Daisy-chaining Catalyst 3560's

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Apr 27th, 2007
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I added a second switch to my network. Neither switch (or anything connected to them can see the other). The second switch also cannot connect to the internet. I tried a crossover cable, a patch able, and even got desperate and connected both. Am I missing a step here? Do I have to use particular ports. Thanks for any advice (Note: The IP scheme is valid. Both have the same sub-net, and Default Gateway).

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ankbhasi Fri, 04/27/2007 - 03:45
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Hi Friend,

Do you see a physical link as up when you connect 2 switches by cross cable? If yes then we need to check the port configuration on the ports by which these 2 switches are connected? So can you paste the port config for the 2 ports ?

Also can you issue a command "sh cdp nei" and confirm if one switch can see other switch?



jwbasiaga Fri, 04/27/2007 - 06:07
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Activity lights blinking on both sides with a crossover cable. Port configs on switch #2 are set to all auto. NOTE: Switch #1 was set up by consultants and do not currently have the password. Thusly, I don't know the config of switch. I would have assumed it was plain vanilla. Resetting switch #1 is the absolute last resort as I don't want to make a bad situation worse. Thanks again.

sachinraja Fri, 04/27/2007 - 06:23
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as ankur said, did u check the cdp and confirm if the layer 2 is fine ?? i hope that you are extending the access layer using an access port on the first switch to connect to the second, and not trunking !! right ?? if not, u gotta check the port connected to the second switch .... that will be of help...

do let us know.


jwbasiaga Fri, 04/27/2007 - 07:40
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Thanks to all. Got in touch with the consultants and the original switch was not set up plain vanilla. Multiple VLANS which were not the default. He telnet-ed in and changed the config on both switches and now we are one happy little network. Thanks again.

Joe - LAN Guy (not a WAN Guy)


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