| Author |
No link lights when connecting 2 switches
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| techyrus1 2001-06-13, 2:23 pm |
| Does any one know the reason why i can't get both link light to go on when i connect my 2924xl switch and my 5500 switch because i am trying to do trunking? | |
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| are you using a crossover cable??? | |
| techyrus1 2001-06-14, 6:03 am |
| quote:
Originally posted by Mat P
are you using a crossover cable???
YES | |
| jane55 2001-06-14, 6:31 am |
| Have tried a know working crossover. Sometime those cables go bad. | |
| techyrus1 2001-06-14, 7:35 am |
| quote:
Originally posted by jane55
Have tried a know working crossover. Sometime those cables go bad.
I've tried so many different cables. | |
| TheBeave 2001-06-14, 8:43 am |
| techyrus1,
Make sure that the port on the 5500 is enabled.
example : set port enable 4/7 where "4" is the module number and "7" is the port number on that module. If the port is not enable, no link light will appear. Although not need for link, make sure that the speed and duplex on both devices match.
TheBeave | |
| acalligher 2001-06-14, 9:11 am |
| Do you have which type of connection?
RJ45 ? Fiber?
for RJ45 use a cross eth cable (pin 1-3, 2-6)
for fiber connect RX to TX!
Show the speed and duplex config on both switches
Bye
andrea | |
| strikeattack 2001-06-14, 10:21 am |
| I think the real question is why is he not getting a link light when connecting the two switches together? After you get the link light, then you should worry about trunking. Have you tried NO SHUT, SPEED 100, or DUPLEX FULL? <commands depending on the IOS version, of course>.
My only point is I would worry about trunking after you get the link lights... | |
| techyrus1 2001-06-14, 10:53 am |
| quote:
Originally posted by strikeattack
I think the real question is why is he not getting a link light when connecting the two switches together? After you get the link light, then you should worry about trunking. Have you tried NO SHUT, SPEED 100, or DUPLEX FULL? <commands depending on the IOS version, of course>.
My only point is I would worry about trunking after you get the link lights...
Your right, I cannot do trunking unless I got connection between the 2 switches.
I've tried different cables and also connecting other switches and still I get no link lights. I am attaching my configuration for both of my switches if anyone wants to take a look.
Thanks for everyone’s help. | |
| techyrus1 2001-06-14, 10:55 am |
| quote:
Originally posted by techyrus1
Your right, I cannot do trunking unless I got connection between the 2 switches.
I've tried different cables and also connecting other switches and still I get no link lights. I am attaching my configuration for both of my switches if anyone wants to take a look.
Thanks for everyone’s help.
here is the config for my 2924 xl en | |
| rjohn 2001-06-14, 11:34 am |
| make sure that there is no other crossover cable connected from 29xx to ur Core Swith 5000 to any other port
cuz otherwise the STP disable ur trunking port cuz there is already a connection between them both
Cheers | |
| strikeattack 2001-06-14, 1:02 pm |
| RJOHN,
Even if the port was put into blocking, you would still get a link light. | |
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| I still suspect the cable - On your 2924 connect two ports together with the cable, were looking for a link light on both ports.
The only thing to worry about on your config is that the ports aren't shutdown - anything else in your config is at a higher layer so will make no effect.
You could also use a hub to test your cable (again 2 ports on the hub) as the ports won't be shutdown so need to worry about the config if your not 100% happy. | |
| strikeattack 2001-06-14, 3:18 pm |
| Agreed. This will not be a hard problem to diagnose. Is there a chance that whomever made the cross-over cable screwed up? | |
| TheBeave 2001-06-14, 5:28 pm |
| Your 2924 looks good. I am not sure if you are using port 2/1 or 3/2 for your connection on the 5500. Try this. Configure another port that does not have trunking set on it (2/1 and 3/1-2 have trunking set on it). Make sure that the duplex and speed is full/100. Make sure that you enable the port. If you do a show port mod/port (example : show port 4/7), you should see if it is connect, notconnect, or disabled. 1)disabled - need the set port enable command 2)notconnect - possible cable problem 3) connect - connection is good. LED problem. Also only one of your ports on the 2924 is set for full/100. Make sure that the two ports on each switch cn communicate with each other before trunking.
