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Webcast-Catalyst9k
New Member

LINEPROTO UP/DOWN in same Second

020221: Jul 23 07:52:23: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/2, changed state to down

020222: Jul 23 07:52:23: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/2, changed state to up

020223: Jul 23 07:52:24: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/2, changed state to down

020224: Jul 23 07:52:27: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/2, changed state to up

Any IDeas?

I see this every few half hours

6 REPLIES

Re: LINEPROTO UP/DOWN in same Second

check the device that connects to the port.

HTH>

New Member

Re: LINEPROTO UP/DOWN in same Second

Thanks. The other side is showing no LINEPROTODOWN at all!

Cisco Employee

Re: LINEPROTO UP/DOWN in same Second

Hello,

Is it a fiber or a copper port? Is it possible to test the connection using a proper testing equipment? Also, if you connect the link into a different port, does that port behave in the same way?

I also recommend checking the interface counters on both sides of the link to see if there are any transmission errors that would suggest a problem with the medium.

Best regards,

Peter

New Member

Re: LINEPROTO UP/DOWN in same Second

Hi!

Thanks!

Its fiber.

Actually i see not CRC Errors. Only Symbol errors every now and then. I will try to connect them to a different port.

Actually i had the same problems with another port i moved from 2/0/6 to 2/0/8

whis was fine and AFTER that the problems startet with the other 2 ports 2/0/1 2/0/2

:-(

Re: LINEPROTO UP/DOWN in same Second

You my have a cross fibre - try swapping over the connections

New Member

Re: LINEPROTO UP/DOWN in same Second

This means swapping the fibres?

Is this some kind of Cross Talk?

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