Hey now...take a deep breath and pull back on the caps lock key a bit.
Everyone is just doing their best to help.
Good advice on starting from the simplest point. Back everything off to 10
meg half/duplex, turn portfast on, set everything on one vlan, and etc.
Then turn everything up...one thing at a time, from that point...if you even
need to. There is nothing wrong with doing full duplex over cat 5 cables (I
dunno where you get the two cable idea from for full-duplex connections but
I have to agree that someone saying a full duplex connection runs at 200Mb
has been working in marketing too long) but I usually use full-duplex only
between switches and routers, everything else I like to leave set for auto
(personal preference). Trunking (using more than one cable/nic between
devices) is a beautiful thing but you only need to use that if you want
redundancy or if the single ports are getting overloaded. Also, Cat5
cabling is good to 100 meters...not 10. Check most any networking white
paper for reference.
Anyway, to answer Mr. Tong's questions:
1) Hubs: It depends on which way you want to look at your speed question.
All ports on the hub have access to the 10Mb half-duplex backplane. So
every PC is contending for the 10 megs. I doubt you'd get about 6.5Mb out
of it anyway...after that it's primarily just a collision domain. But all
the machines together can't go beyond the 10Mb limit so in a way you could
say that each PC has the capability of pushing 10 megs but only if none of
the other machines are transmitting/receiving at that time.
2) The switch: Each user would have the capability of hitting 100Mb but if
you have a 100Mb backbone then no single user will really get that speed (in
fact, I'd intentionally leave the users at 10Mb half-duplex unless they
REALLY need the speed increase). However, if two PC's on the same switch
are talking to each other then they'll assumedly get the full amount of
speed without slowing down any other computers.
3) Speed and configuration issues: Feel free to post the interface stats so
we can see what is going on. Alternately just do what Stephen said and
start with the most basic config possible and go from there. Cisco's web
site has many sample configurations that may help you out.
Hope this helps....I've found that it's usually one minor little command
that got missed or set wrong. Once that is taken care of you just sit back
and watch the data fly by.
Daniel
-----Original Message-----
From: Stephen Skinner [mailto:[EMAIL PROTECTED]]
Sent: Monday, July 03, 2000 2:42 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: Slow Speed in 2900 Switches, Pls Help!!
JEES.....you have been given a load of crap advise......!!!!!!
FIRST lets start at the begininng .....you have 5 pc`s which are connected
to your switch .....they , i take it are 100 meg cards ...make sure they are
in HALF DUPLEX....(send and recieve on the same cable) NOT... FULL DUPLEX
(send and recieve on TWO different CABLES)
(THE WAY YOU GET 20/200 MEG IS YOU TRUNK (2 THATS 2) CABLES TOGETHER USING
TWO PORTS....... ANYONE TELLS YOU OTHER WISE IS A FOOL)in my experience you
should make sure the pc cards are set to this ...
SECOND...are you connecting to your main link at 100 meg.... if your using
cat 5 cabling and the main router is more than 10 meters away IR-REGARDLES
of what the switch says ...you wont be getting it...
THIRD...FORGET about spanning tree, trunking and all that crap ...START at
the beginning (I`M NO CCIE BUT I HAVE BEEN ROUND LONG ENOUGH TO KNOW THAT
YOU DON`T THROW THE CAR AWAY WHEN A CAM BELT GOES)
95% of your problems will be simple you just need to start at the
begining.......all the info you have been given is from PAPER CCNP/A`S
IF THEY KNEW WHAT THEY WERE TALKING ABOUT YOU WOULD HAVE IT FIXED BY
NOW!!!!!
mail me more if you want help
steve (IEEE,ITAU commite`s CCNP MCSE PSS ACE SSA Co-contributor to
Win200,RIP V2 CCSE JSE CLP )
>From: "Chee Tong Sim" <[EMAIL PROTECTED]>
>Reply-To: "Chee Tong Sim" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Slow Speed in 2900 Switches, Pls Help!!
>Date: Mon, 03 Jul 2000 05:51:36 GMT
>
>Dear friends,
>
>I have a few questions to ask:
>
>1) Our company Network are running at 100M speed. Now if I connect a 10M
>speed 3com hub to one of the ports in cisco 2900 switches (100M speed) in
>the company network, and I connect 5 pc to the 3com hub, so, the network
>speed of PC is 10M divided by 5= 2M each or 10M each?
>
>2) As the users complain about the speed, my boss asked me to use the brand
>new 2900 switch (100M speed) to replace the 3com hub. So I connect 2900
>switch to 2900 switch that in company network, and connect 5 Pcs to the
>2900
>switch, so the speed of PC should be 100M each or 100M devided by 5= 20M?
>
>3) But user still complain about the speed, I use the ftp function to check
>the speed and found the speed is only 150kb/sec= 0.15M only. I suspect
>because the switches that I used is a brand new switch, I havent configure
>VLAN and spanning tree protocol on the new switch to block to packet
>broadcase, so the speed is slow. If this is the case, can I consult you,
>how
>to configure VLAN and spanning tree on the new switches? Can anyone teach
>me? I ever seen the configuration file of a VLAN switches, but I don't know
>what command should I type to configure VLAN on 2900 switch. What is the
>procedures? Please help.
>
>Thanks in advance.
>
>Regards,
>Chee Tong
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