Can't ping computer from 2501 router

[tthompson]

I have 2 2501 I using to brush up on my Cisco skills, here is my probem on router2 I have the E0 on Router2 connected to a my network hub with E0 having an ip address of 10.10.10.30/24. From either router3 or router 2 I can ping 10.10.10.30, but if I try to ping my computer (10.10.10.10) I get no response.

Thanks in advance

Terry

[thisisshanky]

Are you running Windows XP ? Have you checked to see if your firewall is turned on ?

[tthompson]

Hi Shanky,

Thanks for replying to my problem, to answer your question I don't run XP on that server, however I do have a firewall, I disabled the firewall and tried to ping the server from Router3 and Router2 and I still wasn't able to ping the server. I could ping E0 from router2 and Router3 however. Also at a CMD line on the server I'm able to ping the E0 port on Router2.

[tthompson]

Hi Shanky,

Thanks for replying to my problem, to answer your question I don't run XP on that server, however I do have a firewall, I disabled the firewall and tried to ping the server from Router3 and Router2 and I still wasn't able to ping the server. I could ping E0 from router2 and Router3 however. Also at a CMD line on the server I'm able to ping the E0 port on Router2.

[Kevin Dorrell]

You need to set the default gateway on your PC as 10.10.10.30 mask 255.255.255.0. I guess your PC does not know the route to 192.168.1.1. If you are pinging the PC from router3, the source of the pîng is 192.168.1.1. The PC does not know where to send its response.

BTW, with the config you have, some of the lines are redundant. Under router rip, you do not need any network commands unless you actually have those networks on the router.

Kevin Dorrell

Luxembourg

[tthompson]

Hi Kevin,

Thanks for your help, remembering to disable my norton firewall, plus adding the gateway (10.10.10.30) to the advance setting gave me the ability to ping from either Router2 and Router3 to the server and to ping from the server to either of the routers. Under router rip you are saying that I don't need the "network 10.0.0.0 and network 68.0.0.0"? What if I connect the E0 to my cable modem and add the line "ip address dhcp" is there any other setting I'm go to have to configure to make this setup work?

[Kevin Dorrell]

I take it that you cable modem goes towards your Internet provider. I guess you are going to have to ensure that you default route goes to your cable modem, and then do some sort of NAT towards the cable modem, because the ISP will not recognise your internal addresses. What sort of cable modem do you have? I don't have any experience with cable modems, but here is a document that might be useful:

http://www.cisco.com/warp/public/109/config_nat_on_cm.html

Kevin Dorrell

Luxembourg

[tthompson]

Hi Kevin,

I have a Toshiba cable modem that is position between the ISP (cox cable) and the router2. I also have an 806 router, that I purchased 2yrs ago I going to use that configuration as a model for router2 Take a look at this link, this is basiclly what I'm going to do. If you have any ideas please let me know.

Thanks Again

Terry

http://www.cisco.com/en/US/tech/tk86/tk89/technologies_configuration_example09186a0080094be1.shtml

[thisisshanky]

Terry,

Your link clearly indicates all that you need to setup your network with NAT to provide Internet access to your LAN. NAT will ensure that your inside network is translated to the public IP that you get via DHCP from your provider. Most cable modems/ are capable of obtaining an IP for you automatically. In this case you should be just setting your ethernet interface connected to the cable modem with "ip address dhcp".

But some providers give you a basic cable modem that just bridges traffic between the network side and user side. In this case your router might have to be setup for PPPOE to negotiate as well as authenticate yourself with the provider. SO you will have to add PPPOE configs on the cisco router.

You can use the configs on the 1600 router (configs will be similar on the 837 router) for PPPOE client configuration if your cable modem does not support configs for PPPOE client.

http://www.cisco.com/en/US/tech/tk86/tk808/technologies_configuration_example09186a008019e120.shtml

[tthompson]

Hi Skanky,

When I use my cisco 806 router I use the "ip address dhcp" on E0 and connected to the ISP's network without any issue, I'm going to give it a try tonight. I'll keep you posted

Thanks for you assistance.