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VOSS - VLACP blocks port immediately after 'no shutdown'

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TitleVOSS - VLACP blocks port immediately after 'no shutdown'
Symptoms
  • After enabling port 1/1, on VSP side, there is no traffic passing through.
  • 'show alarm database' and 'show vlacp interface' inform that port 1/1 is blocked by VLACP:
    #show alarm database
    
    CP1  04f00001.192 0x000ec5ce DYNAMIC SET  WARNING  trapSendVlacpLinkDown: Vlacp Link 1/1 is down
    
    #show vlacp interface
    ====================================================================================================
                                   VLACP Information
    ====================================================================================================
    INDEX ADMIN   OPER    PORT   FAST    SLOW    TIMEOUT TIMEOUT ETHER      MAC       
          ENABLED ENABLED STATE  TIME    TIME    TIME    SCALE   TYPE       ADDR       
    ----------------------------------------------------------------------------------------------------
    1/1    true   true     DOWN  200     30000    long     3      0x8103    01:80:c2:00:11:00

     
Environment
  • VSP 4000/7200/7400/8000
  • VOSS all supported software versions 
Cause
An issue was caused by a faulty I/O card on the remote device. 
Resolution
Replace faulty hardware on a remote device.
Additional notes
VSP port was directly connected to interface x/x  of ERS8600. While investigating ERS side, below logs were reported by device: 
 
CPU5 SNMP INFO Link Up(x/x)
CPU5 SNMP INFO Port x/x is a trunk port of mlt-x
CPU5 SNMP INFO Vlacp link up(x/x)
COP-SW INFO Slot X: F2E LCD phase 2 reset, lane 0.  Queue 4 stalled (code 7)
COP-SW INFO Slot X: F2E LCD phase 2 reset, lane 0.  Queue 0 stalled (code 7)
SW INFO Slot X: msgControl: messages starting with 'F2E ' suppressed
The previous message repeated 3 time(s).
CPU5 SNMP INFO Vlacp link down(x/x)
For more information, please refer to the article:
https://gtacknowledge.extremenetworks.com/articles/Solution/ERS-8600-8800-F2E-ASICs-Egress-Queue-Stuck-Causing-Traffic-Loss-and-Connectivity-Issue-1527861844942
 

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