MTU for Virtual Networks Cannot be Modified

Problem

• MTU for Virtual Networks cannot be modified.
• PCD UI does not provide any option to increase the MTU for Virtual Networks.

Environment

• Private Cloud Director Virtualization - v2026.1 and Higher
• Self Hosted Private Cloud Director Virtualization - v2026.1 and Higher

Cause

• This is a known issue and is already reported with ID: PCD-6454.

Refer the Workaround section on how to set the MTU for Virtual Networks.

Workaround

• MTU for Virtual Networks can be modified through CLI.
• In the RC file that is needed for the communication between pcdctl CLI and PCD, change the variable OS_INTERFACE value from public to admin.
• Set the relevant tenant name in the OS_PROJECT_NAME variable if applicable.
• Re-source the RC file.
• Change the MTU using the below command:

pcdctl network set --mtu <MTU_VALUE> <NETWORK_UUID/NAME>

Additional Information

• Reach out to Platform9 Support with the issue ID mentioned in the Cause section if there are any questions/concerns.