Installation Guide

Table Of Contents
slot-number - disables power to the interface module in the specied slot. You can specify 1-4 for 4-slot routers, 1-8 for 8-
slot routers, 1-16 for 16-slot routers, and 1-32 for 32-slot routers.
NOTE
There is a 10 second delay between the power-o lp command and the power-on lp command. Wait 10 seconds between
commands.
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
rst occurrence of an I2C failure, the Global I2C Error Indicator (GIEI) ag severity is set to major. The GIEI ag is cleared only
when the management module is able to access the same physical device successfully. The GIEI severity ag 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 rst detected
When the GIEI severity is changed from major to minor
When the GIEI ag 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 rst Syslog message displayed is an Alert. The following example shows an Alert Syslog message
where the GIEI is set to major:
device# 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 MED-HI (90%)
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
ag
Severity of the failure: major or minor
MUX index number:
0-1 - there are total of 2 MUX indexes in ExtremeRouting XMR Series 32000 and ExtremeRouting MLX-32 devices.
The MUX index is always zero in 4-, 8-, and 16-slot XMR Series or MLX Series devices
Managing the device
Extreme Routing MLX Series Hardware Installation Guide
202 53-1004203-04