Let me know if this helped
TheBeave | |
| strikeattack 2001-06-14, 6:40 pm |
| Good point Beave. You will want to rule out an LED problem by looking at your port status's logical configuration... | |
| techyrus1 2001-06-15, 7:09 am |
| quote:
Originally posted by TheBeave
Your 2924 looks good. I am not sure if you are using port 2/1 or 3/2 for your connection on the 5500. Try this. Configure another port that does not have trunking set on it (2/1 and 3/1-2 have trunking set on it). Make sure that the duplex and speed is full/100. Make sure that you enable the port. If you do a show port mod/port (example : show port 4/7), you should see if it is connect, notconnect, or disabled. 1)disabled - need the set port enable command 2)notconnect - possible cable problem 3) connect - connection is good. LED problem. Also only one of your ports on the 2924 is set for full/100. Make sure that the two ports on each switch cn communicate with each other before trunking.
The port on the 5500 thats connected to the 2924 is 2/1 and on the 2924 to the 5500 is fa 0/24.The cables work because i tested on another PC on the network and its good.also i tested the port on both switches and their good.I did a show port command and its says notconnected and duplex and speed is full/100.On those ports i connected the router and it shows Trunking but on the same port i connected the 2924 and no trunking.
Let me know if this helped
TheBeave
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| TheBeave 2001-06-15, 8:19 am |
| techyrus1,
Looking at your configuration on the 2924, you do not have port 0/24 set up for trunking. If the 5000 is set for it and the 2924 is not, I do not believe that we will get connection. Here are the command to set up trunking on the 2924.
conf t
int f 0/24
switchport mode trunk (configure for trunking)
switchport trunk encapsulation isl
By default, all vlans crosses the trunk
A show int f 0/24 switchport command will let you know if it is set up correctly.
TheBeave | |
| phatshaggi 2001-06-15, 9:06 am |
| i looked at the 2924 config file and the only thing may be the speed and/or duplex settings on your ports (except port 24)
could i see the 5000 config? | |
| techyrus1 2001-06-15, 9:33 am |
| quote:
Originally posted by phatshaggi
i looked at the 2924 config file and the only thing may be the speed and/or duplex settings on your ports (except port 24)
could i see the 5000 config?
Here is the 5500 config.Even before i started configuring the switches i still did not get a link light when they were both connected so i can't do any thing unless i get connection between the 2 switches. | |
| phatshaggi 2001-06-15, 10:57 am |
| try plugging in something else beside the 5000 switch, do you get connectivity? | |
| techyrus1 2001-06-15, 11:08 am |
| quote:
Originally posted by phatshaggi
try plugging in something else beside the 5000 switch, do you get connectivity?
Ive tried to plug in the server on the 5500 and the link light goes on but when i connected 2 of my 2924 and the 1900 it did not. | |
| jane55 2001-06-15, 11:59 am |
| Maybe you have a bad port.
Once our branch office lost connection to corporate and and I troubleshoot till I was blue before I found that 4J-45 switch port was bad. | |
| techyrus1 2001-06-15, 12:17 pm |
| quote:
Originally posted by jane55
Maybe you have a bad port.
Once our branch office lost connection to corporate and and I troubleshoot till I was blue before I found that 4J-45 switch port was bad.
I've tried also to trunk the 2 2924 switches and no link lights and other ports. | |
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| quote:
Originally posted by techyrus1
Ive tried to plug in the server on the 5500 and the link light goes on but when i connected 2 of my 2924 and the 1900 it did not.
Were you using the same cable????
If so then that's your problem - It's a straight cable for servers, PC's etc......
It's gotta be a crossover. | |
| techyrus1 2001-06-15, 1:23 pm |
| quote:
Originally posted by Mat P
Were you using the same cable????
If so then that's your problem - It's a straight cable for servers, PC's etc......
It's gotta be a crossover.
I am using a crossover cable from the 2924 to the 5500. | |
| TheBeave 2001-06-18, 7:11 am |
| techyrus1,
Have you disabled trunking on port 2/1 of the 5500 and seen if it will connect then. Also, have you tried my earlier suggestion. Let me know.
TheBeave |
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