Users Guide

3. Click Apply Changes.

• When Management Port 2 is set for Redundant but is cabled for Stacking, the downstream CMCs

(further from the top-of-rack switch) does not have a network link.

• When Management Port 2 is set for Stacking but is cabled for Redundant (two connections to the

TOR switch), routing loops could cause a network storm.

Configuring Management Port 2 Using RACADM

To specify Redundant operation, use racadm config –g cfgNetTuning –o

cfgNetTuningNicRedundant 1 command.

To specify Stacking operation, use racadm config –g cfgNetTuning –o

cfgNetTuningNicRedundant 0 command.

By default, the Management Port 2 is set for Stacking.

Configuring Services

You can configure and enable the following services on CMC:

• CMC serial console — Enable access to CMC using the serial console.

• Web Server — Enable access to CMC web interface. Disabling the web server also disables Remote

RACADM.

• SSH — Enable access to CMC through firmware RACADM.

• Telnet — Enable access to CMC through firmware RACADM

• Remote RACADM — Enable access to CMC using RACADM.

• SNMP — Enable CMC to send SNMP traps for events.

• Remote Syslog — Enable CMC to log events to a remote server. To use this feature, you must have an

Enterprise license.

NOTE: When modifying CMC service port numbers for SSH, Telnet, HTTP, or HTTPS, avoid using

commonly used ports by OS services such as port 111. See Internet Assigned Numbers Authority

(IANA) reserved ports at http://www.iana.org/assignments/service-names-port-numbers/service-

names-port-numbers.xhtml.

CMC includes a web server that is configured to use the industry-standard SSL security protocol to

accept and transfer encrypted data from and to clients over the Internet. The web server includes a Dell

self-signed SSL Digital Certificate (Server ID), and is responsible for accepting and responding to secure

HTTP requests from clients. This service is required by the web interface and remote RACADM CLI tool

for communicating with CMC.

If the web server resets, wait at least one minute for the services to become available again. A web server

reset usually happens as a result of any of the following events:

• Network configuration or network security properties are changed through the CMC web user

interface or RACADM.

• Web server port configuration is changed through the web user interface or RACADM.

• CMC is reset.

• A new SSL server certificate is uploaded.