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Cisco Bug: CSCuj74167 - Gigabit link from WS-C2960X not coming up when GLC-SX-MM GLC-LH-SM used

Last Modified

Sep 20, 2019

Products (1)

  • Cisco Catalyst 2960 Series Switches

Known Affected Releases

15.0(2)EX1 15.1(100.1)

Description (partial)

Symptom:
Link between Catalyst 2960X switch and another Cisco device not coming up.
While the interface status on C2960X shows up/up, remote-end device reports down/down.
No CDP neighbor, or STP state reported on the remote-end devices.

This issue is seen following devices at remote-end but not limited to:
Nexus 5000
Catalyst 6500/6800
Catalyst 4500 with links connected to ports in 4306 or 4448-GB modules

Conditions:
All types of Catalyst 2960X are affected and this defect is applicable only if the switch use GLC-SX-MM or GLC-LH-SM SFPs for the links in issue.
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Bug Details Include

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  • Status
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