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Connecting token ring and ethernet

By rkc01 ·
Has anyone ever connected a token ring lan and ethernet lan using nt workstation 4.0?
I have ip forwarding enabled and am using the ip address of each nic as the default gateway of the other. The token ring segment uses a class a address scheme and the ethernet segment uses a class c address scheme, (using the appropirate subnet masks). I don't have physical access to any nodes on the token ring segment but I am unable to ping any node on the token ring segment from the ethernet segment. Ican ping the token ring nic in the multi-homed workstation from any node on the ethernet segment. When I run a tracert on an address for the token ring it sends it to the default gateway on the multihomed box but every hop there after times out. It seems as
if the frame conversion isn't being done? I am able to ping any address for either network from the multi-homed machine. Any suggestions would be greatly appreciated as I've exhausted my resources.

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Connecting token ring and ethernet

by Barry Hensley In reply to Connecting token ring and ...

1. The NT server is aware of both networks. So, when a data packet destined for network B arrives on the NIC for network A, NT will know how to route the packet. Use the ROUTE command to verify routing entries. This command will list the known routes, showing a route to network A through the NIC attached to network A and a route to network B through the NIC attached to network B.

2) If you can ping hosts on both networks from the NT server, then your network connectivity is working properly.However, if you cannot ping a host on A from a host on B, then you have a routing problem. The problem may not be with your NT server. Check the default route entry for the hosts on both nets.

You said that you do not have access to the hosts on the Token-Ring network. If you cannot access one of these hosts, then you will need to contact the Sys Admin for that LAN and verify the default gateway for these hosts. In order for routing to work properly in your scenario, the hosts on network A must have the NIC in the server that is attached to network A as their default gateway and the hosts on network B must have the NIC in the server that is attached to network B as their default gateway.

For example, if the hosts on the Token-Ring network are using an address other than the NT server as their default gateway, then when you attempt to ping one of these hosts from a host on the Ethernet network, the host on the Token-Ring network will not know how to properly reply because it willbe attempting to send a response back to the Ethernet network through the wrong default gateway. I suspect that this is your problem. Even with the wrong default gateway, you will be able to ping these hosts from your NT server because they share addresses on the same segment.

To fully implement routing on your NT server, you should look at MPR or RRAS so that basic routing protocols like OSPF or RIP can be supported.

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Connecting token ring and ethernet

by rkc01 In reply to Connecting token ring and ...

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Connecting token ring and ethernet

by tbradley In reply to Connecting token ring and ...

It can be done, but without the investment in a token ring to ethernet Bridge or Router, the best you can hope for is a band-aid solution.

I was able to do it in Netware by putting both a Token Ring and Ethernet Nic in a file server, moving the server over to the Token Ring segment, then running some temporary cat5 cable to the Ethernet Segment.

Both cards were set up 802.2 and 802.3, Ethernet II, and Snap. Both cards used the same subnet and default gateway ( cisco 4500 on the ethernetsegment ).

Software routing was turned on in the server, with 2 "next" hops, those being the other nic and the router.

I never could get the Token Ring segment to logon to the server using IP, but IPX worked fine for the connection. IP worked for Internet and TCP/IP printing, so I took it as a win, and held my breath until we could afford a cabling conversion to Cat-5

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Connecting token ring and ethernet

by rkc01 In reply to Connecting token ring and ...

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Connecting token ring and ethernet

by rkc01 In reply to Connecting token ring and ...

This question was closed by the author

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Connecting token ring and ethernet

by rkc01 In reply to Connecting token ring and ...

bhensley@intellify.com did give me helpful information and I replied as such. He should have received the 150 points. I must have done something wrong when I closed the question. Would techrepublic please correct the situation. Thank you.

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Connecting token ring and ethernet

by rkc01 In reply to Connecting token ring and ...

I've sent a request to techrepublic and asked them to correct the problem, sorry bhensley.

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