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New Member

Cisco 7609 - optical gigabit interface

Hi all,

I have a strange problem with the optical gigabit interface of a Cisco

switch 7609. This is the problem:

I have two 7609 cisco switch (A and B) cross connect with a optical

fiber.

All port of both switches are configured as followed:

switchport

switchport mode acces

shutdown

no cdp enable

no ip address

end

With the same optical fiber cable i have connect two ports of the switches and I brough up the interface.

I got the following result if i run 'show ip interface brief' on the switches:

SW A - SW B

port 1 - port 1 --> link down protocol down

port 2 - port 1 --> link up protocol up

port 1 - port 2 --> link up protocol up

port 2 - port 2 --> link up protocol up

Why if i connect port 1 on both switches the link don't brought up?

Have anyone some idea for the possible cause of the problem?

Thank you

BR

\Sergio

1 REPLY
New Member

Re: Cisco 7609 - optical gigabit interface

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