Brocade Communications Systems ICX 7250 series, Руководство по настройке

Страница: 58 / 483

To define DNS servers, enter the ip dns server-address command.
device(config)# ip dns server-address 10.157.22.199 10.96.7.15 10.95.7.25 10.98.7.15
Syntax: [no] ip dns server-address ip-addr [ ip-addr ] [ ip-addr ] [ ip-addr ]
In this example, the first IP address entered becomes the primary DNS address and all others are secondary addresses. Because IP
address 10.98.7.15 is the last address listed, it is also the last address consulted to resolve a query.
Defining a domain list
If you want to use more than one domain name to resolve host names, you can create a list of domain names. For example, enter the
commands such as the following.
device(config)# ip dns domain-list company.com
device(config)# ip dns domain-list ds.company.com
device(config)# ip dns domain-list hw_company.com
device(config)# ip dns domain-list qa_company.com
The domain names are tried in the order you enter them.
Syntax: [no] ip dns domain-list domain-name
Using a DNS name to initiate a trace route
Suppose you want to trace the route from a Brocade Layer 3 switch to a remote server identified as NYC02 on domain newyork.com.
Because the NYC02@ds1.newyork.com domain is already defined on the Layer 3 switch, you need to enter only the host name,
NYC02, as noted in the following example.
device# traceroute nyc02
Syntax: traceroute [ vrf vrf ] host-ip-addr [ maxttl value ] [ minttl value ] [ numeric ] [ timeout value ] [ source-ip ip addr ]
The only required parameter is the IP address of the host at the other end of the route.
After you enter the command, a message indicating that the DNS query is in process and the current gateway address (IP address of the
domain name server) being queried appear on the screen. When traceroute fails, an error occurs as shown in the last two lines in the
given example.
Type Control-c to abort
Sending DNS Query to 10.157.22.199
Tracing Route to IP node 10.157.22.80
To ABORT Trace Route, Please use stop-traceroute command.
Traced route to target IP node 10.157.22.80:
IP Address Round Trip Time1 Round Trip Time2
10.95.6.30 93 msec 121 msec
Trace route to target IP node 10.157.22.80 failed.
IP: Errno(9) No response from target or intermediate node
NOTE
In the previous example, 10.157.22.199 is the IP address of the domain name server (default DNS gateway address), and
10.157.22.80 represents the IP address of the NYC02 host.
Configuring IP parameters - Layer 3 switches
Brocade FastIron Layer 3 Routing Configuration Guide
58 53-1003903-04