Is it possible to change (increase) the Global MTU value on a 3850 stack without rebooting the stack? We're finding mixed information on this subject.
We have a production core switch stack of 3, WS-C3850-24XS switches on version 03.07.04E. The Global MTU for the stack is currently set to 9000. We need to trunk an iSCSI VLAN from a 6500 which is already configured with an MTU of 9216. The iSCSI SAN and VMware hosts (on the 6500) are all configured with an MTU of 9000. So it would appear that we need to raise the MTU value on our 3850 core to a value higher than 9000 to support iSCSI hosts on the 3850 (same VLAN). Rebooting the 3850 switch stack is not really an option unfortunately.
Does anyone have experience with changing the MTU on a 3850 running 03.07.04E or newer?
Thanks!
Core3850#show system mtu
Global Ethernet MTU is 9000 bytes.
WS-C3850-24XS
Cisco IOS Software, IOS-XE Software, Catalyst L3 Switch Software (CAT3K_CAA-UNIVERSALK9-M), Version 03.07.04E RELEASE SOFTWARE ( fc1)
