Adding switch to existing router setting

19 Dec 2005 8:38 PM

goscottie

I'm adding a switch to an existing broadband router because I simply
ran out of ports on the router. Well, when I add the switch and
connect the new computer to the switch, it cannot get an ip (dhcp
enabled) through the router. Workaround I found was to connect the new
computer to the router first, obtain an ip, and then unplug it from
router and plug it back to switch. That works. I just don't know why
I have to do this. I don't want this to cause any problem renewing its
ip address days later. Is there a setting in router that I'm not aware
of?? TIA.

19 Dec 2005 9:04 PM

Lem

goscot***@gmail.com wrote:

> I'm adding a switch to an existing broadband router because I simply
> ran out of ports on the router. Well, when I add the switch and
> connect the new computer to the switch, it cannot get an ip (dhcp
> enabled) through the router. Workaround I found was to connect the new
> computer to the router first, obtain an ip, and then unplug it from
> router and plug it back to switch. That works. I just don't know why
> I have to do this. I don't want this to cause any problem renewing its
> ip address days later. Is there a setting in router that I'm not aware
> of?? TIA.

Brand/model of router?
Brand/model of switch?
Did you connect the router to the switch's uplink port (if it has one)?
Did you use a crossover or straight-thru cable to connect the switch and
router?
If the switch has a switchable uplink port, di you set it to "uplink"?

--
p

19 Dec 2005 10:01 PM

scottieyoon

Both Linksys, Router SPX200 (wireless), Switch (8 port, don't remember
the model, but I believe it's their very popular model).

Router doesn't have uplink, however, switch does, but I didn't use it.
So I connect one port from the router to one port in switch (not
uplink), straight-thru.

I believe uplink is to attach another switch or hub (says instruction
in switch manual). Well, I only have problem obtain an IP. I don't
have any problem surfing or connecting to other computers using above
settings so I believe I'm connected ok. Thanks a bunch for replying

19 Dec 2005 10:26 PM

Lem

scottiey***@yahoo.com wrote:

> Both Linksys, Router SPX200 (wireless), Switch (8 port, don't remember
> the model, but I believe it's their very popular model).
>
> Router doesn't have uplink, however, switch does, but I didn't use it.
> So I connect one port from the router to one port in switch (not
> uplink), straight-thru.
>
> I believe uplink is to attach another switch or hub (says instruction
> in switch manual). Well, I only have problem obtain an IP. I don't
> have any problem surfing or connecting to other computers using above
> settings so I believe I'm connected ok. Thanks a bunch for replying

Connect one of the router's ports to the uplink port on the switch:

http://tinyurl.com/73gmd

Question
Which ports should I use to hook a hub/switch to the router?
Answer
Connect a straight through CAT 5 Ethernet cable from a numbered port on
the router to the uplink port on the hub or switch. However most
Hubs/Switches uplink ports are shared with the port next to the uplink.
This means that you can not use the uplink port and the port next to the
uplink at the same time, you must use either or. If you are unsure if
your hub or switch as a shared up link port, please consult the
hub/switches documentation

19 Dec 2005 10:59 PM

scottieyoon

Ok, Will try that. Thanks again.

19 Dec 2005 10:01 PM

scottieyoon

I switch my login here and I think it's causing me to lose posting.
Let me try again.

I have both Linksys. Router is SRX200 (wireless) and switch is their
popular 8 port. Router doesn't have uplink but switch does. I connect
one port from router to one port in switch (not the uplink port), using
a straight-true.

According to the switch manual, uplink is for another set of switch so
I didn't use it. Keep in mind that I don't have connectivity issue
here, just problem obtaining an ip address using switch. Sorry for
posting several times. Thanks again.