Internetworking setup question

Misc / Misc
January 23, 2009 at 15:06:27
Specs: Windows XP, misc
Hi!

I have a networking setup query with the goal to minimise cost. I am hoping to purchase one item, be it a switch or router, and have all the rest remain the same. The end goal is to have a speedier network set up between a couple endpoint nodes. I'll describe the current state of the network and then where I'd like to be.

Current State:


Internet<-->to WRT54G-TM (DD-WRT SW)<-->Various as listed below


- Internet is addressable as aaa.bbb.ccc.ddd DHCP Assigned from ISP
- WRT54G-TM is a 10/100
- WRT54G-TM (DD-WRT SW) is static at [192.168.1.1]
- 1 printer connected to WRT54G-TM static IP of 192.168.1.10
- 3 PC connected to WRT54G-TM (DD-WRT SW) with dynamically assigned addresses starting at 192.168.1.100
- X# of Wireless devices connected to WRT54G-TM getting more dynamically assigned addresses starting at 192.168.1.100

I want to add some hardware to create a kind of segmentation for a gigabit switch/hub/router since I have a couple PC that are gigabit now and some that are not. I read online a few ways of configuring router to router connections. Additionally, I read a lot of info about switches operating at the speed of the slowest device on them. I'd like to segment it in a way to get the gigabits on a network where all devices are accessible to each other and at their optimal connection speeds.

What I am thinking is the following:

Internet<-->to WRT54G-TM (DD-WRT SW)<-->Gigabit router/switch<-->Two Gigabit capable PC
<-->Other Various As listed Below

- Internet is addressable as aaa.bbb.ccc.ddd DHCP Assigned from ISP
- WRT54G-TM is a 10/100
- WRT54G-TM (DD-WRT SW) is static at [192.168.1.1]
- 1 printer connected to WRT54G-TM static IP of 192.168.1.10
- X# of Wireless devices connected to WRT54G-TM getting more dynamically assigned addresses starting at 192.168.1.100

Changes:
- 1 PC of 100Mbps connected to WRT54G-TM (DD-WRT SW) with dynamically assigned addresses starting at 192.168.1.100
- Gigabit router (switch is better?) connected to WRT54G-TM (will this slow it down?)
- Gigabit router set to not assign DHCP addresses
- Gigabit router set to static ip such as 192.168.1.11 (after printer)

Theory is:
- PC A and PC B connected to Gigabit router will get an IP like 192.168.1.xxx from the WRT54G-TM
- This is good for allowing PC A and B to be seen and see others in that space

In this setup, if I am on PC A and make a connection to PC B will it run gigabit since they are each gigabit NIC and connected to a gigabit router or does the link to the WRT54G-TM slow it down? Also, as traffic passes from PC A to PC B will it all be sent up to the WRT54G-TM in order to find destination and causing it to run at the slower 10/100 speed? The speed hits are undesirable and even with the gigabit switch and WRT54G-TM switched there's still some connection of a slower switch into a fast switch that may slow stuff down. If this is not the proper way to achieve a fast data between the faster parts of my home network, may I have your recommendation on which parts I should procure in order to achieve that with a focus on cost sensitivity? Thank you for the help!


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#1
January 23, 2009 at 16:28:55
"In this setup, if I am on PC A and make a connection to PC B will it run gigabit since they are each gigabit NIC and connected to a gigabit router or does the link to the WRT54G-TM slow it down?"

Yes, the internet connection will only go as fast as the WRT. The communication between the A and B maybe faster but probably not enough to warrant the purchase of the gigabit switch or router.

In plain English, it's not worth it, save your money. Instead, I recommend TCPOptimizer from www.speedguide.net to increase speed. It's free. Run it on each machine. Read special instructions for Vista.


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#2
January 23, 2009 at 16:38:28
"switches operating at the speed of the slowest device on them"

This is not a true statement.

If that were true a 10/100/1000 switch would only operate at 10mb with an old pc connected when it has gig servers plugged in.

You have based all of your work on a false premise.


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#3
January 23, 2009 at 16:43:21
Thank you! That's great news.

Is the underlying premise that the PC A will go to the DD-WRT to find out where the PC B is and then interact with PC B only over the gigabit from then on? Or is it even better that the switch will handle the knowledge that PC B and PC A are all contained downstream from it?


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#4
January 23, 2009 at 18:09:39
Ideally you would replace your main router with one that supports gigabit on the lan. You plug everything into it and you will be fine

This way the gig pcs [not on wireless] would all talk gig and everything else would talk their own rate [54mbps for wireless]


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