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Cisco Bug: CSCuq87071 - shut/no shut on MDS 9148 E i/f connected via DWDM may not bring up port

Last Modified

Sep 09, 2019

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases


Description (partial)

MDS 9148 & DS-SFP-FC4G-SW SFP connected at 1 Gbit via Coriant Surpass hiT 7300 DWDM.
E port is continually shut and then 10 sec later "no shut" issued.
Occasionally, 1 in 20 attempts, a "no shut" will not bring the link up.

Multiple shut followed by "no shut" will show up this problem if connected to the DWDM equipment.

If MDS switches are connected back-to-back, shut/no shut works 100%
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