I have two 2950 switches. I am trying to set up a trunk over fa0/1 on both switches. There are no lights on the ports when I connect a cross-over cable. Any suggestions would help. I used the following commands on my first switch (Texas):
You can't have one side forced on (switchport mode trunk) and the other side "switchport mode dynamic desirable . Just make both sides " switchport mode dynamic desirable" which is the default setting anyway on these switches . If its truly a Xover cable and the ports are administratively enabled then you should get a link light otherwise check or replace the cable. These switches do not have mdix so you must use a xover .
You can have "switchport mode trunk" on one side and "switchport mode dynamic desirable" on the other side and it will form a trunk because DTP will negotiate a trunk. If you look at the output of both interfaces and it says
John is correct about using "on" , though most cisco docs I have seen recomend using desirable - desirable on each end . I have seen problems where trunks are forced on and one end says its trunking and the trunk is not actually working .
yeah, i see the d/d config on a lot of cisco website configs as well.
where have you run into a problem? What type of switches? IOS? or CatOS? i'll lab it up and post the debugs.
i've been setting my 2950 trunks to "trunk" instead of desirable and havent had an issue. i know there used to be an issue (years ago) with doing trunk/trunk on older CatOS switches, but I haven't run into that in a long time.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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