Islb Vrrp - Cisco MDS 9000 series Command Reference Manual

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
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.
Syntax Description group-number
load-balance
ipv6
group-number
load-balance
Defaults None.
Command Modes Configuration mode.
Command History Release
3.0(1)
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.
Note
The load balancing distribution is based on the number of initiators on a port and not on the number of
Tip
sessions.
Cisco MDS 9000 Family Command Reference
11-108
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.
Chapter 11 I Commands
OL-8413-07, Cisco MDS SAN-OS Release 3.x