Defining DNS on a 3550 switch

Question

I have three 3550 switches and want to define a DNS server on one of my switches (172.16.2.10). I have done the following in the DNS switch:
3550(config)#ip domain-lookup
3550(config)#ip host Setad 172.16.8.2
3550(config)#ip host MAVAD 172.16.5.2
3550(config)#ip domain-name cressnet.com
I have done the following on the 172.16.5.2 (MAVAD) switch (one that is not a DNS):
3550(config)#ip domain-lookup
3550(config)#ip name-server 172.16.2.10
3550(config)#ip domain-name cressnet.com
In normal operation I can telnet from 172.16.5.2 to 172.16.8.2; but in this situation, when I issue the "Setad" to telnet Setad (172.16.8.2) from the 172.16.5.2, nothing happens.
Please help!
Thanks.

Answer 1

Thanks for your reply.
My DNS server switch hostname is "MUT-FIBER-SWITCH" and its IP address is 172.16.2.10. Look at the DNS configuration in this switch:
MUT-FIBER-SWITCH#sh hosts
Default domain is not set
Name/address lookup uses domain service
Name servers are 255.255.255.255
Host Port Flags Age Type Address(es)
Setad None (perm, OK) 44 IP 172.16.8.2
MAVAD None (perm, OK) 0 IP 172.16.5.2
I have set the following configuration in the MAVAD switch:
MAVAD(config)#ip domain-lookup
MAVAD(config)#ip name-server 172.16.2.10
and
MAVAD:#ping 172.16.2.10
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.2.10, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
and
MAVAD:#ping 172.16.8.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.8.2, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
and
MAVAD:#telnet 172.16.8.2
Trying 172.16.8.2 ... Open
Welcome To Master Switch In SETAD
Username: Malek
Password:
SETAD>exit
but
MAVAD:#Setad
Translating "Setad"...domain server (172.16.2.10)
% Unknown command or computer name, or unable to find computer address
and
MAVAD:#ping setad
Translating "setad"...domain server (172.16.2.10)
% Unrecognized host or address, or protocol not running.