Help setting up a Cisco 2514

[Lithium381]

I just started studying for my CCNA so i bought a used router off of ebay, a Cisco 2514. It has two ethernet ports(via AUI transeivers).

I currently have it setup:


DSL MODEM > Wireless router > 2514(via ethernet) > my PC


The issue i'm having is getting the PC to see the internet.
From the PC i can ping through to the 2514, both ethernet interfaces, but i cannot ping to the wireless router.
from the 2514 i can ping both the PC and the DSL modem, and the wireless router
from my wireless router, i can ping the 2514, but not my PC.


what am i doing wrong? why won't the 2514 pass my pings?

 

[xSauronx]

maybe you didnt setup the routes correctly?

 

[Lithium381]

Gateway of last resort is 192.168.0.1 to network 0.0.0.0
C 192.168.1.0/24 is directly connected, Ethernet0
172.16.0.0/18 is subnetted 1 subnets
C 172.16.64.0 is directly connected, Ethernet1
S* 0.0.0.0/0 [1/0] via 192.168.0.1
S 192.168.0.0/16 [1/0] via 192.168.1.1

--------------------------------------
DSL Modem: 192.168.0.1/16
Wireless: (WAN) 192.168.1.64/16
Wireless: (LAN)192.168.1.1/24
2514: (Wireless side) 192.168.1.63/24
2514: (PC side) 172.16.64.1/18
PC: 172.16.64.12/18

 

[drebo]

Your wireless router doesn't have a route back through the 2514 and therefore tries to send your ping echos (and indeed all your traffic) out through the WAN port, rather than back to the 2514 where they should go. You'll need to put a static route on the wireless router telling it how to get to the other network. Also, if it's not configured to NAT for that other network, you may run in to an issue there as well. If that's the case, you'll need to NAT on your 2514 as well (doing this will NOT require a static route on the wireless router).

Also, stick to /24s for everything starting out. Throwing around all those other subnet masks is only going to screw you up and confuse you. Use the "ip classless" global configuration command if your 2514 complains.

 

[mcmilljb]

Originally posted by: Lithium381
Gateway of last resort is 192.168.0.1 to network 0.0.0.0
C 192.168.1.0/24 is directly connected, Ethernet0
172.16.0.0/18 is subnetted 1 subnets
C 172.16.64.0 is directly connected, Ethernet1
S* 0.0.0.0/0 [1/0] via 192.168.0.1
S 192.168.0.0/16 [1/0] via 192.168.1.1

--------------------------------------
DSL Modem: 192.168.0.1/16
Wireless: (WAN) 192.168.1.64/16
Wireless: (LAN)192.168.1.1/24
2514: (Wireless side) 192.168.1.63/24
2514: (PC side) 172.16.64.1/18
PC: 172.16.64.12/18

Ok I misread your setup first time through. You first want to get rid of the overlapping subnets. Those are bolded. Make the wireless lan and the 2514 eth0 192.168.1.0/24. Then they're on the same subnet. Then the wireless wan port and the dsl modem can be on 192.168.0.0/24. You will need to add routes to the wireless router itself to make sure it can find the networks on the 2514. Initially I had the networks mixed up when I first read your post. You might want to minimize the subnets on the 2514 because if you want them to access the Internet, the wireless router will need to know where they are.

 

[Lithium381]

Unfortunatly, i cannot change the IP address of the DSL modem, and the IP it hands out is the 192.168.1.64 as a static addy.

THANK YOU DREBO!!! I added the routing table to my wireless and now everything is fine!!! I forgot about that completely, since I previously had RIPv1 installed, but forgot that i reset everything, and it had been disabled, now it's all good.

Thanks guys for all your help@!!

 

[drebo]

Lithium381, you might consider converting your DSL modem into a bridge or setting it up to hand a public IP off to your router. Both are possible and will likely simplify your setup (also getting rid of double NAT which could cause problems with other things).