Diff: iLoIpmiComparison
Differences between version 11 and predecessor to the previous major change of iLoIpmiComparison.
Other diffs: Previous Revision, Previous Author
| Newer page: | version 11 | Last edited on February 23, 2012 5:54 pm | by PhilHollenback | Revert |
| Older page: | version 10 | Last edited on January 28, 2009 1:48 pm | by PhilHollenback | Revert |
@@ -1,202 +1 @@
-!!!iLO vs. IPMI
-!Remote Server Management
-! Phil Hollenback, www.hollenback.net
-
-!!Intro
-
-* *IPMI*: _Intelligent Platform Management Interface_
- * Standard interface developed by Intel
- * Supported on servers from many vendors
- * This support is often in the form of a separate card attached to motherboard
- * Add-on at time of system purchase
- * Current Version is 2.0, which differs significantly from old (and installed everywhere) v1.5
-
-* *iLO*: _Integrated Lights Out_
- * Developed by Compaq many years ago, then enhanced by HP
- * Standard on all 200- and 300- series Proliant Servers
- * Current version is 1.89
-
-* Both
- * Separate management processor inside the system
- * As long as system is connected to power this management processor is alive
- * In IPMI this is called the _Baseboard Management Controller_ or BMC
- * Allow remote access when system is turned off or crashed
-
-!!Setup
-
-* *iLO*
- * BIOS for basics of net connectivity and access
- * Web Interface for everything else
- * Requires Java on the client
-
-* *IPMI*: varies by vendor.
- * Typically basic setup performed in BIOS similar to iLO
- * network
- * admin user / password
- * Further config via IPMI interface on local machine or on the net
- * In linux all access is via
[IPMITool|http://ipmitool.sourceforge.net
]
-
-!!Security
-
-* Users
- * *iLO*
- * users can be managed in bios
- * users can be managed in web interface (iLO has built-in web server)
- * Can authenticate users via your LDAP server.
- * *IPMI*
- * Admin user can be configured in bios
- * Use =ipmitool= to add/manage additional users (if needed)
- * No built-in web browser
- * Some vendors (~SuperMicro) have added their own proprietary web interfaces
-
-* Encryption
- * *iLO*
- * Web interface is via https
- * SSH is enabled by default and user keys can be stored in the iLO.
- * *IPMI*
- * No encryption in v1.5 (big installed base of servers)
- * SSL, etc. in v2.0
-
-!!Network Model
-
-* Old iLO requires separate physical network port on system
-* IPMI and new iLO share primary ethernet with first ethernet port
- * Only first ethernet port
- * Can be a problem if your network driver swaps the port order
-* Both have a separate MAC and IP address on shared port setup
-* IPMI v2.0 and recent iLO support vlans
- * Segregate server management traffic
-
-!!Server Power Control
-
-Management controller can change power state of system
-* hard power down (remove power to system)
-* soft reset (simulate overtemp in ACPI to force system to do an OS shutdown (iLO only)
-* hard reset (interrupt power to system)
-* power on
-
-Both examples performed from another system with network connectivity to test machine:
-
-!iLO
-<verbatim>
-$ ssh server-ilo-address
-... enter password...
-</>hpiLO-> power
-power: server power is currently: On
-
-</>hpiLO-> power warm
-... warm reboot of system...
-</verbatim>
-
-!IPMI
-<verbatim>
-$ ipmitool -I lan -H server-ipmi-address -U admin -a chassis power soft
-</verbatim>
-
-* You can flash the system status led too
- * So you can direct someone to find a machine in a rack of similar systems
-
-!!Remote Console
-
-* *iLO*: Ready out of the box
- * ssh to iLO address and run command =remcons=
- * or use java app in web interface
-* You get the exact system console (text only), including bios
- * Have to configure OS to use text console also
- * In Linux add <code>console=ttyS1,115200n8 console=tty0</code>
-
-* *IPMI*
- * Not official part of v1.5 standard
- * _Serial Over Lan_ is supposed to redirect serial console to a proxy server
- * Proxy server has to be running on a different system
- * [Dell proxy server for Linux|http://lists.us.dell.com/pipermail/linux-poweredge/2005-December/023974.html]
- * Then you can telnet to port 623 of that system and it translates the console display from IPMI on other server
- * Upgly hack and I've never seen it work!
- * Supposedly v2.0 defines a standard console
- * Vendors such as ~SuperMicro use java and a web server similar to iLO, but not standardized either
-
-!! Sensors
-
-* *iLO*
- * Can't see current fan, cpu readings
- * Will alert over snmp or in event log if values go out of spec
- * Will auto-shutdown on thermal failure
-
-* *IPMI*
- * Direct Access to sensors:
-<verbatim>
-$ ipmitool -I lan -H server-ipmi-address -U admin sensor get "Ambient Temp"
-Password: ...enter bmc admin user password...
- Sensor ID : Ambient Temp (0x8)
- Entity ID : 7.1
- Sensor Type (Analog) : Temperature
- Sensor Reading : 21 (+/- -124) degrees C
- Status : ok
- Lower Non-Recoverable : na
- Lower Critical : 3.000
- Lower Non-Critical : 8.000
- Upper Non-Critical : 42.000
- Upper Critical : 47.000
- Upper Non-Recoverable : na
-</verbatim>
-
-!!Other Alternatives
-
-! Serial Console Server
-
-* Very reliable
-* Lots of extra cabling
-* Additonal hardware (console server) required
-* Serial port settings are fiddly
-* But very powerful with [conserver|http://www.conserver.com]
-
-! VNC / Remote Desktop
-
-* Only works at OS level
-* Gives graphical interface
-* Lots of network traffic
-
-!!Conclusion
-
-* IPMI is the way of the future
-* iLO is being replaced by more powerful iLO 2 (which also uses IPMI) on new servers
-* Server systems will probably all converge on IPMI 3 or something.
-
-!! Further Reading
-
-* iLO at HP: http://h18000.www1.hp.com/products/servers/management/ilo/index.html
-* IPMI Spec: http://developer.intel.com/design/servers/ipmi/
-* IPMITool for Linux: http://ipmitool.sourceforge.net
-* Conserver: http://www.conserver.com
-* Dell proxy server for Linux: http://lists.us.dell.com/pipermail/linux-poweredge/2005-December/023974.html
-* Managing Dell Servers with IPMI: http://www.dell.com/downloads/global/power/ps4q04-20040204-Murphy.pdf
-* Optimizing Console Redirection: http://www.dell.com/downloads/global/power/ps4q05-20040205-Hoke-OE.pdf
-* This Page: http://www.hollenback.net/index.php/iLoIpmiComparison
-
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+Describe
[iLoIpmiComparison
] here
.
version 11
Describe iLoIpmiComparison here.
