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
11-111
Cisco MDS 9000 Family Command Reference
OL-18089-01, Cisco MDS NX-OS Release 4.x
Chapter 11 I Commands
islb vrrp
islb vrrp
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.
islb vrrp
{
group-number
load-balance
| ipv6
group-number
load-balance
}
no islb vrrp
{
group-number
load-balance
| ipv6
group-number
load-balance
}
Syntax Description
Defaults
None.
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.
Note
An initiator can also be redirected to the physical IP address of the master interface.
Tip
The load balancing distribution is based on the number of initiators on a port and not on the number of
sessions.
group-number
Specifies an IPv4 Virtual Router group number. The range is 1 to 255.
load-balance
Enables load balancing on the VRRP group.
ipv6
Specifies IPv6 on the VRRP group.
group-number
Specifies an IPv6 Virtual Router group number. The range is 1 to 255.
load-balance
Enables load balancing on the VRRP group.
Release
Modification
3.0(1)
This command was introduced.