| [Connection Sharing] 2 Cisco 2921 Routers connected together thr I have the following configuration:
Location 1 - Internet access via AT&T through a Cisco 1841 serving the entire business.
Then we have a second Cisco 2921 Router at this location that is connected via Point-to-Point T1's.
Location 2 - No internet but we have another Cisco 2921. We can manually configure a laptop on either side and ping the Cisco routers.
Location 1 Cisco 2921 IP is 10.10.10.1 and Location 2 IP is 10.10.20.1.
Location 1: We have a separate router setup with internet access at 10.10.10.254 and DHCP is configured and when we plug a laptop into it we get an address of 10.10.10.101 and we can browse the internet, we can ping 10.10.20.1 (Location 2 Cisco).
Location 2: We have a router attached to the Cisco 2921 configured at 10.10.20.254. From Location 1 we can ping 10.10.20.254 no problem. From Location 2 we can ping 10.10.10.254, we can even go in through a browser and admin the router at location 1.
But when we configure a laptop at Location 2 for internet access using a gateway of 10.10.10.254 we get no access.
Any ideas how this should be setup to work?
Thanks
Brad
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Brad |
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bdnhsv
join:2012-01-20
Huntsville, AL | Re: [Connection Sharing] 2 Cisco 2921 Routers connected together what are the subnet masks associated with the routers? |
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| 255.255.255.0
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Brad |
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bdnhsv
join:2012-01-20
Huntsville, AL | OK - the GW for your laptop at location 2 then should be 10.10.20.254. Each location is a separate network. |
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| Does our router with internet access need to have a static route back to location 2?
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Brad |
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bdnhsv
join:2012-01-20
Huntsville, AL | It depends on whether you're running a L3 protocol on the boxes or not. If so, the routing protocol will learn the route, if not then you'd have a static routes on both ends pointing to the other side. |
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bdnhsv
join:2012-01-20
Huntsville, AL | reply to mdntblu
"show ip route" from the cli to see what the routing tables on the boxes have in them. |
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| Location 1: Internet router is Linksys RV082
Location 2: Router behind Cisco is Linksys WRT54GL.
What settings on these routers needs to be setup?
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Brad |
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bdnhsv
join:2012-01-20
Huntsville, AL | why are you using the cheap consumer routers in addition to the 2921's? The 2921's have the capabilities to handle all the routing and dhcp. If you need the others for WAP's then put them in bridge mode and hang them off the 2921's just for that. As for the cisco configs - do you have any experience with cisco iOS? If not, then I'm probably going to recommend you find an IT contractor close to you and let them come help you. |
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| We would love to use the 2921's but AT&T has them locked down and used specifically for the point-to-point tunnel. We have to provide our own routers on the local side.
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Brad |
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bdnhsv
join:2012-01-20
Huntsville, AL | OK - I misunderstood the situation. That will change things. The default GW msg from earlier would still be the same. Let me think about the rest for a while. |
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| Ok. Thanks.
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Brad |
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bdnhsv
join:2012-01-20
Huntsville, AL | reply to mdntblu
Are you sure the 2 2921's have 10.x.x.x addresses? That a private network. I'd expect them to be using public IP's that you would use as the default GW on each side for your WAP's. Also how is the 1841 connected into all this? Can you draw a quick diagram? |
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| They are most definately 10.'s. they are not connected to the Internet. Just a tunnel for us.
The other router is for something else. Basically at location 1 we have AT&T UVerse 2Wire that is being fed to the linksys rv082. I can't draw a diagram right now cause I'm on the road.
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Brad |
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bdnhsv
join:2012-01-20
Huntsville, AL | Alright. The 2921's are your default GW for your routers on each end of your tunnel. So use 10.10.20.1 as the default GW on the WAN interface of the wrt54 and choose another private network for the LAN side (10.2.x.x, 192,168.x.x, etc.). At location 1 use 10.10.10.1 as the default GW for the interface that is connected from your rv082 to the 2921, and again then have another network for your LAN (192.168.x.x or whatever). The other WAN interface of your rv082 that is connected to the 1841 should remain as is. That should allow internet access. |
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BinkVillains... knock off all that evil
join:2006-05-14
Denver, CO
kudos:4 | reply to mdntblu
What? How about a diagram? |
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jimbopalmerTsar of all the Rushers
join:2008-06-02
Greenwood, MS
kudos:2 | reply to mdntblu
Here is the advanced routing page on the RV082, if you turn on RIP on all 3 routers, (sorry, it is the only protocol the RV082 knows) or put a static route in for the 10.10.20.0 network via 10.10.10.1, mask 255.255.255.0 I think the internet will work for location 2.
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I tried to remain child-like, all I achieved was childish. |
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jimbopalmerTsar of all the Rushers
join:2008-06-02
Greenwood, MS
kudos:2 | reply to mdntblu
Here is my vision of the network in question
Green is ethernet
Yellow is point to point
dashed is Cable or DSL, I was not sure how they get to the internet |
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| Ok we talked to AT&T and found out that they didn't even setup the Gateway of Last Resort on either of the 2921 routers. They are going to do that and we also found out from 3 network engineers that RV082 won't even do what we need it to do because it can't support multiple subnets.
We are now going to use a Sonicwall instead.
Once AT&T sets up the Gateways correctly everything will work.
Thanks for all your help.
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Brad |
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| reply to jimbopalmer
This is exactly what we have for a configuration.
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Brad |
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