Dell BigIron RX Series, Configuration Manual

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BigIron RX Series Configuration Guide 175
53-1002253-01
Configuring IP parameters
7
Use the no form of the command to remove a domain name from the domain-list.
Displaying the domain name list
To determine what domain names have been configured in the domain list, enter the following
command.
BigIron RX(config)#show ip dns domain-list
Total number of entries : 3
Primary Domain Name:
Domain Name List:
seq:4 eng.company.co
seq:5 facilities.company.com
seq:12. support.company.com
Syntax: show ip dns domain-list
Verifying domain name or IP address
You can use the ip domain-lookup command to verify the host name for an IP address or the IP
address for a host name. For example, if you have an IP address and you want to find out what host
name it resolves to, enter the following command.
BigIron RX#ip domain-lookup 66.151.144.5
Host Flag TTL/min Type Address
border2.pc0-0-bbnet1.sje.pnap.net (TMP,OK) 720 IP 66.151.144.5
You can also enter the following.
BigIron RX#ip domain-lookup border2
Host Flag TTL/min Type Address
border2.pc0-0-bbnet1.sje.pnap.net (TMP,OK) 720 IP 66.151.144.5
Syntax: ip domain-loopkup <ip-address> | <host-name>
<ip-address> Enter an IP address to obtain the host name.
<host-name> Enter the host name to obtain the IP address.
The complete, qualified host name, along with its IP address and TTL value are displayed.
Adding host names to the DNS cache table
Dynamic cache entries
The entries in a DNS cache table are used to resolve host names to IP addresses. When a client
initiates a DNS query, the Brocade device checks the DNS cache table to see if the host name can
be resolved to any of the entries. If a match is found, the query is resolved. If a match is not found,
the DNS resolver sends the query to the DNS servers. If the name is resolved, the complete,
qualified host name and its IP address is added to the DNS cache table and the hosts’ IP address
is returned to the client.