11-11-2003
I've always been kinda fuzzy on the difference between the two myself, but here is my basic understanding of it. If anybody has better information or definitions of the two I'd be happy to be corrected . . . .
SAN is where the storage runs its own separate network, always (with maybe some rare exceptions?) over fiber. There are separate switches that connect the storage devices to each other, and you have host bus adapters in the servers that connect into those switches to access the storage.
NAS is basically just adding huge fileserver type boxes to the network. It may have direct connections to the servers or may just be accessed over the regular ethernet network.
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LEARN ABOUT CENTOS
rlm_ippool_tool
RLM_IPPOOL_TOOL(8) System Manager's Manual RLM_IPPOOL_TOOL(8)
NAME
rlm_ippool_tool - dump the contents of the FreeRadius ippool database files
SYNOPSIS
If an ipaddress is specified then that address is used to limit the actions or output.
rlm_ippool_tool [-a] [-c] [-o] [-v] session-db index-db [ipaddress]
Mark the entry nasIP/nasPort as having ipaddress
rlm_ippool_tool -n session-db index-db ipaddress nasIP nasPort
Update old format database to new.
rlm_ippool_tool -u session-db new-session-db
DESCRIPTION
rlm_ippool_tool dumps the contents of the FreeRADIUS ippool databases for analyses or for removal of active (stuck?) entries.
Or with the -n argument adds a usage entry to the FreeRADIUS ippool databases.
OPTIONS
-a Print all active entries.
-c Report number of active entries.
-r Remove active entries.
-v Verbose report of all entries.
-o Assume old database format (nas/port pair, not md5 output).
-n Mark the entry nasIP/nasPort as having ipaddress.
-u Update old format database to new.
EXAMPLES
Given the syntax in the FreeRadius radiusd.conf:
ippool myippool {
range-start = 192.0.2.0
range-stop = 192.0.2.255
[...]
session-db = ${raddbdir}/ip-pool.db
ip-index = ${raddbdir}/ip-index.db
}
To see the number of active entries in this pool, use:
$ rlm_ippool_tool -c ip-pool.db ip-index.db
13
To see all active entries in this pool, use:
$ rlm_ippool_tool -a ip-pool.db ip-index.db
192.0.2.5
192.0.2.82
192.0.2.244
192.0.2.57
192.0.2.120
192.0.2.27
[...]
To see all information about the active entries in the use, use:
$ rlm_ippool_tool -av ip-pool.db ip-index.db
NAS:172.16.1.1 port:0x2e8 - ipaddr:192.0.2.5 active:1 cli:0 num:1
NAS:172.16.1.1 port:0x17c - ipaddr:192.0.2.82 active:1 cli:0 num:1
NAS:172.16.1.1 port:0x106 - ipaddr:192.0.2.244 active:1 cli:0 num:1
NAS:172.16.1.1 port:0x157 - ipaddr:192.0.2.57 active:1 cli:0 num:1
NAS:172.16.1.1 port:0x2d8 - ipaddr:192.0.2.120 active:1 cli:0 num:1
NAS:172.16.1.1 port:0x162 - ipaddr:192.0.2.27 active:1 cli:0 num:1
[...]
To see only information of one entry, use:
$ rlm_ippool_tool -v ip-pool.db ip-index.db 192.0.2.1
NAS:172.16.1.1 port:0x90 - ipaddr:192.0.2.1 active:0 cli:0 num:0
To add an IP address usage entry, use:
$ rlm_ippool_tool -n ip-pool.db ip-index.db 192.0.0.1 172.16.1.1 0x90
rlm_ippool_tool: Allocating ip to nas/port: 172.16.1.1/144
rlm_ippool_tool: num: 1
rlm_ippool_tool: Allocated ip 192.0.2.1 to client on nas 172.16.1.1,port 144
SEE ALSO
radiusd(8)
AUTHORS
Currently part of the FreeRADIUS Project (http://www.freeradius.org) Originally by Edwin Groothuis, edwin@mavetju.org
(http://www.mavetju.org)
Mailing list details are at http://www.freeradius.org/
RLM_IPPOOL_TOOL(8)