Connection drops between 4500 and 6500 switch

Unanswered Question

Hello, I hope someone can help with this. we have 2 buidings that were recently connected by lasers. The lasers are connected to thier respective switches in each bulding. Building 1's laser is connected to a 6509 switch running catos software Version NmpSW: 6.4(21) Through gbics. Building 2's Laser is connected to a 4505 switch running software IOS Version 12.2(25) gbics. Since these buildings were connected we have been experiencing intermittent drops in connection 2-3 times an hour. Both switch ports are enabled Full-duplex. During a show tech these errors are reported:

CrcAlign-Err 294

Symbol-Err 7275310

Undersize 4054

Jabbers 18

Sequence-Err 6008107

The 6509 switch shows FCS-Err 81

I have been told that this is a fiber problem. Could it also be that the 6509 catos needs to be updated?

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Edison Ortiz Mon, 02/11/2008 - 11:10
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You can upgrade the OS version on the 6509 and see if it fixes the problem or better yet, during a maintenance window get another switch (if you have any spare) and replace the 6509 end for an hour.

However, I do believe it's a fiber problem.



glen.grant Mon, 02/11/2008 - 13:05
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Its either a fiber or a gbic problem with a weak laser .

fortis123 Tue, 02/12/2008 - 13:08
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I had the same kind of issue before with the similar errors.. Its physical issue. Replace to GBIC (as long as inhouse fiber is good).

It will fix it.




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