NexaSphere MTU Change

[nexus]

MTU 9000 Configuration Guide

1. Configure the Distributed Switch (UI)

Create the Distributed Switch (DSwitch) with its Port Groups and set the MTU for each:

Port Group	MTU
Storage	9000
VM Traffic	1500

In NexaSphere, also set the MTU to 9000 on the storage Port Group:

Inventory > Network Resource > select the storage Port Group > Actions > Modify Configuration > set MTU to 9000

2. Set the MTU on the Host (CLI)

ip link set dev <bond> mtu 9000
ip link set dev <bridge_storage> mtu 9000

To make this setting persistent, update the network configuration files as described in the next step.

3. Make the Configuration Persistent

Add or edit MTU=9000 in the following files:

/etc/sysconfig/network-scripts/ifcfg-<uplink>
/etc/sysconfig/network-scripts/ifcfg-<bridge_storage>

Then restart the network service:

systemctl restart network

4. Reboot the Host

Reboot the host.

Verification

ip link show <bond> | grep mtu
ip link show <bridge_storage> | grep mtu
ping -M do -s 8972 <storage_target_ip>