Cisco Cisco Email Security Appliance X1070 Troubleshooting Guide
Can the smtproutes command be used for load
balancing?
balancing?
Document ID: 118189
Contributed by Shiu Ng and Stephan Bayer, Cisco TAC Engineers.
Aug 07, 2014
Aug 07, 2014
Contents
Question
Question
Can the smtproutes command be used for load balancing?
The smtproutes command in the CLI, or the Network−>SMTP Routes page on the GUI, allows you to
redirect all email for a particular domain to a specific mail exchange (MX) host, without rewriting the
envelope recipient.
redirect all email for a particular domain to a specific mail exchange (MX) host, without rewriting the
envelope recipient.
Multiple destination hosts can be specified for a particular domain name. If you specify multiple routes for a
particular domain name, the Cisco ESA will cycle through the destination hosts you specify in a
"round−robin" fashion.
particular domain name, the Cisco ESA will cycle through the destination hosts you specify in a
"round−robin" fashion.
There is no load balancing performed by the Cisco ESA on smtproutes.
If you need to load balance your internal mail exchange hosts, you will need to configure your Cisco ESA to
redirect mail for your domain(s) to your already−configured load balancer. The load balancer is responsible
for balancing the load between each mail exchange host for which it is configured.
redirect mail for your domain(s) to your already−configured load balancer. The load balancer is responsible
for balancing the load between each mail exchange host for which it is configured.
Updated: Aug 07, 2014
Document ID: 118189