Cisco 7609 optical gigabit interface - strange problem

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

I have connect two ports of the switches and I brough up the interface. I got the following result if i tun '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

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

Thank you

BR \\Sergio

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Uzytkownik "sergio.lorusso" napisal w wiadomosci news:

I don't exactly understand your description.... port2 - port1, what does it mean ? you connect port 2 on switch A to port 1 on switch B ??

Beside this missunderstanding, i think that it's a stp...

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Hi Stavros I have connected with the same optical fiber cable and the same GBic these pair of port on the switches. For each pair of port i got that result.

BR \\Sergio

Stavros ha scritto:

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