Post your router config without passwords and we can help.
You probably need to set the gateway on the router.
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Browse All TopicsI have recently go my hands on a Cisco 2900 Series XL (I believe its the 2924 to be exact). I'm just trying to set up a small network at my home for testing and learning purposes. I was wondering where the uplink goes on the swithc.
I connected the computers all to the switch and they're able to communicate, however when I connect the router to the switch, I don't have internet access and the link light is blank. I'm using straight through cables, as I am aware that crossover cables are for like devices only.
Can someone tell me what i have to do to get internet access goiing through the switch. I also have a 3com Hub that I used to use and the internet worked fine on that one. I've tried connecting the Router to the Hub then the Hub to the Switch with no success either.
(And I don't think that the switch is damaged because I have two of them and they both can't get internet access)
Thanks again.
Hauie
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Hauie,
what Jonesmail means is that you DO need a crossover cable to connect the router to the switch.
But, you might not need the crossover cable IF your switch has an uplink port. On some switches this port has a button next to it to switch it from crossover to straight-thru. Other switches have two connectors for the uplink port, one for crossover and one for straight-thru.
In either case, use the uplink port to connect the router to the switch, and try both the crossover and the straight-thru modes of the uplink port. One of them should work.
HTH
CajunBill
RDadams.... I was under the impression that the gateway on the router is the gateway from my ISP. All my computers are set to use the router as my gateway which is the standard 192.168.2.1 Please elaborate more on what you mean by set the gateway on the router. Thank you
I will try the cross-over cable. The only problem is that my router and modem are upstairs (second floor) of my house, and my server room is in my basement. So the cable would need to be long and would be a hassel to feed throughout my house. Can i get a short cross over and put the straight through to my hub and then the cross over from the hub to the switch.
On the Cisco2924 XL there is no clearly marked port for uplink. There is one port on the back for "console", which is pretty self explanatory. and then 24 ports on the front all numbered 1 to 24. Thats it.
Mikebernhardt.... My IP subnet for the router is on the same one as my PCs. Here is a simple diagram hope it helps
ISP ---> Modem --> SMC Router --> Switch ---> 5 PCs
| ___________________
| |
2 PCs These 5 pcs don't get internet connection this way but can communicate amongst themselves. , but if you replace the Cisco Switch with the 3com Hub Every Pc gets access to the internet and communicate amongst themselves.
When i connect the router to the switch i get no internet access on the 5 pcs, but the other 2 that are directly connected to the router still have access. I will try the Cross over, but do you guys think it will work if I connect it from the hub to the switch with the straight through going from the router to the hub or will i have to connect it directly from the router to the switch. Hope that wasnt' too confusing. Thanks for all your help, i really appreciate it.
Hauie
Hauie,
Yes you can "get a short cross over and put the straight through to my hub and then the cross over from the hub to the switch". You could even get just a connector (eg at Radio Shack) to connect the straight-thru to the crossover, so that the hub would not be in the picture. Or, if you have a phone line in the basement you could just move everything down there: modem, router, switch and PCs.
But make sure that the crossover cable you buy has all eight wires - some cheaper crossover cables only have two wires in them. That will not support higher network speeds.
CB
CajunBill
Thanks for the info, I will try the connector at radio shack, or i think its called the source now. As for moving the modem, its not a phone line its high speed cable internet and for the cable modem is upstairs. I'll try the crossover next week when I get more time. Thanks for all you help.
Just one final comment, i thought cross-overs for like devices ie. PC-to-PC, Switch-to-Switch, Hub-to-Hub. Isnt a hub or router different than a switch. I was under the impression a Hub was simply a repeater with multiple ports whereas a switch was a bridge with multiple ports, one being a layer one device and the other being a layer two device. Anyways, maybe i'm mistaken on the cross-over cable usage. Can some please correct me. Thanks again for all your help
Greetings,
Here's the bottom line. The number of variables in this situation is MUCH too high, and the ONLY way to arrive at a solid solution (WITHOUT guessing your way into mediocrity) is to forget about everything ethernet for a moment, and start focusing your attention on the 'console port' on the switch. I have extensive configuration experience with the 2924XL (and the MANY variants that all look the same, but provide drastically different feature-sets), so I will be able to help if you are willing to work logically and carefully by troubleshooting beginning at layer1 of the osi 7-layer model, and working our way all the way up to layer 7 (the IOS), configuring it so that we can get your Layer2 and 3 (2=Datalink +MAC layer & 3=Network (IP)) working the way it should be. You can get pulled 800 different ways with crossover this and that, but whoever said 'post your config' was on the right track.
STEP 1: Locate the console port on the switch. It's been far too long for my memory but there is an rs232 (serial) port somewhere on the 2924 chassis, you must locate it first. It is either a 9-pin DCE that looks like a PC serial port, or it is an RJ45 port which LOOKS like an ethernet port at a glance, but in fact will be labelled 'console' or something very similar to that. I'm 99% sure there is NOT a DB25 console port on the 2924 family.
