DNS ipv4

DNS ipv4

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R2(config)#ip dns server
R2(config)#ip host server1.bubba.com 10.2.2.2
R2(config)#int loopback 6783

R2(config-if)#ip add 10.2.2.2 255.255.255.255
R2(config-if)#^Z

R2#ping server1.bubba.com

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
R2#

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R1(config)#ip domain lookup
R1(config)#do ping 10.0.0.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/76/96 ms

R1(config)#ip name-server 10.0.0.2
R1(config)#ip route
R1(config)#ip route 0.0.0.0 0.0.0.0 10.0.0.2
R1(config)#end
R1#
*Mar  1 00:15:12.887: %SYS-5-CONFIG_I: Configured from console by console

R1#debug ip udp
UDP packet debugging is on

R1#ping server1.bubba.com

Translating “server1.bubba.com”…domain server (10.0.0.2) [OK]

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/68/120 ms
R1#
*Mar  1 00:18:18.059: UDP: Random local port generated 56090, network 1
*Mar  1 00:18:18.059: Reserved port 56090 in Transport Port Agent for UDP IP type 1
*Mar  1 00:18:18.063: UDP: sent src=10.0.0.1(56090), dst=10.0.0.2(53), length=43
*Mar  1 00:18:18.119: UDP: rcvd src=10.0.0.2(53), dst=10.0.0.1(56090), length=59
*Mar  1 00:18:18.123: Released port 56090 in Transport Port Agent for IP type 1