Ipmp Overview For Oracle Solaris Users - Oracle Exalogic Elastic Cloud Owner's Manual

Introduction to Oracle Exalogic Network Configuration
• Ethernet over InfiniBand (EoIB) - bond1 link, which uses two vNICs, such as
vNIC0 and vNIC1 for ib0 and ib1 (vNIC0 and vNIC1 for ibp0 and ibp1 on
Oracle Solaris), respectively.

6.6.4 IPMP Overview for Oracle Solaris Users

On the Oracle Solaris operating system, IP network multipathing (IPMP) provides
physical interface failure detection and transparent network access failover for a
system with multiple interfaces on the same IP link. IPMP also provides load
spreading of packets for systems with multiple interfaces.
This section discusses the following topics:
• IPMP Components
• IPMP Groups
6.6.4.1 IPMP Components
IPMP comprises the following components:
• The in.mpathd daemon
• The /etc/default/mpathd configuration file
• ifconfig options for IPMP configuration
6.6.4.2 IPMP Groups
An IP multipathing group, or IPMP group, consists of one or more physical interfaces
on the same system that are configured with the same IPMP group name. All
interfaces in the IPMP group must be connected to the same IP link. The same (non-
null) character string IPMP group name identifies all interfaces in the group. You can
place interfaces from NICs of different speeds within the same IPMP group, as long as
the NICs are of the same type. IPMP groups on Oracle Solaris provide the same
functionality as Bonded Interfaces on Oracle Linux in the Exalogic environment. For
example, the default IPMP group ipmp0 comprises two physical interfaces that are
connected to the default IPoIB link for internal communication in your Exalogic
machine. The other default IPMP group ipmp1 comprises two virtual interfaces that
are connected to the default EoIB link for external data center connectivity.
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Note:
Oracle Solaris uses the IP Multipathing (IPMP) technology to support IPMP
Groups that provide the same functionality as bonded interfaces on Oracle
Linux. If you are using Oracle Solaris on Exalogic compute nodes, you can
name the IPMP groups anything. In this guide, BOND0 and BOND1 are used as
example names to keep the terminology consistent with Oracle Linux.
Note:
For information about the in.mpathd daemon and the mpathd configuration
file, see the in.mpathd (1M) man page on the Oracle Solaris operating system
installed on Exalogic compute nodes. For information about ifconfig, see
the ifconfig (1M) man page.