SO, locate the 'console' port and then report back here and i will help you. It is imperative that you be able to log in to the router itself so that you can configure each port exactly as it should be. Depending on where you got it, there could very well be a configuration on the switch that is full of forced-speed and forced-duplex ports, buffer tuning, helper-addresses and a plethora of other options that will assure you NEVER get this working the way it should be. Resist the temptation to keep making a mess and trying every possiuble physical (layer 1 !) arrangement until it 'works'. The 2924 is a managed switch with an actual [internetwork] operating system on it, and must be configured from scratch.
In the event that the switch has a console password and an enable password that you do not know, we will need to be attached to the console port anyway to do a password recovery operation. It IS possible to do a password recovery on a 2924 but it's actually one of the trickier devices as there are multiple files in nvram, some of them very unique, perhaps even some prerequisite html if i remember correctly (even if ip http server is NOT enabled).
SO, locate the console port on the switch, report back here and i will step you through erasing the config, setting the config-register if necessary (we don't even know what boot state it's in yet), and so on. This is the most tedious part, the rest will go fast once you find the console port and have the appropriate cable. While you're at it, make a cable with cat5 that has the pinout of : 1,2,3,4,5,6,7,8 on one side, and then 8,7,6,5,4,3,2,1 on the other. This is called a 'roll cable'. you're going to need it if it's an RJ45, which i'm pretty sure it is.
Jayson
PS: I'd bet a month's pay that the reason the cisco switch will not link up with the SMC ethernet , is due to a forced speed or forced duplex on the cisco switch port being used (perhaps multiples). Simply having the correct cable is not going to be enough if there is a situation where the SMC and 2924 are unable to negotiate a mutually agreed-upon speed and duplex.
So, i reiterate, find the 'console' port on the switch, IF it's rj45 go ahead and make the cable i described, and then track down an rd45 to DB9 adapter. We can change the pinouts if necessary, i'll be able to deduce remotely which pin is which using process of elimination.
Hmmm......
That last poster says some good things, he obviously does know some things about Cisco boxes, but ...
Cisco recommends starting at layer one when debugging network problems.
And it is a lot easier to try out a crossover cable than to make a Cisco console cable ("rollover" cable), and get into the Cisco IOS software.
Before getting to the console/IOS, you would likely find it easier to try the suggestion first given by Joesmail (that is, crossover cable).
If it doesn't work in one port of the switch, try it in the other available ports, before trying the Cisco console port route.
But if the crossover does not work then the method from sonick808/Jayson is indeed the way to go, he does have a valid point that there may be a configuration on the switch that prevents it from working.
Of course, it is up to you, Hauie, to choose what to do.
CB
Well seeing that this is for test and learning purposes, I would like to go into the console of the switch to troubleshoot from there.
I will make the 'roll-over cable' on tuesday at work (I'm in Canada and its our thanksgiving so things are a little hectic with all the family here right now)
Sonick808, I did find the console port on the back and it is an RJ45 port. I guess I need a rollover cable before i can access the console, do i need to install any type of terminal software on the computer that I intend to use to access the switch??
does the rollover cable simply go from the switch into the nic card of my computer or do I need some type of Rj45 to DB-9 adapter.
Thanks again for all your help
Hauie
So, it sounds like your router has a built-in switch with 4 ports or something? In that case IP isn't the issue, I just wanted to get that out of the way.
The switch ports have link lights that are green when they are working. If they're orange then the ports are disabled in the configuration. If they're off then the switch doesn't think anything is connected, which means that it's probably a physical layer problem such as the crossover cable. There is no uplink ports, you just have 24 ports to use however you want.
If the light on the port you've chosen is off:
You will definitely need a crossover cable, but you can locate it anywhere in the path. HOWEVER if you use a hub in the path then you need 2 crossover cables- one from the router to the hub, the other from the hub to the switch. You can buy a RJ-45 coupler and plug a short crossover into the straight-through you currently have.
If it's orange or green but doesn't work:
As earlier stated, the 2924XL can be configured in a number of ways. The 2924 is capable of multiple vlans. If you don't know what a vlan is, it's a "virtual lan." Some ports can talk to some ports, and others can talk to others, but never the twain shall meet. It could also be that the ports are disabled in the configuration. In this case you will need to get onto the console port and fix it.
The console port is the RJ45 port located near the power outlet on the back. It should be running at 9600 baud. You will indeed need a "rolled" cable as Sonic808 said. The simplest thing will be to log into it, erase the config, reboot it, and leave it alone. The empty default configuration will work fine for you.
Mikebernhardt
There is no light that comes on when the straight through cable from the router is connected into the switch. I will be getting a cross over cable tomorrow along with a roll-over cable too. HOwever, you mentioned if I go through the hub i would need two cross over cables. Right Now as it stands, I can connect the Router to the hub using the straight thorugh cable and all computers connected to the hub can get internet access. I figured if I go from the hub to the switch now I would only need the one cross over cable.
And just to clarify, I can use Hyperterminal with just the roll-over cable going from the switches console port to my workstations NIC Card??
