Hit this bug on the 6880’s CSCuq46668

The official Cisco write up is here:
https://tools.cisco.com/bugsearch/bug/CSCuq46668/?reffering_site=dumpcr

The bug tool says it the know affected versions is 15.2(1)IC273.149  but I’m running Version 15.1(2)SY3.  I guess I’m running the wrong version of SY3 because this version 15.1(2)SY3.37 has the fix.

But this is what I was seeing that got me to talk with Cisco.  They originally said it was “cosmetic”.  But as you’ll see it’s not.

Nov 14 13:46:56.552: %SATMGR-SW2-5-FABRIC_PORT_UP: SDP up on interface Te2/5/5, connected to FEX 105, uplink 49
Nov 14 13:48:27.745: %SATMGR-SW2-5-FABRIC_PORT_DOWN: SDP down on interface Te2/5/6, connected to FEX 106, uplink 49 (reason: received non-vntagged packet)
Nov 14 13:48:35.285: %SATMGR-SW2-5-FABRIC_PORT_UP: SDP up on interface Te2/5/6, connected to FEX 106, uplink 49
Nov 14 13:50:53.990: %SATMGR-SW2-5-FABRIC_PORT_DOWN: SDP down on interface Te2/5/6, connected to FEX 106, uplink 49 (reason: received non-vntagged packet)
Nov 14 13:51:01.578: %SATMGR-SW2-5-FABRIC_PORT_UP: SDP up on interface Te2/5/6, connected to FEX 106, uplink 49
Nov 14 13:55:44.446: %SATMGR-SW2-5-FABRIC_PORT_DOWN: SDP down on interface Te2/5/6, connected to FEX 106, uplink 49 (reason: received non-vntagged packet)
Nov 14 13:55:51.991: %SATMGR-SW2-5-FABRIC_PORT_UP: SDP up on interface Te2/5/6, connected to FEX 106, uplink 49
Nov 14 14:03:27.677: %SATMGR-SW2-5-FABRIC_PORT_DOWN: SDP down on interface Te2/5/5, connected to FEX 105, uplink 49 (reason: received non-vntagged packet)

So the uplink is dropping because of a non-vntagged packet.  Since this is the 6800ia uplink everything on that link should be vntagged.  But since I have redundant uplinks it doesn’t drop off.

While trouble shooting this issue I also swapped SFP’s and I swapped ports on the 6800ia, and I swapped fiber.  Port 49 was always the uplink port that was reported in these logs.  So I thought it was a hardware problem.  But no it’s a bug.

They say it’s fixed in 15.1(2)SY4.  I’ll get it upgraded and post the results.

On a side note.  SDP stands for Satellite Discovery Protocol.  I’ll have to dig into that now.

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