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Fibre Channel (SAN)

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Occasional Contributor
Posts: 7
Registered: ‎09-26-2018

fabriclog output

Hi to all

 

We are currently encountering disconnections fromt our VM host to VNX storage. Upon checking fabriclogs on dcx 8510 Director switch,

we are recieving the following logs

 

06:52:52.599972 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:52:56.599866 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:53:00.599674 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:53:04.599934 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:55:45.600322 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:55:49.601108 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA

 

Please enlighten me what is the meaning of the fabric log above.

 

Below is the SFP show for index 92 which is slot 10 port 12

 

=============
Identifier: 3 SFP
Connector: 7 LC
Transceiver: 700c406000000000 4,8,16_Gbps M5,M6 sw Inter,Short_dist
Encoding: 6 64B66B
Baud Rate: 140 (units 100 megabaud)
Length 9u: 0 (units km)
Length 9u: 0 (units 100 meters)
Length 50u (OM2): 4 (units 10 meters)
Length 50u (OM3): 0 (units 10 meters)
Length 62.5u:2 (units 10 meters)
Length Cu: 0 (units 1 meter)
Vendor Name: BROCADE
Vendor OUI: 00:05:1e
Vendor PN: 57-0000088-01
Vendor Rev: A
Wavelength: 850 (units nm)
Options: 003a Loss_of_Sig,Tx_Fault,Tx_Disable
BR Max: 0
BR Min: 0
Serial No: HAA215131001NG5
Date Code: 150327
DD Type: 0x68
Enh Options: 0xfa
Status/Ctrl: 0x82
Pwr On Time: 3.00 years (26313 hours)
E-Wrap Control: 0
O-Wrap Control: 0
Alarm flags[0,1] = 0x0, 0x40
Warn Flags[0,1] = 0x0, 0x40
Alarm Warn
low high low high
Temperature: 52 Centigrade -5 85 0 75
Current: 7.310 mAmps 2.500 12.000 2.000 11.500
Voltage: 3309.6 mVolts 3000.0 3600.0 3130.0 3460.0
RX Power: -4.6 dBm (347.3uW) 31.6 uW 1258.9 uW 31.6 uW 794.0 uW
TX Power: -2.4 dBm (573.1 uW) 126.0 uW 1258.9 uW 251.0 uW 794.0 uW

 

and the portshow

 

portIndex: 92
portName: VNX5800_VM_SPB3
portHealth: HEALTHY

Authentication: None
portDisableReason: None
portCFlags: 0x1
portFlags: 0x20b03 PRESENT ACTIVE F_PORT G_PORT LOGICAL_ONLINE LOGIN NOELP ACCEPT
LocalSwcFlags: 0x0
portType: 24.0
portState: 1Online
Protocol: FC
portPhys: 6In_Sync portScn: 32F_Port
port generation number: 0
state transition count: 0

portId: 0b5c00
portIfId: 43a2080b
portWwn: 20:5c:50:eb:1a:72:4e:00
portWwn of device(s) connected:
50:06:01:6b:08:60:3a:12
Distance: normal
portSpeed: N8Gbps

FEC: Inactive
Credit Recovery: Inactive
Aoq: Inactive
FAA: Inactive
F_Trunk: Inactive
LE domain: 0
Peer beacon: Off
FC Fastwrite: OFF
Interrupts: 0 Link_failure: 0 Frjt: 0
Unknown: 0 Loss_of_sync: 0 Fbsy: 0
Lli: 625 Loss_of_sig: 0
Proc_rqrd: 4706 Protocol_err: 0
Timed_out: 0 Invalid_word: 0
Rx_flushed: 0 Invalid_crc: 0
Tx_unavail: 0 Delim_err: 0
Free_buffer: 0 Address_err: 0
Overrun: 0 Lr_in: 19
Suspended: 0 Lr_out: 284
Parity_err: 0 Ols_in: 0
2_parity_err: 0 Ols_out: 0
CMI_bus_err: 0

 

here also is the porterrshow

 

frames enc crc crc too too bad enc disc link loss loss frjt fbsy c3timeout pcs
tx rx in err g_eof shrt long eof out c3 fail sync sig tx rx err

92: 2.0g 3.3g 0 0 0 0 0 0 0 34.1k 0 0 0 0 0 34.0k 35 0

Highlighted
Regular Contributor
Posts: 157
Registered: ‎03-20-2018

Re: fabriclog output

It's really difficult to read the porterrshow. Are the two 34K counter c3 disc and c3timeout? If so, this could indicate a slow drain device, not necessarily the device attached to this port. I recommend a SAN Health report to start.

Occasional Contributor
Posts: 7
Registered: ‎09-26-2018

Re: fabriclog output

Yes ma'am / sir. it is the c3disc and c3timeout. i already uploaded san health with 5 minutes duration. still waiting for the output.BTW what do you mean not necessarily attached to this port? Is it possible that the cause is the server hba zoned to this port and not directly the storage(vnx) attached to this port? Thanks.

Frequent Contributor
Posts: 86
Registered: ‎05-26-2010

Re: fabriclog output

The fabriclog --show events of LR_OUT to port 92 are indicative of the SAN switch port 92 not

receiving a timely receipt of R_Rdy primitives from the host HBA.  The switch port, if deprived 

long enough of R-Rdy to replenish the port buffers will issue a link reset (LR_OUT) to

re-establish buffers.    I agree with earlier comments that you should be investigating the

host HBA and its applications which are driving the i/o. 

 

06:52:52.599972 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:52:56.599866 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:53:00.599674 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:53:04.599934 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:55:45.600322 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA
06:55:49.601108 SCN LR_PORT(0);g=0x0 LR_OUT D2,P0 D2,P0 92 NA

The comments and advise included are the author's and do not mirror the views and opinions of any company. Any comments, advise, statements or references are without warranty, liability or claims of expertise. You should seek the assistance of the professional entity for subject matter being pursued.

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