Health Payment Systems
asked on
Device mtu size on a 9198 mtu switch
Hello,
I have a Cisco 3850 switch with a global MTU setting of 9198. From what I've read, you can do per port mtu settings on a 3850. I had set the global mtu to 9198 since we are currently using the switch connected to a 1gbe SAN.
Can devices attached to the 3850 switch connect with the NIC set to MTU 1500 size? i have VMware hosts connected to the switch with 1500 mtu set for the data nics (pnics not connected to iscsi). They appear to be working fine for the most part but I do see slightly higher ping times to device connected to the same switch (2-8ms range).
Does the MTU size only come into effect with for devices in the same vlan? If two devices are in the same vlan but have their nics set to 1500, they should be okay correct?
I have a Cisco 3850 switch with a global MTU setting of 9198. From what I've read, you can do per port mtu settings on a 3850. I had set the global mtu to 9198 since we are currently using the switch connected to a 1gbe SAN.
Can devices attached to the 3850 switch connect with the NIC set to MTU 1500 size? i have VMware hosts connected to the switch with 1500 mtu set for the data nics (pnics not connected to iscsi). They appear to be working fine for the most part but I do see slightly higher ping times to device connected to the same switch (2-8ms range).
Does the MTU size only come into effect with for devices in the same vlan? If two devices are in the same vlan but have their nics set to 1500, they should be okay correct?
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Basically yes, same MTU should be fine.
IP MTU is used for routing and you most likely don't want to route jumbo frames, so leaving this on 1500 should be fine.
IP MTU is used for routing and you most likely don't want to route jumbo frames, so leaving this on 1500 should be fine.
ASKER
What about the SVI for each vlan? Do they need a specific "ip mtu" configured for them?