7 Managing the device
•all - enables power to all interface modules
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Monitoring I2C failures on management modules
The management module accesses temperature sensors, fan controllers, power supplies, serial PROMs, and other devices are all accessed through the I2C serial bus. When I2C devices are inaccessible, generic (and uninformative) error messages are displayed on the management module console interface. If you do not keep a record of the console messages before the management module resets or reloads, these error messages will be lost.
At the first occurrence of an I2C failure, the Global I2C Error Indicator (GIEI) flag severity is set to major. The GIEI flag is cleared only when the management module is able to access the same physical device successfully. The GIEI severity flag is set to minor only if other I2C devices are accessible. A set of static and dynamic Syslog messages are generated when any or all of the following events occur:
•When an I2C failure is first detected
•When the GIEI severity is changed from major to minor
•When the GIEI flag is cleared
These Syslog messages are generated in both the static and dynamic sections of the show logging command output. A Syslog message is also sent to the SNMP log server.
When the GIEI is set to major, the first Syslog message displayed is an Alert. The following example shows an Alert Syslog message where the GIEI is set to major:
Brocade# show logging
Sysloglogging: enabled (0 messages dropped, 0 flushes, 1 overruns)
Buffer logging: level ACDMEINW, 50 messages logged
level code: A=alert C=critical D=debugging M=emergency E=error I=informational N=notification W=warning
Static Log Buffer:
Apr 16 18:21:25:A:System: Power Supply 2 , middle, Not Installed (FAILED)
Apr 16 18:21:25:A:System: Power Supply 3 , top, Not Installed (FAILED)
Apr 16 18:21:25:A:System: bad i2c access (GIEI = set), Severity Major, Mux index 0, Muxtap 4, ID 0x4, Addr0x5, (FANTRAY4)
Apr 16 18:21:25:I:System: last good i2c access, Muxindex 0, Muxtap 1, ID 0x9, Addr0x1, (SNM1TEMP)
Dynamic Log Buffer (50 lines):
Apr 16 18:21:25:A:System: bad i2c access (GIEI = set), Severity Major, Mux index 0, Mux tap 4, ID 0x4, Addr 0x5, (FANTRAY4)
Apr 16 18:21:25:I:System: last good i2c access, Mux index 0, Mux tap 1, ID 0x9, Addr 0x1, (SNM1TEMP)
Mar 28 12:36:47:A:System: Set fan speed to MED (75%)
Mar 25 21:40:47:A:System: Set fan speed to
The Syslog message shows the last successful I2C access by the management module and also contains the following information about the failed device:
•Current state of the GIEI flag
•Severity of the failure: major or minor
322 | Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide |
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