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Cisco Bug: CSCvu27335 - NC55-6X200-DWDM-S :Complete traffic drop on macsec enabled link one node <= 6.5.x and other >=6.6.x

Last Modified

Sep 02, 2020

Products (12)

  • Cisco Network Convergence System 5500 Series
  • Cisco Network Convergence System 55A2-MOD-HD-S
  • Cisco Network Convergence System 5504
  • Cisco Network Convergence System 5516
  • Cisco Network Convergence System 5502-SE
  • Cisco Network Convergence System 5502
  • Cisco Network Convergence System 55A1-24H
  • Cisco Network Convergence System 55A2-MOD-S
  • Cisco Network Convergence System 55A2-MOD-SE-S
  • Cisco Network Convergence System 5501-SE
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Known Affected Releases

6.6.2.BASE 6.6.3.BASE

Description (partial)

A bundle link with macsec enabled member ports on Coherent Cards between XR 6.5.x (or lower version) and XR 6.6.x (or above version) won’t come up. 

The physical ports will be up but the bundle won't come up and shows below error.

RP/0/RP0/CPU0:NCS-5508#sh bundle bundle-ether 1
Thu May 14 17:01:58.877 UTC

  Status:                                    Down
  Local links :   0 / 0 / 2
  Local bandwidth :     0 (0) kbps
  MAC address (source):                      0078.88f3.8c83 (Chassis pool)
  Inter-chassis link:                        No
  Minimum active links / bandwidth:          1 / 1 kbps
  Maximum active links:                      64
  Wait while timer:                          2000 ms
  Load balancing:
    Link order signaling:                    Not configured
    Hash type:                               Default
    Locality threshold:                      None
  LACP:                                      Operational
    Flap suppression timer:                  Off
    Cisco extensions:                        Disabled
    Non-revertive:                           Disabled
  mLACP:                                     Not configured
  IPv4 BFD:                                  Operational
    State:                                   Down
    Mode:                                    ietf
    Fast detect:                             Enabled
    Start timer:                             Off
    Neighbor-unconfigured timer:             Off
    Preferred min interval:                  100 ms
    Preferred multiple:                      5
    Destination address:           
  IPv6 BFD:                                  Not operational

  Port                  Device           State        Port ID         B/W, kbps
  --------------------  ---------------  -----------  --------------  ----------
  Hu0/1/0/0/0           Local            Configured   0x8000, 0x0002   100000000
      Link is Defaulted; LACPDUs are not being received from the partner
  Hu0/1/0/1/0           Local            Configured   0x8000, 0x0001   100000000
      Link is Defaulted; LACPDUs are not being received from the partner

This bug applies to bundle links satisfying the following conditions :

1. Member ports on Coherent card with MACSEC configured 
2. One end node on 6.5.x (or lower version) and other end node on 6.6.x (or above version).
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Bug Details Include

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  • Status
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  • Related Community Discussions
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