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Cisco Bug: CSCvi10935 - Sup2T/6T- CTS enabled interface goes down intermittently with trace backs- 15.3(1)SY2

Last Modified

Nov 15, 2019

Products (1)

  • Cisco Catalyst 6000 Series Switches

Known Affected Releases


Description (partial)

Sup2T/6T VSS running 15.3(1)SY2 -
CTS enabled interface goes down intermittently with trace backs. 

At this time we are not sure if the issue may not be specific to any software release/branch.
Please check with TAC unless the defect is fixed.

*Feb 21 21:36:55.833: %CTS-SW1-3-CTS_ERR: ../VIEW_ROOT/cisco.comp/cts/ctscore/src/cts_dp_api.c:348:cts_dp_l2_sadt_create(): CTS-DP err: cts_dp_l2_sadt_create: failed HW  RX  TX programming for Fo2/3/10[0] -Process= "CTS CORE", ipl= 0, pid= 69
-Traceback= 3B5F3AFz 3B531E6z 3B4F15Bz 3B550CCz 39AB69Cz 39AD18Ez

Feb 21 21:36:55.945: %LINK-SW1-5-CHANGED: Interface FortyGigabitEthernet2/3/10, changed state to administratively down
*Feb 21 21:36:55.945: %LINK-SW1-3-UPDOWN: Interface Vlan1962, changed state to down
*Feb 21 21:36:55.945: %DUAL-SW1-5-NBRCHANGE: EIGRP-IPv4 1500: Neighbor (Vlan1962) is down: interface down
*Feb 21 21:36:56.045: %LINEPROTO-SW1-5-UPDOWN: Line protocol on Interface FortyGigabitEthernet2/3/10, changed state to down

We have seen the issue with following scenario but it may not necessarily be limited to this. 

VSS with CTS enabled on 40G uplinks.
VSL control link is established on line card in the VSS. 
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