How to Implement IPMP on Solaris

How to Implement IPMP on Solaris

Contents

• 1 Preamble


• 2 Prerequisites


• 3 Setup


• 4 Final notes

Preamble

This document is intended to give fast overview and sample way to implement IPMP on SUN Solaris. IPMP play very important role in SUN strategy to provide high availability in Solaris. Basic idea is to have IP address why “switch” between physical interfaces in case of will fail on one of them

Prerequisites

1. To implement IPMP you need to have on the machine 2 NICs with unique MAC addresses
2. NICs in IPMP group should have same media type (i.e. Ethernet or ATM for example)
3. NICs should be be connected to the same switch or hub. In case of switch check if they are in same VLAN (if configured)
4. Loaded ip module to the interface

# ifconfig e1000g2 modlist 0 arp 1 ip 2 e1000g

5. If you do not have it execute

# ifconfig e1000g2 modinsert ip

6. Working gateway for IPs used in IPMP group

Setup

1. set in /etc/hostname.e1000g2 and /etc/hostname.e1000g3 the appropriate parameters for to attach interfaces to the group named test and set additional IP address

# cat /etc/hostname.e1000g2 sun3-2-1 netmask + broadcast + failover group test up addif sun3-2 netmask + broadcast + -failover deprecated up # cat /etc/hostname.e1000g3 sun3-2-2 netmask + broadcast + failover group test up

2. activate the interfaces

# ifconfig e1000g2 plumb # ifconfig e1000g3 plumb # ifconfig e1000g2 `cat /etc/hostname.e1000g2 ` Setting netmask of e1000g2 to 255.255.255.0 Created new logical interface e1000g2:1 Setting netmask of e1000g2:1 to 255.255.255.0 # ifconfig e1000g3 `cat /etc/hostname.e1000g3 ` Setting netmask of e1000g3 to 255.255.255.0

3. Check what's happen with interfaces and IPs

# ifconfig -a lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1 inet 127.0.0.1 netmask ff000000 e1000g1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2 inet 192.168.1.88 netmask ffffff00 broadcast 192.168.1.255 ether 0:c:29:b2:8f:92 e1000g2: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 12 inet 10.0.1.12 netmask ffffff00 broadcast 10.0.1.255 groupname test ether 0:c:29:b2:8f:9c e1000g2:1: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 12 inet 10.0.1.32 netmask ffffff00 broadcast 10.0.1.255 e1000g3: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 10 inet 10.0.1.22 netmask ffffff00 broadcast 10.0.1.255 groupname test ether 0:c:29:b2:8f:b0

Final notes

Of course the above example give just very brief explanation and sample configuration. For more information take a look on the official SUN documentations and especially System Administration Guide: IP Services (816-4554)