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.