Configuring Jumbo Frames in vRack
Learn how to configure Jumbo frames in vRack
Last updated 17th August 2020
Objective
Jumbo frames are Ethernet frames with more than 1500 bytes of payload. They can carry up to 9000 bytes of payload. Using them minimizes routing processing time. In the case of vRack, this will optimize traffic on it.
This guide explains how to configure your Linux distribution to use Jumbo frames within the vRack.
Requirements
- a vRack.
- run a shell as root
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MTU size must be the same on all hosts in the same subnet.
Instructions
Step 1: Checking MTU
ip link show | grep mtu
Step 2: Setting new MTU size and test command
ip link set <interface name> mtu 9000
Step 3: Making changes permanent
Edit the file /etc/network/interface and add the following lines to it:
For a DHCP-managed interface
Auto <interface name>
Iface <interface name> inet dhcp
Pre-up /sbin/ip link set dev <interface name> up mtu 9000</p>
For a fixed IP interface
Auto <interface name>
Iface <interface name> inet static
mtu 9000
Go further
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