Dell PowerConnect B-FCXs Configuration Manual page 846

26
Configuring IP parameters – Layer 3 Switches
For example, if the domain "ds.company.com" is defined on a Layer 2 Switch or Layer 3 Switch and
you want to initiate a ping to "mary". You need to reference only the host name instead of the host
name and its domain name. For example, you could enter the following command to initiate the
ping.
U:> ping mary
The Layer 2 Switch or Layer 3 Switch qualifies the host name by appending a domain name. For
example, mary.ds1.company.com. This qualified name is sent to the DNS server for resolution. If
there are four DNS servers configured, it is sent to the first DNS server. If the host name is not
resolved, it is sent to the second DNS server. If a match is found, a response is sent back to the
client with the host IP address. If no match is found, an "unknown host" message is returned.
(Refer to
FIGURE 127
1. Client sends a
command to ping
"mary"
Defining a domain name
To define a domain to resolve host names, enter a command such as the following.
PowerConnect(config)# ip dns domain-name ds.company.com
Syntax: [no] ip dns domain-name <domain-name>
Enter the domain name for <domain-name>.
804
Figure 127.)
DNS resolution with one domain name
Domain name
eng.company.com is
configured in the
device
2. Device sends
"mary.eng.company.com
to DNS servers for resolution.
4. If "mary.eng.company.com"
is in the DNS servers, its IP
address is returned. If it is not
found, a "unknown host"
message is returned.
DNS Servers with host
names and IP addresses
configured
DNS Server 2
DNS Server 4
This server has
"mary.eng.company.com"
3. Beginning with DNS Server 1,
DNS Servers are checked
in sequential order to see if
"mary.eng.company.com"
is configured in the server.
PowerConnect B-Series FCX Configuration Guide
DNS Server 1
DNS Server 3
53-1002266-01