Setting the MTU

Network performance improves with the highest maximum transmission unit (MTU) that the network can support. You can specify the MTU value for A-link and business (biz) networks using the Networks page of the ztC Edge Console.

Note: When you change the MTU of either business network ibiz0 (also referred to as network0) or ibiz1 (also referred to as network1) on a dual-node system, the system automatically migrates the VMs from one node to the other. If you change the MTU for ibiz0 specifically, the system also automatically fails over from the primary node to the secondary node. To avoid this issue, avoid changing the MTU of the business networks, or change the MTU only during a planned maintenance period.

On a single-node system, the VMs shutdown, so you should avoid changing the MTU. If you must change it, do so only during a planned maintenance period.
Prerequisite: If you want to change the MTU on a business network of a single-node system, shut down all VMs using that network before changing the MTU.

To set the MTU of an A-Link or business network

  1. Click Networks in the left-hand navigation panel, to open the Networks page.
  2. In the top pane, select the A-link or business network whose MTU you want to set.
  3. Click Config.
  4. In the Configure Shared Network window, select the Network Role (Business or A-Link).

  5. Under MTU, type a bytes value from 1280 to 65535. The default values are:

    System Model

    MTU Values for Ethernet Ports

    Port A1 (for A-Link1) and
    Port A2 (for priv0)
    (Dual-node Systems, Only)

    Ports P1 - P6
    (ibiz0 - ibiz5)
    100i 1500 1500
    110i 9000 1500
    200i 9000 1500
    250i 9000 1500
  6. Click Save.

Related Topics

Networks Page

ztC Edge Console

Using the ztC Edge Console