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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

Nov 27, 2020

Products (1)

  • Cisco Catalyst 2960 Series Switches

Known Affected Releases

15.0(2)EX1 15.1(100.1)

Description (partial)

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

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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