Cisco MDS 9000 Series Configuration Manual page 167

Congestion Detection, Avoidance, and Isolation
The Duration of time not available column is the percentage of polling interval where Tx credits
were at zero and unavailable. In the command output, for the Event Time, Tue Aug 18 19:41:34
2018, the Duration of time not available is 10% and indicates 100 ms (10% of the polling interval
of 1 second is 100 ms). At Tue Aug 18 19:52:52 2018, the port-monitor policy was changed so that
the tx-credit-not-available counter's polling interval was 10 seconds and the rising-threshold was
20%. The Duration of time not available column shows 49% and indicates that almost 5 of the 10
seconds of Tx credits were at zero.
switch# show system internal snmp credit-not-available
Module: 1 Number of events logged: 20
-------------------------------------------------------------------------------------------
Port Threshold Rising Interval(s) Event Time
of time
/Falling
available
-------------------------------------------------------------------------------------------
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 10/0(%)
fc1/94 20/0(%)
fc1/94 20/0(%)
• Displaying of logging onboard error-stats—The show logging onboard error-stats command
displays the average Tx credit not available in 100-ms intervals that are indicated by the
FCP_SW_CNTR_TX_WT_AVG_B2B_ZERO counter. This counter increments by 1 for every 100
ms that an interface is in a continuous state of 0 Tx credits remaining. The increments are recorded
in the command output every 20 seconds. Information about other counters is also included in the
command output.
switch# show logging onboard error-stats
----------------------------
Module: 1
----------------------------
----------------------------
Show Clock
----------------------------
2018-08-28 12:28:15
---------------------------------
Module: 1 error-stats
---------------------------------
1 Tue Aug 18 19:41:34 2018
1 Tue Aug 18 19:42:14 2018
1 Tue Aug 18 19:42:15 2018
1 Tue Aug 18 19:42:55 2018
1 Tue Aug 18 19:42:56 2018
1 Tue Aug 18 19:44:34 2018
1 Tue Aug 18 19:44:35 2018
1 Tue Aug 18 19:48:50 2018
1 Tue Aug 18 19:48:51 2018
1 Tue Aug 18 19:49:31 2018
1 Tue Aug 18 19:49:32 2018
1 Tue Aug 18 19:51:42 2018
1 Tue Aug 18 19:51:43 2018
1 Tue Aug 18 19:52:51 2018
1 Tue Aug 18 19:52:52 2018
1 Tue Aug 18 19:53:14 2018
1 Tue Aug 18 19:53:15 2018
1 Tue Aug 18 19:58:36 2018
10 Tue Aug 18 20:20:02 2018
10 Tue Aug 18 20:21:45 2018
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
Information About Congestion Detection
Type Duration
not
Rising
Falling
Rising
Falling
Rising
Falling
Rising
Falling
Rising
Falling
Rising
Falling
Rising
Falling
Rising
Falling
Rising
Falling
Rising
Falling
10%
0%
10%
0%
10%
0%
10%
0%
20%
0%
20%
0%
10%
0%
10%
0%
20%
0%
49%
0%
149