HP Cisco MDS 9500 Cisco MDS 9000 Family Command Reference - Cisco MDS SAN-OS R - Page 703
islb vrrp
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Chapter 11 I Commands islb vrrp Send documentation comments to [email protected] 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 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. Defaults None. Command Modes Configuration mode. Command History Release 3.0(1) Modification This command was introduced. 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. OL-16217-01, Cisco MDS SAN-OS Release 3.x Cisco MDS 9000 Family Command Reference 11-111
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