Confused with entries in /etc/hostname.<interface> file...

UNIX Solaris
1

Hi.. Every one,

I have servers installed with solaris 10.We have configured our servers for IPMP and we have respective entries in /etc/hostname.<interface> for every physical interface.
for example one of the file contains :

# more /etc/hostname.ce6
super-ce6 netmask + broadcast + group accgrp deprecated -failover up addif super-dummy netmask + broadcast + deprecated up

Can any one explain me what these entries do...????

What is the purpose of " addif " and " -failover " also why two " up "
are used.

o/p of ifconfig -a :
 
# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
ce5: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 3
        inet 10.66.23.112 netmask ffffff00 broadcast 10.66.23.255
        ether 0:14:4f:67:cb:d3
ce6: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 4
        inet 10.66.22.74 netmask ffffff00 broadcast 10.66.22.255
        groupname accgrp
        ether 0:14:4f:69:c2:c8
ce6:1: flags=1040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4> mtu 1500 index 4
        inet 10.66.22.108 netmask ffffff00 broadcast 10.66.22.255
ce6:2: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 4
        inet 10.66.22.64 netmask ffffff00 broadcast 10.66.22.255
ce10: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 2
        inet 10.66.22.84 netmask ffffff00 broadcast 10.66.22.255
        groupname accgrp
        ether 0:14:4f:69:c2:e0

 
o/p of more /etc/hosts:
 
# more /etc/hosts
10.66.22.64     super  loghost 
10.66.22.74     super-ce6
10.66.22.84     super-ce10
10.66.22.108    super-dummy
10.66.23.112    super-ce5

Thanks in Advance.....

2

So you implemented a technology without knowing what it does? Was any attempt made to read the documentation? Does the current configuration work and you're just curious or is something broken and you're taking the long road around to figuring out how to fix it?

addif creates a new virtual interface (like ce0:2)
There are two 'UP's because you're 'UP'ing two interfaces, the real and virtual.
failover is an instruction that tells the kernel you need one interface to "fail over" to the next.

3

Hi.. seg,
Thanks for replying......
Actually I am new to Solaris and the company in which I am working,
is implementing this technology and I was just curious to know this....

Thanks for giving me the idea......
Could you provide me any material having a bit deep information or related links for the same....

Thanks...

4

sun docs have lots on ipmp and lacp. :smiley:
A P P E N D I X B - Link Aggregation Control Protocol