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New Member

2950 to 2950

I have a 2950 that connects fine to an old d-link.  Now,  however, we're puttingin a wlan and we're putting that on it's own vlan (the LAN only has 1 vlan). So, the d-link has to go as it doesn't recognize vlans (a really old switch).

I replaced the d-link with another 2950 and I set the connecting ports on both 2950's to switchport mode trunk.  I cannot get a connection.  When I do a show int or either switch it shows the port down (no shut command doesn't work either).

Can anybody explain what I missed?  Thanks.

  • LAN Switching and Routing
2 ACCEPTED SOLUTIONS

Accepted Solutions
Cisco Employee

Re: 2950 to 2950

You need to use crossover cable to connect the two switches. 2950 switches do not support Auto MDIX.

Re: 2950 to 2950

I have a 2950 that connects fine to an old d-link.  Now,  however, we're puttingin a wlan and we're putting that on it's own vlan (the LAN only has 1 vlan). So, the d-link has to go as it doesn't recognize vlans (a really old switch).

I replaced the d-link with another 2950 and I set the connecting ports on both 2950's to switchport mode trunk.  I cannot get a connection.  When I do a show int or either switch it shows the port down (no shut command doesn't work either).

Can anybody explain what I missed?  Thanks.

Hi,

As suggested check the cable as 2950 will not do auto cross if you connerct two switches together, they will require a cross over cable.Check the port configs on each switch. If one port is forced to trunk, and one set to switport mode access, the two will not link.


By default, the ports on a 2950 are set to auto, so if the switches have had no changes to any of the ports, the two should link with a properly connected crossover cable.

Hope to Help !!

Ganesh.H

Remember to rate the helpful post

4 REPLIES
Cisco Employee

Re: 2950 to 2950

You need to use crossover cable to connect the two switches. 2950 switches do not support Auto MDIX.

New Member

Re: 2950 to 2950

Hi,

  You should try on both switches to check if there is link, if there are cables misplaced.

sh int status

sh span int intf  

sh run intf         

sh vlan brief     

sh mac addr intf

sh int trunk

Re: 2950 to 2950

I have a 2950 that connects fine to an old d-link.  Now,  however, we're puttingin a wlan and we're putting that on it's own vlan (the LAN only has 1 vlan). So, the d-link has to go as it doesn't recognize vlans (a really old switch).

I replaced the d-link with another 2950 and I set the connecting ports on both 2950's to switchport mode trunk.  I cannot get a connection.  When I do a show int or either switch it shows the port down (no shut command doesn't work either).

Can anybody explain what I missed?  Thanks.

Hi,

As suggested check the cable as 2950 will not do auto cross if you connerct two switches together, they will require a cross over cable.Check the port configs on each switch. If one port is forced to trunk, and one set to switport mode access, the two will not link.


By default, the ports on a 2950 are set to auto, so if the switches have had no changes to any of the ports, the two should link with a properly connected crossover cable.

Hope to Help !!

Ganesh.H

Remember to rate the helpful post

New Member

Re: 2950 to 2950

(slapping forehead with hand).  Thanks.  It's been so long since I've run into that situation, it never even occurred to me that a Xover was necessary.  Worked fine.

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