Dell PowerConnect B-FCXs, Configuration Manual

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804 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Configuring IP parameters – Layer 3 Switches
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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 .)
FIGURE 127
DNS resolution with one domain name
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> .
1. Client s end s a
comm a nd to ping
"m a ry"
Dom a in n a me
eng.comp a ny.com i s
config u red in the
device
DNS Server s with ho s t
n a me s a nd IP a ddre ss e s
config u red
DNS Server 1
DNS Server 2
DNS Server 3
DNS Server 4
2. Device s end s
"m a ry.eng.comp a ny.com
to DNS s erver s for re s ol u tion.
4. If “m a ry.eng.comp a ny.com”
i s in the DNS s erver s , it s IP
a ddre ss i s ret u rned. If it i s not
fo u nd, a “ u nknown ho s t”
me ssa ge i s ret u rned.
3. Beginning with DNS Server 1,
DNS Server
s a re checked
in s eq u enti a l order to s ee if
“m a ry.eng.comp a ny.com”
i s config u red in the s erver.
Thi s s erver h as
“m a ry.eng.comp a ny.com”