Users Guide

Table Of Contents
You can enable the DHCP to obtain an IP address from the DHCP server automatically.
Enabling or disabling DHCP for DNS IP addresses
By default, the CMC’s DHCP for DNS address feature is disabled. When enabled, this feature obtains the primary and secondary
DNS server addresses from the DHCP server. While using this feature, you do not have to configure static DNS server IP
addresses.
To enable the DHCP for DNS address feature and specify the static preferred and alternate DNS server addresses, type:
racadm config -g cfgLanNetworking -o
cfgDNSServersFromDHCP 1
To enable the DHCP for DNS address feature for IPv6 and specify the static preferred and alternate DNS server addresses,
type:
racadm config -g cfgIPv6LanNetworking -o
cfgIPv6DNSServersFromDHCP6 1
Setting static DNS IP addresses
NOTE: The static DNS IP addresses settings are not valid unless the DCHP for DNS address feature is disabled.
For IPv4, to set the preferred primary and secondary DNS IP server addresses, type:
racadm config -g cfgLanNetworking -o cfgDNSServer1 <IP-address>
racadm config -g cfgLanNetworking -o cfgDNSServer2 <IPv4-address>
For IPv6, to set the preferred and secondary DNS IP Server addresses, type:
racadm config -g cfgIPv6LanNetworking -o
cfgIPv6DNSServer1 <IPv6-address>
racadm config -g cfgIPv6LanNetworking -o
cfgIPv6DNSServer2 <IPv6-address>
Viewing and modifying CMC network LAN settings
The LAN settings, such as community string and SMTP server IP address, affect both the CMC and the external settings of the
chassis.
When IPv6 is enabled at boot time, three router solicitations are sent after every four seconds. If external network switches
are running the Spanning Tree Protocol (STP), the external switch ports may be blocked for more than 12 seconds in which
the IPv6 router solicitations are sent. In such cases, there may be a period when IPv6 connectivity is limited, until router
advertisements are gratuitously sent by the IPv6 routers.
NOTE: Changing the CMC network settings may disconnect your current network connection.
NOTE: You must have Chassis Configuration Administrator privilege to set up CMC network settings.
Viewing and modifying CMC network LAN settings using CMC web
interface
To view and modify the CMC LAN network settings using CMC Web interface:
1. In the left pane, click Chassis Overview, and then click Network. The Network Configuration page displays the current
network settings.
2. Modify the general, IPv4, or IPv6 settings as required. For more information, see the Online Help.
58
Configuring CMC