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if_mpadm(1m) [opensolaris man page]

if_mpadm(1M)						  System Administration Commands					      if_mpadm(1M)

NAME
if_mpadm - administer interfaces in an IP multipathing group SYNOPSIS
if_mpadm -d | -r ifname DESCRIPTION
The if_mpadm utility administers IP interfaces that are part of an IP Multipathing (IPMP) group. Currently, administration is limited to offlining IP interfaces and undoing previous offline operations. When an IP interface is taken offline, all IP data traffic that was flowing over the IP interface is moved to another IP interface in the IPMP group. In addition, all UP IP addresses hosted on the IP interface are brought down, causing in.mpathd(1M) to stop probe-based failure detection on the IP interface. As a result, an offline IP interface will not be used for any inbound or outbound IP traffic. Only IP inter- faces that are in an IPMP group may be brought offline. If the IP interface is the last functioning interface in the IPMP group, the off- line operation will fail. When an offline operation is undone, any IP addresses hosted on that IP interface are brought UP and will be considered by in.mpathd for probe-based failure detection. In addition, provided the IP interface is otherwise active (see in.mpathd(1M)), it will again be used to send and receive IP data traffic for the IPMP group. Note that not all offline operations can be undone. For instance, in.mpathd may have offlined an IP interface because its hardware address was not unique within its IPMP group. The ipmpstat utility can be used to determine why an IP interface is offline, identify which IP interfaces in a group are being used for inbound and outbound IP traffic, and more; see ipmpstat(1M). OPTIONS
The if_mpadm utility supports the following options: -d ifname Offline the IP interface specified by ifname. If ifname is not in an IPMP group, or the offline would cause the IPMP group to lose network connectivity, the operation will fail. -r ifname Undo a previous offline of the IP interface specified by ifname. If ifname is not offline, the operation will fail. EXAMPLES
Example 1 Offlining an IP Interface The following command offlines the IP interface under0, causing any IP packets that were being sent and received through it to be handled by another IP interface in its group. example% if_mpadm -d under0 Example 2 Undoing a Previous Offline Operation Use the following command to undo the operation in the previous example: example% if_mpdadm -r under0 ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Unstable | +-----------------------------+-----------------------------+ SEE ALSO
ifconfig(1M), in.mpathd(1M), ipmpstat(1M), attributes(5) DIAGNOSTICS
cannot offline: no other functioning interfaces are in its IPMP group. Description: This message means that offlining the IP interface would leave the IPMP group without network connectivity. cannot offline: not a physical interface or not in an IPMP group Description: This means that the IP interface is not an underlying interface in an IPMP group, and therefore is not eligible to be offlined. SunOS 5.11 5 Jan 2009 if_mpadm(1M)

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if_mpadm(1M)                                              System Administration 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 an IP 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 IP 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 an IP 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 interface. All network access will failover from hme0 to other interfaces in the same IP multipathing group. If no other interfaces are in the same group, the operation will fail. 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 to hme0. example% if_mpdadm -r hme0 ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Unstable | +-----------------------------+-----------------------------+ SEE ALSO
ifconfig(1M), in.mpathd(1M), attributes(5) DIAGNOSTICS
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 configuration was not suitable for com- pleting a failover. off-line cannot be undone because multipathing configuration is not consistent across all the interfaces in the group. This message means that some interfaces in the IP multipathing 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 5.10 3 Sep 2002 if_mpadm(1M)
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