Not able to get Internet access

[ndinc]

From within the router I cannot ping DNS (outside, ISP) but can ping the core gateway router.

The serial coonection are connected to our remote office that I just got up this weekend. I can telnet between serial int and ping the ethernet side no problem. Ultimately we want internet across the serial int.

I did receive a "lost in transite error" to x.x.x.81 when I tried to ping from a workstation on the remote office which tells me its a routing issue.

Any input?

GeminiT1#ping x.x.x.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to x.x.x.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/5/8 ms
router#

router#ping x.x.x.30 (DNS Servers)

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to x.x.x.30, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

GeminiT1#sh run
Building configuration...

Current configuration : 1216 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
ip subnet-zero
!
ip name-server x.x.x.x
!
ip audit notify log
ip audit po max-events 100
!
call rsvp-sync
!
!
interface Ethernet0/0
description Route to Fiber Core
ip address x.x.x.85 255.255.255.252
full-duplex
!
interface Serial0/0
description t-1 to Pullman
ip address x.x.x.81 255.255.255.252
service-module t1 clock source internal
service-module t1 remote-alarm-enable
!
interface Ethernet0/1
description Internal network (management only)
ip address 10.0.0.85 255.255.255.0
full-duplex
!
interface Ethernet1/0
no ip address
shutdown
half-duplex
!
router rip
version 2
network x.x.x.x
network x.x.x.x
no auto-summary
!
ip classless
ip route 0.0.0.0 0.0.0.0 Ethernet0/0
ip route 0.0.0.0 0.0.0.0 Serial0/0
ip http server
!
dial-peer cor custom
!
!
line con 0
exec-timeout 0 0
password
login
line aux 0
line vty 0 4
password
login
!
end

 

[vlan52]

Hi ndinc,
Please excuse my humble question here, but why do you have two default routes pointing to different interfaces?

ip route 0.0.0.0 0.0.0.0 Ethernet0/0
ip route 0.0.0.0 0.0.0.0 Serial0/0

Also, could you please add the IP blocks instead of using x.x.x.? It would make it much easier to troubleshoot.

Thanks in advance.

vlan52
The end of wisdom is freedom. The end of culture is perfection. The end of
education is character. The end of knowledge is love.

 

[plshlpme]

your old default route that was via the ethernet will need to be removed then if you want internet to be over the serial.

what else do you need to access via the ethernet interface?
and are you runnign rip over that interface?

 

[ndinc]

ip route 0.0.0.0 0.0.0.0 Ethernet0/0
ip route 0.0.0.0 0.0.0.0 Serial0/0

Removed.

No rip.

network x.x.x.x
network x.x.x.x

removed.

I reloaded the router. No I cannot ping to the Ethernet side of the remote office. But I can ping to the Serial side.

I will add random IP blocks to make it easier on the next post and add the requested changes tot e config's

Thanks...Stand by

 

[ndinc]

GeminiT1#ping 68.4.16.30 (DNS Servers)

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 68.4.16.30, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

GeminiT1#sh run
Building configuration...

Current configuration : 1216 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
ip subnet-zero
!
ip name-server 68.4.16.30
!
ip audit notify log
ip audit po max-events 100
!
call rsvp-sync
!
!
interface Ethernet0/0
description Route to Fiber Core
ip address 10.2.2.85 255.255.255.252
full-duplex
!
interface Serial0/0
description t-1 to Pullman
ip address 10.2.2.81 255.255.255.252
service-module t1 clock source internal
service-module t1 remote-alarm-enable
!
interface Ethernet0/1
description Internal network (management only)
ip address 10.0.0.85 255.255.255.0
full-duplex
!
interface Ethernet1/0
no ip address
shutdown
half-duplex
!
router rip
version 2

no auto-summary
!
ip classless
ip http server
!
snmp-server community public RO
snmp-server location Irvine
snmp-server enable traps tty
!
dial-peer cor custom
!
!
line con 0
exec-timeout 0 0
password
login
line aux 0
line vty 0 4
password
login
!
end

 

[vlan52]

In order to ping the Ethernet block in the remote office, that particular router will need at least one default router. I'd suggest:

ip route 0.0.0.0 0.0.0.0 Serial0/0

You don't need a default route or any other route to/from the Ethernet interface at the remote router since it is direclty connected.

Please let us know how it goes.


vlan52
The end of wisdom is freedom. The end of culture is perfection. The end of
education is character. The end of knowledge is love.

 

[plshlpme]

you will need some sort of routing at the other end of the link as well. that is why your pings will not work.

be it static routes or rip routing you need to ensure that the other office has a route back to this location.

 

[ndinc]

I added the following;

ip route 0.0.0.0 0.0.0.0 E0/0

Now I am able to ping to DNS and gateway, no problem. And I am now able to telnet remotely from outside to the E0/0 ( I wasnt able to before).

One router down.

Now I am going to address the routes on the other remote office to see what I come up with.

I will try a few things and cut and paste the configs if I have an issue.

Thank you for the xtra help.

 

[plshlpme]

that route is not the answer if you want to get internet access over the serial link because all requests that the router gets will go over the e0/0 link now.

 

[ndinc]

plshlpme

What do you suggest to get Internet access over the Serial link?

Is there a way to indicate a gateway?

Thanks.

 

[vlan52]

I'm glad it is working now!

Have a great day ndinc.

vlan52
The end of wisdom is freedom. The end of culture is perfection. The end of
education is character. The end of knowledge is love.

 

[plshlpme]

vlan52
the route
ip route 0.0.0.0 0.0.0.0 s0/0

is a default route so it will be the gateway for the router.

so if you want to use all static routes you need to put in more specific routes for your other subnets that you are using

ie 192.168.1.0 255.255.255.0 e0/0

that route will only route the 192.168.1.0/24 subnet
the 0.0.0.0 0.0.0.0 is a catchall route that it will use if no other route exists..


so the default route is what you will use for the internet access

now as i said before whatever you are connected to on the other end of that new s0/0 will need routing information to get the packets back to this site.


so if on your router your clients are using a class c subnet like 192.168.2.0/24 your other router will need a route like

ip route 192.168.2.0 255.255.255.0 s0/0 (whatever interface its connected to)

do you follow what im trying to say?

right now you have it semi working via that default route... but i really don't think thats the solution you want.

if you want more assistance i think youll need to draw up a picture with the interfaces that the links are attached to and relevant ips.. then we can build the configs out properly.

 

[vlan52]

plshlpme"
I know it is a default route and it is all "ndinc" needed to correct the previous situation.

Now everything is reacheable and he can make proper corrections.

Once "ndinc" confirms he needs static routes or any routing protocol set up in order to provide routes back to the other side, we can make proper changes and suggestions.

Thanks.



vlan52
The end of wisdom is freedom. The end of culture is perfection. The end of
education is character. The end of knowledge is love.

 

[plshlpme]

vlan52
ya i don't know why your name was at the top of my post..
that wasn't meant for you...
sorry man.

 

[ndinc]

The T1 is up and running smooth. I took your advise and had to recreate seperate routes for all interfaces. It made alot of sense and I learned much.

Thank for you extra effort.

 

[plshlpme]

good stuff.