000034177 - How to set the MTU size on RSA Netwitness appliances 10.x

Document created by RSA Customer Support Employee on Oct 11, 2016Last modified by RSA Customer Support Employee on Apr 21, 2017
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Article Number000034177
Applies ToRSA Product Set: Netwitness Suite
RSA Product/Service Type: Netwitness UI Server
RSA Version/Condition: 10.x
Platform: CentOS
O/S Version: 6
Product Name: Netwitness for Logs and Packets
IssueSome customers wants to change the MTU of their Netwitness appliances for the sake of increasing the network performance.
ResolutionThere are two ways of changing the MTU on the appliances 
1- To change it on fly (the change will take effect immediately but will revert back with network/appliance restart
Please use:


ifconfig eth0 mtu 1500 up

  Change the eth0 depending on the interface name and 1500 depending on the MTU needed value

2- To change it permanently,
Please use

vi /etc/sysconfig/network-scripts/ifcfg-eth0

 Change the eth0 depending on the interface name
Add the below the line at the end of the file 

Change 1500 with the needed value

Restart network service on the appliance.
service network restart

NotesThis optimal value for the MTU should be provided by the customer's network team.