I have a Cisco 3750X switch stack (2 switches stacked) and have a Compellent and three Equalogics as well as three VMware hosts directly connected but separated via different vLANs on this switch. The SAN appliances need Jumbo packets turned on (MTU 9000) and the hosts will have the ISCSI interfaces set to use MTU 9000 as well but some of the other interfaces need to remain on MTU 1500.
Since this particular switch is unable to be configured per interface to have different MTU settings if I change the System MTU to 9000 will this have any adverse effects on those devices still needing their MTU setting set to 1500? Fo the the SAN appliances will I also need to change SYSTEM MTU ROUTING to match the MTU setting of 9000 in order for those to fully utilize Jumbo frames?
Unsure and trying to follow best practices for these Dell storage appliances.