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STM1C issue on GSR (IOS 12.2(28)SB4)

Hi, I have GSR in my MPLS network. Previously, we run IOS 12.2(27)SBB but encountered STM1-C intermittent issue where some customers' circuits flapped terribly. We upgraded the IOS to 12.2(28)SB4. However, we face a new issue in which all circuits within the same E1 are monitored to be having high CRC and input errors. Just wondering if the problem is due to bugs or something else?

TQ

1 REPLY
Silver

Re: STM1C issue on GSR (IOS 12.2(28)SB4)

There may be a fiber loopback connected on both tunnel cards interfaces, which should not be connected. Disconnect the external loopback. After removed the external loopback the erors may drop on tunnel cards.

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