Islb Vrrp - Cisco MDS 9000 series Command Reference Manual

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islb vrrp

S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

To configure iSCSI server load balancing (iSLB) on a Virtual Router Redundancy Protocol (VRRP)

group, use the islb vrrp command. To disable the iSLB configuration on the VRRP group, use the no

form of the command.

Syntax Description

group-number

load-balance

group-number

load-balance

Command Modes

Configuration mode.

Command History

Usage Guidelines

The host is configured with a VRRP address as the portal address. When the VRRP master port receives

the first iSCSI session from an initiator, it assigns a slave port to serve that particular host. The

information is synchronized to all switches via Cisco Fabric Services (CFS) if recovery is needed when

a master port fails. The initiator gets a temporary redirect iSCSI login response. The host then logs in to

the slave port at its physical IP address. If the slave port goes down, the host will revert to the master

port. The master port knows through CFS that the slave port has gone down and redirects the host to

another slave port.

There are separate VRRP groups for IPv4 and IPv6. Each address family is allowed 256 virtual routers.

An initiator can also be redirected to the physical IP address of the master interface.

The load balancing distribution is based on the number of initiators on a port and not on the number of

Cisco MDS 9000 Family Command Reference

islb vrrp {group-number load-balance | ipv6 group-number load-balance}

no islb vrrp {group-number load-balance | ipv6 group-number load-balance}

Specifies an IPv4 Virtual Router group number. The range is 1 to 255.

Enables load balancing on the VRRP group.

Specifies IPv6 on the VRRP group.

Specifies an IPv6 Virtual Router group number. The range is 1 to 255.

Enables load balancing on the VRRP group.

Modification

This command was introduced.

OL-8413-07, Cisco MDS SAN-OS Release 3.x