HP StorageWorks 1606 Brocade Fabric OS Administrator's Guide v6.3.0 (53-100133 - Page 52

1 The Ethernet interface on your switch Fibre Channel Subnetmask [255.255.0.0]: Gateway IP Address [10.1.2.1]: DHCP [On]:off IPv6 autoconfiguration IPv6 can assign multiple IP addresses to each network interface. Each interface is configured with a link local address in almost all cases, but this address is only accessible from other hosts on the same network. To provide for wider accessibility, interfaces are typically configured with at least one additional global scope IPv6 address. IPv6 autoconfiguration allows more IPv6 addresses, the number of which is dependent on the number of routers serving the local network and the number of prefixes they advertise. NOTE An upgrade from Fabric OS v6.1.0 or earlier, which does not support IPv6 autoconfiguration, to a platform that does support IPv6 autoconfiguration, such as Fabric OS v6.2.0 or later, will cause IPv6 autoconfiguration to be enabled on the upgraded platform. In upgrades or downgrades between versions of Fabric OS that support autoconfiguration, the enabled state of IPv6 autoconfiguration will not be changed. There are two methods of autoconfiguration for IPv6 addresses, stateless and stateful. Stateless allows an IPv6 host to obtain a unique address using the IEEE 802 MAC address; stateful uses a DHCPv6 server which keeps a record of the IP address and other configuration information for the host. Whether a host engages in autoconfiguration and which method it uses is dictated by the routers serving the local network, not by a configuration of the host. There can be multiple routers serving the network, each potentially advertising multiple network prefixes. Thus the host is not in full control of the number of IPv6 addresses that it configures, much less the values of those addresses, and the number and values of addresses can change as routers are added to or removed from the network. When IPv6 autoconfiguration is enabled, the platform will engage in stateless IPv6 autoconfiguration. When IPv6 autoconfiguration is disabled, the platform will relinquish usage of any autoconfigured IPv6 addresses that it may have acquired while it was enabled. This same enable and disable state also enables or disables the usage of a link local address for each managed entity, though a link local address will continue to be generated for each nonchassis-based platform and for each CP of a chassis-based platform because those link local addresses are required for router discovery. The enabled or disabled state of autoconfiguration is independent of whether any static IPv6 addresses have been configured. Setting IPv6 autoconfiguration 1. Connect to the switch and log in using an account assigned to the admin role. 2. Take the appropriate following action based on whether you want to enable or disable IPv6 autoconfiguration: • Enter the ipAddrSet -ipv6 -auto command to enable IPv6 autoconfiguration for all managed entities on the target platform. • Enter the ipAddrSet -ipv6 -noauto command to disable IPv6 autoconfiguration for all managed entities on the target platform. 10 Fabric OS Administrator's Guide 53-1001336-01