Thanks
Hauie,
Should have asked this earlier, your most recent posts triggered this thought:
A picture is worth a thousand words - let's draw a diagram.
Please let me know if the following diagram is correct:
Internet-----[DSL-or-cable
| |----computer2
|
|----computer3 (and so on)
That's the configuration that worked, is that correct?
The reason I have "Router" in quotes is that I'm guessing it is a DSL/Cable router.
Those of us trying to help you have been thinking that it was a Cisco router, but it isn't, and that makes a difference.
The ports on it are really SWITCH ports, NOT router ports! There is a difference.
Regards
CajunBill
CajunBill,
That diagram is pretty much how it is. The router is an SMC. The exact model I believe is "SMC7004" I'll check when i get home. IT is a wireless router. THe diagram you drew is exactly how it is set up except that there are two computers connected directly to the router. Those computers are not part of my test network. They have always worked and aren't really any concern. The reason I didn't think that the SMC router was switch ports was because the router isn't the greatest or most expensive router out there, in fact it is a pretty cheap one. In the 8th post of this thread, I drew a simple diagram that somewhat explains my setup here.
Thanks
Hauie
CajunBill,
Got my hands on a cross over cable today. I'm still looking for the crimping tools to make myself a rollover cable. I was told though that even with a rollover that I would need a rj45 to db-9 converter because I can't just connect the rj45 on the console port of the switch directly to the rj45 on my nic card, i have to actually connect the console port to the serial on the computer.
Thanks
Hauie
That's right, the console port goes to your serial port. And you need to set your com port to 9600 baud.
If the router is working with the hub, then you shouldn't need a crossover at all to get from the same port on the router to the switch. You do need a crossover between the hub and the switch of course.
So hauie, now that you have a crossover, you can easily try hooking "router" to hub to switch, to see if it works.
Just to enumerate the details, it is
"router", then straight-thru cable, connecting to the uplink port on the hub, then a crossover cable from any regular hub port to the switch.
You could easily do that before continuing on the effort to create a rollover cable and get the rj45 to db9 converter.
Just a thought.
CB
OKAY Everyone...
First off, thanks for all the help, After all that, The crossover cable did Work. And My internet connection is working through the switch now. So here is a summary of my network
ISP --> Modem ---> SMC Router --- (straight Through) --> Uplink port on HUB --- (Cross Over) ---> Cisco Switch ---> Computers 1-5
|
Sorry sent that by mistake,
Anyways... the 5 computers get internet access now. I am having problems with communicating between the computers now.. Some can communicate other can't but I think the problem lies in my Windows 2000 and 2003 server settings. I will experiment with that issue later, and i'm sure i'll have plenty of questions in the future, I'm still learning alot.
Sonic808 - I ordered a cisco RJ45 to DB-9 rollover cable and once i get that i'm gonna test out the console port. Try not to bug you unless I run into serious problems (which i'm sure I will) but i'm sure there is plenty in the Expert-exchange database that I can read first.
Thanks again for everyones help, I'm sorry that i can only split the points so many ways, i wish i could give you all 500 points. I will try to split them up accordingly.
I can see that i have a long way to go before I can even be considered in your guys league.
Thanks you
Hauie
Hauie,
It is possible that the reason the 5 computers cannot communicate with each other is possibly due to a left-over configuration on the Cisco switch. For example, if the 5 computers are plugged into the first 5 ports, and those ports are divided between two VLANs, then this could account for what you are seeing.
To find out if this is the case and to fix it you will need that console cable.
CB
CajunBill: You are 10000% correct, Layer1 is without a doubt the first place that network troubleshooting must begin. Even with the largest of production circuits, say for example a trans-atlantic OC-12 headed to Sussex; the first thing i'll do is call out a technician on either side of the link where the terminations first arrive, to do a "wiggle test" (TM) while watching/debugging the fiber interface/SONET/SDH/POS/et
Peace CajunB, peace Hauie.......
Jayson
sonick@sonick.com
Sonick,
Thanks for the input, The cross-over cable just solved the immediate problem, I still want to configure the network properly, thats why i ordered the cisco roll over cable. I'm sure once I get into the console, i'm not gonna know left from right or up from down, but I guess thats what makes it fun. The cable is just the beginning of what i imagine is a long long journey. Once again Thanks for your help (I'm sure that won't be the last time i'll be saying that) I think i'm gonna have to enroll in some of those online Cisco courses ( i think they're the CCNA courses). Are they worth it??
Hauie
Just a couple of comments:
1. If there were multiple vlans then the computers on the vlans other than what the router is plugged into still wouldn't have internet access. So that shouldn't be an issue.
2. Once you have console access and give the switch an IP address, you can manage it with http instead of the command line. You can also telnet to it. You only need the console cable at the beginning or if something breaks. But it's still a great investment.
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by: hauiePosted on 2005-10-07 at 14:09:11ID: 15042236
I forgot to mention that my router is just a plain and simple SMC.. nothing special but it gets the job done.
Thanks again