Apple Mac OS X Server (Version 10.6 Snow Leopard) - Manual (Page 180)

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:
An alternate UDP port Â
An alternate network interface Â
An alternate file destination Â
A specific network router Â
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-args flags.
To set an alternate network
interface... On the core dump client, add the kdp_match_name flag to the
NVRAM boot-args . For example, to change it to always use en1,
add “kdp_match_name=en1” to the list of boot-args flags after
the _panicd_ip flag.
AirPort interfaces cannot be used to transmit core dumps.
To set an alternate file
destination... On the core dump server, change the expected directory location
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-args flags
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.
180 Chapter 8 Monitoring Your System