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27354
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30
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16
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jfriend29
Beginner

Router can't resolve domain names

First off I'm a cisco noob so I relialize I'm probably asking a rediculous question.  I am currently setting up a UC540 that I bought used that does not have a configuration. The problem I have encountered is the router is capable of pinging IP addresses but is unable to ping domain names. Furthermore I am unable to access internet resources from my workstation that is directly connected to the router. The router is directly connected to my cable modem.

I started over again from scratch and only have what I believe to be the bare minimum in the config to get started. My current config is as follows:

Building configuration...


Current configuration : 1849 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
!
!
!
!
dot11 syslog
ip source-route
ip cef
!
!
!
!
ip name-server 207.255.0.130
ip name-server 207.255.0.131
no ipv6 cef
!
!
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
voice-card 0
!
!
!
license udi pid UC540W-FXO-K9 sn FGL160527A1
!
!
!
archive
log config
  hidekeys
!
!
!
!
!
interface FastEthernet0/0
ip address 72.28.*.* 255.255.255.0
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
!
interface Integrated-Service-Engine0/0
no ip address
shutdown
!
!
interface FastEthernet0/1/0
!
!
interface FastEthernet0/1/1
!
!
interface FastEthernet0/1/2
!
!
interface FastEthernet0/1/3
!
!
interface FastEthernet0/1/4
!
!
interface FastEthernet0/1/5
!
!
interface FastEthernet0/1/6
!
!
interface FastEthernet0/1/7
!
!
interface FastEthernet0/1/8
!
!
interface Dot11Radio0/5/0
no ip address
shutdown
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
station-role root
!
!
interface Vlan1
ip address 192.168.10.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 72.28.*.*
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
!
voice-port 0/0/0
!
voice-port 0/0/1
!
voice-port 0/0/2
!
voice-port 0/0/3
!
voice-port 0/1/0
!
voice-port 0/1/1
!
voice-port 0/1/2
!
voice-port 0/1/3
!
voice-port 0/4/0
auto-cut-through
signal immediate
input gain auto-control
description Music On Hold Port
!
!
!
!
!
!
line con 0
no modem enable
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
line vty 0 4
login
!
end

  

Any help would be greatly appreciated.

THANKS!

16 REPLIES 16
Uriah Erter
Beginner

I am experiencing similar issues in my envoironment, but for me the issue seems to be only 1 FQDN and only on 1 router in my network. When I ping time.nist.gov on this router it tries to resolve it to an ipv6 address which leads to the following:

router1#ping time.nist.gov

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2610:20:6F15:15::27, timeout is 2 seconds:

% No valid route for destination
Success rate is 0 percent (0/1)

But when I ping other sites:

router1#ping yahoo.com
Translating "yahoo.com"...domain server (10.1.253.10)

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 98.138.253.109, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 108/134/152 ms

I have ipv6 disabled over my entire network and this is the only device experiencing this. Where is this coming from?

Uriah,

Try the ping ip (host name) command instead of just ping.

If you want to ping an ipv6 host you use the ¨ping ipv6 (hostname)¨ command for ipv4: ping ip ...

Let me know how it went...