| Author |
Help with 2501 configuration
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| Townsend 2003-02-22, 4:38 pm |
| I recently aquired 2 2501 routers. I've connected the serial ports with DCE/DTE crossover cable, and connected a computer to each of them with a crossover cable and tranceiver to the AUI port. I assigned the ip addresses and configured the routes. I can ping from router to router (even to the opposite interface on the opposite router) and I can ping from each host to the opposite interface on the adjacent router, but not to the next router.
Any advice from you guys would be appreciated. | |
| Sexy Lexy 2003-02-22, 5:50 pm |
| Are both serial interfaces on both routers up? I went through a steep learning curve a few weeks back with this.
Have you configured the respective ports to DCE and DTE?
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| Townsend 2003-02-22, 7:30 pm |
| Thanks for your reply. Yes, both serial interfaces are up, both protocols are up, and I set the clock rate on one to 64000 so it would act as the DCE device. The routers are talking fine. I tried configuring the routes both staticly and then with rip both worked fine. I can ping from either router to the adjacent router and to each adjacent host. I just can't ping the far router from either host.
Any advice? | |
| larkspur 2003-02-22, 10:11 pm |
| Sounds like you diffently got a routing problem.
I have setup routers like that before I used RIP for routing instead of static entries.
The only thing I did differnt than you was the clock rate, I set 56000. But that should not cause this issue. Check you IP stack again or maybe reload the Router that is the DCE. | |
| Townsend 2003-02-23, 5:12 pm |
| The routers can ping each other and their adjacent ethernet host, and I can ping the adjacent router from each host, but I still can't ping from a host to the second router. I have looked in both my Cisco book and Sybex book and can't figure out what to do. Please help if you can.
Thanks! | |
| Sexy Lexy 2003-02-23, 5:28 pm |
| I have 2 2503's and both serial ports connected with DCT DTE cables DTE to DCE on Serial 0 and DCE DTE on serial 1.
After setting up the IP routes on both routers I could ping the connecting network and the ethernet0 ports on each opposing router (As the Ethernet ports belong to a different network) but I can not ping any server or host that is on the same subnet that is past the router on the Ethernet 0 port.
Example, I can ping the Ethernet port with 223.168.100.20 and get a reply but if I attempt to ping anything else in the 223.168.100.0 network (/24 mask) then it returns:
Success rate is 0 percent (0/5)
For every host I try to ping.
Check your static route entries to see if there is a problem or if you have mis-typed the IP address as you can not be far wrong.
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| Townsend 2003-02-23, 6:02 pm |
| Thanks for the reply! I have the DTE end of the cable attached to the serial 0 port and the DCE end attached to the serial 1 port of the other router. Would this make a difference?
I've checked the routes over and over and then even let rip configure them just to make sure.
Host 1 is 169.254.10.2/24
RouterA e0 is 169.254.10.1/24
RouterA s0 is 169.254.20.1/24 (this one DTE)
RouterB s1 is 169.254.20.2/24 (this one DCE)
RouterB e0 is 169.254.30.1/24
Host 2 is 169.254.30.2/24
On RouterA
ip route 169.254.30.0 255.255.255.0 169.254.20.2
On RouterB
ip route 169.254.10.0 255.255.255.0 169.254.20.1 | |
| Townsend 2003-02-23, 6:56 pm |
| I'm still not having any success. Please help if you can. Thanks. | |
| larkspur 2003-02-23, 9:32 pm |
| The DCE needs to be on int s0 and DTE on int s1. Double check your default gateways on both computers and make sure your subnet mask is correct as well. | |
| Townsend 2003-02-24, 5:16 pm |
| I tried changing the DCE to the s0 and the DTE to the s1 and I still can't ping the hosts, even though I can ping the subnet to which they are attached. If anyone has any ideas I would really appreciate the help.
Thanks! | |
| Sexy Lexy 2003-02-24, 5:22 pm |
| Do you have your routers configured on a network that already has another router (DSL for example that connects you to the internet) as your gateway?
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| Townsend 2003-02-24, 5:26 pm |
| No, they are just alone with the a host connected to the ethernet port on each.
Did you ever get your 2503's so the could ping another host on the subnet besides the ethernet interface? | |
| larkspur 2003-02-26, 6:58 pm |
| I have done this in Cisco one. This scenario is the hands on test we had to take.
What are your three subnets?
Do a sh ip route and make sure that you have 3 route entries on both routers that are are the networks of your two lans and wan.
Also sometimes the simplest things we over look. Double check your cabling please I have seen that happen before.
Let em nknow. | |
| edmonds_robert 2003-02-27, 9:51 am |
| If you are configuring static routes, try disabling your rip configuration. If you are not redistributing static routes into rip, they will not work. Or use the redistribute static command. | |
| clarkv 2003-02-27, 10:50 am |
| I'm certainly NOT a seasoned Cisco professional, but I'm nearly finished with the Sybex study guide. Please forgive me if I'm repeating what the previous post was advising.
As I recall, you absolutely have to remove all static routes when you go to using RIP. Make sure you've done that. Then "sh ip route" to make sure both routers can see all remote networks. | |
| edmonds_robert 2003-02-27, 11:29 am |
| You only have to remove static routes if you are not redistributing them into RIP. There will always be cases where static routes are necessary. I would highly recommend this approach. Your config would look something like this:
router rip
network 192.168.0.0 255.255.255.0
redistribute static
default-metric 1
The default-metric 1 command tells the router the default metric for protocols redistributed into RIP. Since RIP has a maximum hop count of 15 (16 being infinite, or unreachable), Cisco recommends using a very low default-metric to avoid any problems. | |
| scamiho 2003-02-27, 2:15 pm |
| Hey, I screwed up and posted a new thread instead of replying to this one.... check new threads for the same title...
"check the physical".
I attached some notepad files that may help as a point of comparison. |
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