Question

Dual nics, 2 different networks

Asked by: Macky4546

For some reason i cant get this strait. I am currently working in a environment that had 2 networks. Network A being 192.168.2.x and network B being 192.168.6.x. Currently they are transferring files between both networks through a cisco 2514(10mbit max connection), so large transfers are taken forever. They have a webserver that is located currently on network A. People upload the files to the webserver then transfer from the webserver to the production(on network B) server. Doing that process takes for ever. The webserver has dual nics with only one in use. If i enable the other one and gave it a .6 ip and subnet 255.255.255.0 without an default gateway, would they talk and would there be any conflicts. Also would it even boosts the transfer time?

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Asked On
2007-11-02 at 15:30:01ID22936059
Tags

server

,

dual

,

different

,

nics

,

networks

Topics

Windows 2003 Server

,

Network Analysis Software

,

Network Design & Methodology

Participating Experts
3
Points
125
Comments
6

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Answers

 

by: aramirezomniPosted on 2007-11-02 at 15:37:46ID: 20204965

Your server could be on both networks that way but you wouldn't be able to route data through the server. So you can't use that server as a gateway between the networks. You could however create a file share on that server that both machines could connect to. You may even still be able to use an FQDN on both networks. If not you can definitely connect via IP

 

by: LauraEHunterMVPPosted on 2007-11-02 at 16:01:10ID: 20205044

> "but you wouldn't be able to route data through the server"

This is not the case if you configure the Routing & Remote Access (RRAS) service on the server, which allows a 2003 server to perform software-based routing as described here: http://www.windowsnetworking.com/articles_tutorials/Configuring-Windows-Server-2003-act-NAT-router.html

NB - if this server is a domain controller in an Active Directory network (it doesn't sound that way from your description but you haven't specified), running in a dual-homed configuration is not recommended.

 

by: LilshooterPosted on 2007-11-02 at 16:02:06ID: 20205049

Your biggest problem is the switch running at 10mbit.  If your server nics support "teaming" you could bind the two nics together to create a faster pipe, however your switch is still going to be working at 10mbit.  With more information about your network there might be other options that can be explored.  Are both the webserver and production server located in the same place?  Are there dual nics on both machines?  An option might be to connect the two machines with a crossover cable, depending on the speed of the nics you could get 100mbit speeds or even more if they are gigabit.  Another thing to look at would be the configuration of the Cisco switch, make sure that the ports are set to FULL DUPLEX instead of HALF.  At the same time, make sure that your network cards are set to FULL DUPLEX as some cards might not auto-negotiate at FULL DUPLEX.

My recommendation would be to replace the switch with new technology, 10mbit has been out for SO long that it might be time to ask for a replacement.

Cheers,

Shoota

 

by: Macky4546Posted on 2007-11-02 at 16:34:54ID: 20205179

 

by: Macky4546Posted on 2007-11-02 at 16:37:42ID: 20205194

Both machines have dual nics. The router is configured the correct way with full duplex.

 

by: LilshooterPosted on 2007-11-02 at 16:53:36ID: 20205252

After looking at the picture you provided, if the switches you have showing there are managed and running at faster then the 10mbit router, I'd create a VLAN on each of the switches to a specified port let's say VLAN 32, then connect the unused nic from each server to the VLAN configured switchport, you can then specify another 192.168.X.X network to only work on the two nics  like 192.168.32.1 and 192.168.32.2 with no default route.  You can use a 255.255.255.252 that will limit your network on these nics to just the two machines .1 and .2

This making sense?

Shoota

20120131-EE-VQP-002

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