Apple 10.6 About Simple Network Management Protocol Snmp, Configuring Common Core Dump Options

Configuring Common Core Dump Options

By default, core dumps happen using UDP port 1069 over the built-in Ethernet (en0) interface, and the resulting files are stored in /PanicDumps on the core dump server. However, you can configure the core dump to use:

ÂÂ An alternate UDP port

ÂÂ An alternate network interface

ÂÂ An alternate file destination ÂÂ A specific network router

Changing any of these options requires that you restart the computers to reload the new settings. All settings assume the core dump client and the core dump server are using Mac OS X v10.5 or later.

Option	Action
To set an alternate UDP port...	On the core dump server, change the SockServiceName string
	property from 1069 to the desired port in /System/Library/
	LaunchDaemon/com.apple.kdump.plist.
	On the core dump client, add the _panicd_port flag to the
	NVRAM boot-args. For example, to change it to UDP port 12345,
	add “_panicd_port=12345” to the list of boot-argsflags.
To set an alternate network	On the core dump client, add the kdp_match_name flag to the
interface...	NVRAM boot-args. For example, to change it to always use en1,
	add “kdp_match_name=en1” to the list of boot-argsflags after
	the _panicd_ip flag.
	AirPort interfaces cannot be used to transmit core dumps.
To set an alternate file	On the core dump server, change the expected directory location
destination...	in the /System/Library/LaunchDaemons/com.apple.kdumpd.plist
	file, ProgramArguments string, then reload the kdumpd process.
To specify a network router...	On the core dump client, add the _router_ip flag to the
	NVRAM boot-args. For example, to change it to use the router
	10.0.0.1, add “_router_ip=10.0.0.1” to the list of boot-argsflags
	after the _panicd_ip flag.

To change the location of the core dump directory, change the expected directory location in the com.apple.kdumpd.plist file, then reload the process.

About Simple Network Management Protocol (SNMP)

SNMP is a common protocol for monitoring the status of network equipment (for example, routers and smart switches), computers, and other networkable devices like Uninterruptable Power Supplies. Mac OS X Server uses Net-SNMP to implement SNMP v1, SNMP v2c, and SNMP v3 using IPv4 and IPv6.

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Chapter 8    Monitoring Your System