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SunOS man pages : if_mpadm (1)

Maintenance Commands                                 if_mpadm(1M)

NAME

if_mpadm - change operational status of interfaces within a multipathing group

SYNOPSIS

/usr/sbin/if_mpadm -d interface_name /usr/sbin/if_mpadm -r interface_name

DESCRIPTION

Use the if_mpadm utility to change the operational status of interfaces that are part of a multipathing group. If the interface is operational, you can use if_mpadm -d to detach or off-line the interface. If the interface is off-lined, use if_mpadm -r to revert it to its original state. When a network interface is off-lined, all network access fails over to a different interface in the multipathing group. Any addresses that do not failover are brought down. Network access includes unicast, broadcast, and multicast for IPv4 and unicast and multicast for IPv6. Addresses marked with IFF_NOFAILOVER do not failover; they are marked down. After an interface is off-lined, the system will not use the interface for any outbound or inbound traffic, and the interface can be safely removed from the system without any loss of network access. The if_mpadm utility can be applied only to interfaces that are part of a multipathing group.

OPTIONS

The if_mpadm utility supports the following options: -d interface_name Detach or off-line the interface specified by interface_name. -r interface_name Reattach or undo the previous detach or off-line operation on the interface specified by interface_name. Unless the -d option was used to detach or off-line the interface, this option will fail.

EXAMPLES

Example 1: Detaching an Interface Use the following command to off-line or detach the inter- face. All network access will failback to hme0 from another interface in the group. SunOS 5.8 Last change: 11 Sep 2000 1 Maintenance Commands if_mpadm(1M) example% if_mpadm -d hme0 Example 2: Reattaching an Off-line Interface Use the following command to undo the previous operation. Network access will failback over to hme0 from an interface in the same multipathing group. example% if_mpdadm -r hme0

ATTRIBUTES

See attributes(5) for descriptions of the following attri- butes: ____________________________________________________________ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |_____________________________|_____________________________| | Availability | SUNWcsu | |_____________________________|_____________________________| | Interface Stability | Unstable | |_____________________________|_____________________________|

SEE ALSO

ifconfig(1M), in.mpathd(1M), attributes(5)

DIAGNOSTICS

Message Set Message Entry Message: Message text: off-line failed as there is no other functional interface available in the multipathing group for failing over the network access. This message means that other interfaces in the group are failed over already or the multipathing configura- tion was not suitable for completing a failover. Message Entry Message: Message text: off-line cannot be undone as failback has been disabled. FAILBACK is set to "no" in /etc/default/mpathd. Message Entry SunOS 5.8 Last change: 11 Sep 2000 2 Maintenance Commands if_mpadm(1M) Message: Message text: off-line cannot be undone because mul- tipathing configuration is not consistent across all the interfaces in the group. This message means that some interfaces in the mul- tipathing group are not configured consistently with other interfaces in the group, for example, one of the interfaces in the group does not have an IFF_NOFAILOVER address. SunOS 5.8 Last change: 11 Sep 2000 3