Hey everybody,
I've got a case where a DNS is not working in the router, I have read some things found on google but I still can't make it work... that's why I'm here and hope you could help.
I issued a debug ip udp to check how the conversion was being made and it seems that the DNS server responds but still does not resolve to the router, I just want to know if it's the DNS or the Router (or both) who are doing this weird behavior.
Here's the output generated with a ping
MGCAM_CEN_90713#ping yahoo.com
Translating "yahoo.com"...domain server (200.35.65.3) (200.35.65.4) (200.44.32.12)
*Jun 30 13:09:50.710: UDP: rcvd src=10.10.16.79(68), dst=255.255.255.255(67), length=308
*Jun 30 13:09:50.710: UDP: rcvd src=10.10.16.12(67), dst=255.255.255.255(68), length=308
*Jun 30 13:09:51.566: UDP: Random local port generated 56573, network 1
*Jun 30 13:09:51.566: Reserved port 56573 in Transport Port Agent for UDP IP type 1
*Jun 30 13:09:51.566: UDP: sent src=10.18.121.242(56573), dst=200.35.65.3(53), length=35
*Jun 30 13:09:51.650: UDP: rcvd src=200.35.65.3(53), dst=10.18.121.242(56573), length=35
*Jun 30 13:09:51.650: Released port 56573 in Transport Port Agent for IP type 1
(This is where It seems that the DNS responds to the router but still gives me error at the end)
*Jun 30 13:09:51.650: UDP: Random local port generated 52775, network 1
*Jun 30 13:09:51.650: Reserved port 52775 in Transport Port Agent for UDP IP type 1
*Jun 30 13:09:51.650: UDP: sent src=10.18.121.242(52775), dst=200.35.65.4(53), length=35
*Jun 30 13:09:51.694: UDP: rcvd src=200.35.65.4(53), dst=10.18.121.242(52775), length=35
*Jun 30 13:09:51.694: Released port 52775 in Transport Port Agent for IP type 1
*Jun 30 13:09:51.694: UDP: Random local port generated 59654, network 1
*Jun 30 13:09:51.694: Reserved port 59654 in Transport Port Agent for UDP IP type 1
*Jun 30 13:09:51.698: UDP: sent src=10.18.121.242(59654), dst=200.44.32.12(53), length=35
*Jun 30 13:09:51.822: UDP: rcvd src=0.0.0.0(68), dst=255.255.255.255(67), length=556
*Jun 30 13:09:51.822: UDP: rcvd src=10.10.16.12(67), dst=255.255.255.255(68), length=319
*Jun 30 13:09:54.218: UDP: rcvd src=10.10.16.84(68), dst=255.255.255.255(67), length=308
*Jun 30 13:09:54.218: UDP: rcvd src=10.10.16.12(67), dst=255.255.255.255(68), length=308
*Jun 30 13:09:54.218: UDP: rcvd src=0.0.0.0(68), dst=255.255.255.255(67), length=556
*Jun 30 13:09:54.222: UDP: rcvd src=10.10.16.12(67), dst=255.255.255.255(68), length=319
*Jun 30 13:09:54.698: UDP: sent src=10.18.121.242(59654), dst=200.44.32.12(53), length=35
*Jun 30 13:09:56.198: UDP: rcvd src=0.0.0.0(68), dst=255.255.255.255(67), length=556
*Jun 30 13:09:56.198: UDP: rcvd src=10.10.16.12(67), dst=255.255.255.255(68), length=319
*Jun 30 13:09:57.698: UDP: sent src=10.18.121.242(59654), dst=200.44.32.12(53), length=35 (4.2.2.2)
*Jun 30 13:09:59.222: UDP: rcvd src=200.71.149.93(137), dst=200.71.149.95(137), length=58
*Jun 30 13:09:59.974: UDP: rcvd src=200.71.149.93(137), dst=200.71.149.95(137), length=58
*Jun 30 13:10:00.698: Released port 59654 in Transport Port Agent for IP type 1
*Jun 30 13:10:00.698: UDP: Random local port generated 52659, network 1
*Jun 30 13:10:00.698: Reserved port 52659 in Transport Port Agent for UDP IP type 1
*Jun 30 13:10:00.698: UDP: sent src=10.18.121.242(52659), dst=4.2.2.2(53), length=35
*Jun 30 13:10:00.722: UDP: rcvd src=200.71.149.93(137), dst=200.71.149.95(137), length=58
*Jun 30 13:10:03.698: UDP: sent src=10.18.121.242(52659), dst=4.2.2.2(53), length=35
*Jun 30 13:10:06.698: UDP: sent src=10.18.121.242(52659), dst=4.2.2.2(53), length=35
% Unrecognized host or address, or protocol not running.
And here's the sh run (edited of course):
MGCAM_CEN_90713#sh run
Building configuration...
Current configuration : 2687 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname MGCAM_CEN_90713
!
boot-start-marker
boot-end-marker
!
enable secret 5
!
no aaa new-model
ip cef
!
!
!
!
ip name-server 200.35.65.3
ip name-server 200.35.65.4
ip name-server 4.2.2.2
!
!
!
!
interface FastEthernet0/0
description CONEXION LAN
ip address
no ip redirects
no ip unreachables
no ip mroute-cache
speed 100
full-duplex
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0/0
description CONEXION A INTERNET MOVISTAR
no ip address
encapsulation frame-relay IETF
no ip route-cache cef
no ip route-cache
frame-relay lmi-type cisco
!
interface Serial0/0/0.16 point-to-point
ip address 10.18.121.242 255.255.255.252
no ip route-cache
frame-relay interface-dlci 16
!
interface Serial0/1/0
no ip address
encapsulation frame-relay IETF
no ip route-cache cef
no ip route-cache
frame-relay lmi-type cisco
!
interface Serial0/1/0.20 point-to-point
description CONEXION MG MOTORES
ip address 10.10.10.6 255.255.255.252
no ip route-cache
no ip mroute-cache
frame-relay interface-dlci 20 IETF
!
router eigrp 1
network 10.0.0.0
network 128.180.0.0
no auto-summary
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 10.18.121.241
!
ip http server
!
!
control-plane
!
!
line con 0
password 7
login
line aux 0
line vty 0 4
password 7
login
!
scheduler allocate 20000 1000
end
Any help would be extremeley appreciated.
Thank You
Antonio Hurtado
