo frames are an all or nothing feature on the 3750. -steve
On Jul 28, 2010 6:21 AM, <[email protected]> wrote: Hi, we got one VLAN on a Cat3750 on that we want enable jumbo frame support. I found this information on the Cisco website: ############################################################################################################### Catalyst 3750/3560 Series Catalyst 3750/3560 Series switches support an MTU of 1998 bytes for all 10/100 interfaces. All Gigabit Ethernet interfaces support jumbo frames up to 9000 bytes. The default MTU and jumbo frame size is 1500 bytes. You cannot change the MTU on an individual interface. You must set the MTU globally. Reset the switch afterwards for the MTU change to take effect. Configure Use the system mtu command to change the MTU for all 10/100 interfaces. This command only effects 10/100 interfaces. 3750(config)# system mtu 1546 3750(config)# exit 3750# reload Use the system mtu jumbo command to change the MTU for all Gigabit Ethernet interfaces. This command only effects Gigabit Ethernet Interfaces. 3750(config)# system mtu jumbo 9000 3750(config)# exit 3750# reload Note: Gigabit Ethernet ports are not affected by the system mtu command; 10/100 ports are not affected by the system mtu jumbo command. If you do not configure the system mtu jumbo command, the setting of the system mtu command applies to all Gigabit Ethernet interfaces. ############################################################################################################### We got one VLAN which we will be using as out NFS/SAN VLAN. For my understanding, we could only enable jumbo frame support global, not for an specific interface. Am I right? Thanks for your help. Cheers Simon CCIE #26323 (Sec) _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
