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New to Solaris IPMP (conversion from Linux)

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Operating Systems Solaris New to Solaris IPMP (conversion from Linux)
# 8  
Old 10-01-2015
Quote:
IPMP provides increased reliability, availability, and network performance for systems with multiple physical interfaces. Occasionally, a physical interface or the networking hardware attached to that interface might fail or require maintenance. Traditionally, at that point, the system can no longer be contacted through any of the IP addresses that are associated with the failed interface. Additionally, any existing connections to the system using those IP addresses are disrupted.

By using IPMP, you can configure one or more physical interfaces into an IP multipathing group, or IPMP group. After configuring IPMP, the system automatically monitors the interfaces in the IPMP group for failure. If an interface in the group fails or is removed for maintenance, IPMP automatically migrates, or fails over, the failed interface's IP addresses. The recipient of these addresses is a functioning interface in the failed interface's IPMP group. The failover feature of IPMP preserves connectivity and prevents disruption of any existing connections. Additionally, IPMP improves overall network performance by automatically spreading out network traffic across the set of interfaces in the IPMP group. This process is called load spreading.
# 9  
Old 10-01-2015
Hi duke2nuke,

Thanks for the quote. Precisely that's what I am asking about. How does an ipmp group load spread its traffic ?

If I am to send a file , or establish some tcp handshake or session, does packets get spread across the 2 interfaces which uses 2 different source macs and ips - wouldn't that be an issue ?

Regards,
Noob
# 10  
Old 10-01-2015
As stated before, the purpose of IPMP is to increase redundancy. Usually this is an asymmetric approach, active/standby.
Even if active/active with IPMP is advertised - I have only seen broken ones.

For symmetric load spreading the dynamic link aggregation was developed, and it also provides redundancy. It needs LACP. While a non-LACP mode is advertised - I have only seen a broken one.

In post#2 I have given configuration examples that WORK.
This User Gave Thanks to MadeInGermany For This Post:
javanoob
# 11  
Old 10-02-2015
Well i'm using active - passive with test addresses on 11.1 Smilie

I have tested LACP with IPMP over 2 x LACP (active-passive), which works fine.

Other stuff did not pass physical tests (unplugging or port shut) on current patchset i'm running. Stuff like transitive probing and active active ipmp.

Stuff gets fixed tho, but having to make test like that for every update ..... not so enterprise Smilie.

DLMP - didn't try, but i've have heard that it works in newer releases.

Regards
Peasant.
# 12  
Old 10-03-2015
Dear all,

Thanks for the valuable feed backs. It do seems like active,active might not be the common option/setup despite having the "active, active" functionality.

Lastly, can i check , is there any configurations command we can use to check if our setup is ACTIVE,ACTIVE or ACTIVE,standby ?

On ifconfig -a, i do not see any "STANDBY" wording in the output for the interfaces.

Regards,
Noob
# 13  
Old 10-03-2015
Please give ifconfig -a output. (ip- and mac-address X'd out.)
# 14  
Old 10-03-2015
Quote:
Originally Posted by MadeInGermany
Please give ifconfig -a output. (ip- and mac-address X'd out.)
Hi MadeInGermany,

Please see output as below ->

Code:
-bash-3.2$ cat /etc/hostname.igb0
universe group IPMP
-bash-3.2$ cat /etc/hostname.igb1
universe-igb1 group IPMP

--/etc/hosts
192.168.7.51    universe loghost universe.planet.com
192.168.7.52    universe-igb1


-bash-3.2$ cat  /etc/default/mpathd
#
#pragma ident   "@(#)mpathd.dfl 1.2     00/07/17 SMI"
#
# Time taken by mpathd to detect a NIC failure in ms. The minimum time
# that can be specified is 100 ms.
#
FAILURE_DETECTION_TIME=10000
#
# Failback is enabled by default. To disable failback turn off this option
#
FAILBACK=yes
#
# By default only interfaces configured as part of multipathing groups
# are tracked. Turn off this option to track all network interfaces
# on the system
#
TRACK_INTERFACES_ONLY_WITH_GROUPS=yes



igb0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 192.168.7.51 netmask ffffff00 broadcast 192.168.7.255
        groupname IPMP
        ether b0:99:28:98:82:18
igb0:1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 192.168.7.50 netmask ffffff00 broadcast 192.168.7.255
igb1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
        inet 192.168.7.52 netmask ffffff00 broadcast 192.168.7.255
        groupname IPMP
        ether b0:99:28:98:82:19

Thanks.
Regards,
Noob
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