The Issue

We implemented a new UCS-Mini for a customer with existing Nexus 5548UP (5.1(3)N1(1a)), on the SAN Part we faced some strange issues:

2017 Mar 25 12:11:30 NEX5548-2 %PORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: %$VSAN 300%$ Interface san-port-channel 200 is down (No operational members)
2017 Mar 25 12:11:31 NEX5548-2 Mar 25 12:11:31 %KERN-3-SYSTEM_MSG: fc2_nsh_tx_frame: FC2 s_id/d_id/vsan error: sid=0xfffffe,did=0x0,vsan=300,rctl:0x23,type:0x1,oxid 0x4d,rxid:0xff25 - kernel
2017 Mar 25 12:12:10 NEX5548-2 %PORT-5-IF_PORT_QUIESCE_FAILED: Interface fc1/20 port quiesce failed due to failure reason: Force Abort Due to Link Failure (NOS/LOS) (0x119)
2017 Mar 25 12:12:10 NEX5548-2 %PORT-5-IF_DOWN_OLS_RCVD: %$VSAN 300%$ Interface fc1/20 is down (OLS received) san-port-channel 200
2017 Mar 25 12:12:10 NEX5548-2 Mar 25 12:12:10 %KERN-3-SYSTEM_MSG: fc2_nsh_tx_frame: FC2 s_id/d_id/vsan error: sid=0xfffffe,did=0x0,vsan=300,rctl:0x23,type:0x1,oxid 0x5a,rxid:0xff32 - kernel

The san-port-channel was really basic and added to just one VSAN

interface san-port-channel 200
  channel mode active
  switchport mode F
  switchport trunk mode off

vsan 220 interfaces:
    san-port-channel 100 san-port-channel 200

There was also an existing UCS where the san-port-channel worked without any issue

san-port-channel 100 is up
    Hardware is Fibre Channel

Solution

After some looking around i found a bug that matched pretty good on the cisco page.
I checked the MAC OUI on the UCS Mini

UCS-Mini-A# connect nxos
.
.
UCS-Mini-A(nxos)# show int fc1/1
fc1/1 is down
    Hardware is Fibre Channel, SFP is short wave laser w/o OFC (SN)
    Port WWN is XX:XX:00:de:fb:XX:XX:XX

These matches the OUIs described in the bug

Add MAC OUI “002a6a”, “8c604f”, “00defb” for 5k/UCS-FI

After upgrading the Nexus 5548UP to 5.2.1.N1.9b i was finally able to bring the san-port-channel up between the Nexus and the UCS-Mini.

Software
  BIOS:      version 3.6.0
  loader:    version N/A
  kickstart: version 5.2(1)N1(9b)
  system:    version 5.2(1)N1(9b)

2017 Mar 26 07:52:12 NEX5548-2 %PORT-5-IF_UP: %$VSAN 300%$ Interface san-port-channel 200 is up in mode F