Solved

NT TCP/IP Routing problems with multiple network cards

Posted on 1998-05-22
2
413 Views
Last Modified: 2013-12-23
I have two NT servers ('A' and 'B'),  each with 3 network cards. I have configured TCP addresses as below and have RIP installed on both servers, with IP forwarding enabled. The subnet mask is set to 255.255.255.0 on all interfaces, including the clients.

My problem is that machines can only see (ping) machines on the same subnet. Trying to ping C1 from C2 or C4 from A doesn't work reporting no route to host.


                                       'A'         192.168.2.x           'B'
192.168.1.x   C1  ---------+---------------------------------+---------  C4 192.168.4.x
                                        |                                           |
                                        | 192.168.5.x                       |  192.168.3.x
                                      C2                                        C3              

Server 'A' has NICs with addresses 192.168.1.1, 192.168.2.1 and 192.168.5.1
Server 'B' has NICs with addresses 192.168.3.1, 192.168.4.1 and 192.168.2.2
The clients are configured with an appropriate address for each subnet.

What should the correct subnet mask and default gateways be for each of  the NT server interfaces and the clients? Does the fact that I am using private IP addresses cause problems with the routing?

Thanks for any help,

Ron

0
Comment
Question by:omega1
2 Comments
 
LVL 2

Accepted Solution

by:
tonp earned 150 total points
ID: 1562600
Your easiest solution here would be to make it a class B network, using 172.16.x.x and a netmask of 255.255.0.0. That way, they all have the same network number and are able to cummunicate with each other. (There's no need to change the IP number for this to work of course, so you can try this out with the 192.168.x.x numbers first).
If that's not what you want, is probably best to set up different routes for each netid. Using the route command (from a command prompt just type 'route') you can manually add the various gateways. For example, on machine A you need to add a route for 192.168.1.0 (255.255.255.0) with the exact IP number for the 192.168.1.x NIC (should also work with the 192.168.2.x address I guess). To reach machine B's 192.168.4.x, add a route specifying machine's B 192.168.2.x exact IP address for 192.168.4.0.

0
 

Author Comment

by:omega1
ID: 1562601
I think this may have worked, however I found that the problem was actually the default gateways on each of the NICS.

192.168.1.1 - Should have no gateway
192.168.5.1 - Should have no gateway
192.168.2.1 - Gateway 192.168.2.2
192.168.2.1 - Gateway 192.168.2.1
192.168.3.1 - Should have no gateway
192.168.4.1 - Should have no gateway


Having changed the settings to match these, the routing now works.

Thanks for the help.

0

Featured Post

NFR key for Veeam Backup for Microsoft Office 365

Veeam is happy to provide a free NFR license (for 1 year, up to 10 users). This license allows for the non‑production use of Veeam Backup for Microsoft Office 365 in your home lab without any feature limitations.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

FIPS stands for the Federal Information Processing Standardisation and FIPS 140-2 is a collection of standards that are generically associated with hardware and software cryptography. In most cases, people can refer to this as the method of encrypti…
Nslookup is a command line driven utility supplied as part of most Windows operating systems that can reveal information related to domain names and the Internet Protocol (IP) addresses associated with them. In simple terms, it is a tool that can …
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question