Is it possible??

[wannaciscobe]

Hi all,
I'm still trying to connect my 2501 to my cable modem in this fashion...

cable-modem----E0/2501/S0......S1/2501/E0....PC

Is this possible? I'm not having any luck in getting connectivity to the internet at all except thru the closest 2501 to the cable modem...

Thanks,
Bob

 

[rburke]

Well.... I was *hoping* that you had just forgot that statement and it worked now, but alas...

I wonder if the packets are getting out E0, but not getting back for some reason. In other words, it the NATing of the 192.168.0.0/24 is even happening. Let's try this..

-on R1 type the command "debug ip packet" - what it does is shows the info for every packet the router processes. A dangerous command if traffic was actually flowing, but since it isn't, it's safe.

-then on R2 do an extended ping: just type "ping" and then enter. It will then prompt you got the IP,repitition,datagram size,etc.
For IP to ping use an IP external to your network
For Repition, use between 20-30 reps
For datagram size use 500
For the rest of the prompts use the default by pressing enter

-then once it starts pinging, move your console connection back to R1 and see what is being printed out by the debug statements. Post what the debug statments display.


Right now I'm at work, when I get home I'll see if I can think of anything else.


Burke

 

[wannaciscobe]

rburke,
I changed my config to match yours and things got worse with the frame-relay...
I'm in the process of simplifying it but in the mean time here is the output of debug on R1
I don't know much but doesn't it look like the serial link is broken between the routers?

bob

1#
02:08:31: IP: s=24.210.114.50 (Serial0), d=216.230.32.10 (Ethernet0), g=216.230.
32.10, len 500, forward
02:08:31: IP: s=24.210.114.50 (Serial0), d=216.230.32.10 (Ethernet0), len 500, e
ncapsulation failed
R1#
02:08:33: IP: s=24.210.114.50 (Serial0), d=216.230.32.10 (Ethernet0), g=216.230.
32.10, len 500, forward
02:08:33: IP: s=24.210.114.50 (Serial0), d=216.230.32.10 (Ethernet0), len 500, e
ncapsulation failed
R1#un
02:08:35: IP: s=24.210.114.50 (Serial0), d=216.230.32.10 (Ethernet0), g=216.230.
32.10, len 500, forward
02:08:35: IP: s=24.210.114.50 (Serial0), d=216.230.32.10 (Ethernet0), len 500, e
ncapsulation failedd
R1#undebug all
All possible debugging has been turned off
R1#
02:08:37: IP: s=24.210.114.50 (Serial0), d=216.230.32.10 (Ethernet0), g=216.230.
32.10, len 500, forward
02:08:37: IP: s=24.210.114.50 (Serial0), d=216.230.32.10 (Ethernet0), len 500, e
ncapsulation failed

 

[rburke]

OK, here you go.... I now have the exact setup as you, ignoring the ISPs... As of right now I am using the connection to post this reply, so it works.

R1:

Current configuration : 979 bytes
!
version 12.2
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R1
!
logging rate-limit console 10 except errors
!
ip subnet-zero
no ip finger
ip name-server <optional primary DNS here>
ip name-server <optional second DNS here>
!
no ip dhcp-client network-discovery
!
!
!
!
interface Ethernet0
mac-address 0080.c6ea.fa3e
ip address dhcp
ip nat outside
no cdp enable
!
interface Serial0
ip address 10.10.10.1 255.255.255.0
ip nat inside
clockrate 2000000
!
interface Serial1
no ip address
shutdown
!
ip kerberos source-interface any
ip nat inside source list 1 interface Ethernet0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 Ethernet0
ip route 192.168.0.0 255.255.255.0 Serial0
no ip http server
!
access-list 1 permit 192.168.0.0 0.0.0.255
access-list 1 permit 10.10.10.0 0.0.0.255
!
!
line con 0
transport input none
line aux 0
line vty 0 4
login
!
end


R2:

Current configuration : 666 bytes
!
version 12.2
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R2
!
logging rate-limit console 10 except errors
!
ip subnet-zero
no ip finger
ip name-server <optional primary DNS here>
ip name-server <optional second DNS here>
!
no ip dhcp-client network-discovery
!
!
!
!
interface Ethernet0
ip address 192.168.0.1 255.255.255.0
!
interface Serial0
no ip address
shutdown
!
interface Serial1
ip address 10.10.10.2 255.255.255.0
!
ip kerberos source-interface any
ip classless
ip route 0.0.0.0 0.0.0.0 Serial1
no ip http server
!
!
!
line con 0
transport input none
line aux 0
line vty 0 4
!
end


A few things. First, this is almost an exact copy of what you had, really the only thing I did was add the DNS, but also corrected the ACL 1 in R1. The ACL 1 in R1 didn't have the wildcard mask (0.0.0.255 = Class C) at the end of it in your config, which could have led to the problem, ut then again, you might have had it and it didn't copy. Also in the ACL I added the subnet 10.10.10.0/24 so that you could ping from R2 out to the internet. I also used the &quot;no ip http server&quot; since it is a pretty big security hole. Other than that, it is primarily the same thing. My test computer has static IP address, Gateway, and DSN, just like you said yours would be setup. So try to copy these configs straight into your routers, and if that doesn't work, then it could possily be a ISP issue. But try this, and we will see what is next(hopefully this will fix it though).

Burke

 

[wannaciscobe]

rburke,
HOORAY! I got it to work...I used the last config with the corrected wildcard statments...I think that might have been it partially...
I erased the config and reloaded the router and put this config in and viola! it works...so maybe something was stopping connectivity but was not readily apparent in the config printed out online??

thanks for all your help...I really appreciate you going the extra mile for a green-horn.....newbie.....


I'm going to take this weekend and maybe try and pin-point why it's working.....

thanks again...and you too wybenormal....!!!!

bob

 

[rburke]

Good, glad to hear it is working.

Burke

 

[wybnormal]

Glad it's working.. think about how much everyone learned ;-)

MikeS
Find me at

http://www.packetattack.com

&quot;Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots.&quot;
Sun Tzu

 

[jjjthird]

wannaciscobe, I have a 2501 a 2524 and a 1900 switch. My problem is the connectors that go from the cable modem to the router. How and where do I find a place to buy these ?

Simple question. I'll have fun with config'ing once I get there I'm sure.

thanks in advance
Joe J