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Sun Networking
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More reliable network connections through IP Multipathing
Posted: 12 Nov 03
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Solaris Multipathing enables a server to have multiple network ports connected to the same subnet. Solaris IPMP software provides resilience from network adapter failure by detecting the failure or repair of a network adapter and switching the network address to and from the alternative adapter.
Making your network more reliable under Solaris is very simple: The following is an example for a host called somehost with 2 hme interfaces:
Step 1. As root, type: eeprom "local-mac-address?=true"
Step 2. Modify your /etc/hosts to look like the 2nd of the two stanzas below:
---OLD-BELOW----------
# Internet host table
127.0.0.1 localhost
10.1.26.50 somehost.domain.com loghost
---NEW-BELOW---------
# Internet host table
127.0.0.1 localhost
# IP Multipathing
10.1.26.50 somehost somehost.domain.com loghost # data address
10.1.26.150 somehost-dum # dummy data address
10.1.26.153 somehost-hme0 # test address for hme0
10.1.26.155 somehost-hme1 # test address for hme1
Step 3. Modify your /etc/hostname.xxx files to be like these two:
# cat /etc/hostname.hme0
somehost-hme0 netmask + broadcast + \
group production deprecated -failover up \
addif somehost netmask + broadcast + failover up
# cat /etc/hostname.hme1
somehost-hme1 netmask + broadcast + \
group production deprecated -failover up \
addif somehost netmask + broadcast + failover up
Step 4. Plumb the 2nd hme0 interface
# ifconfig hme1 plumb
Step 5. Reboot.
The Blueprint from Sun can be found at http://www.sun.com/solutions/blueprints/1102/806-7230.p...
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