Channel path access and candidate lists

If a channel path is either shared or reconfigurable, you can specify which LPs have access to that channel path. Use the channel path access list with or without the channel path candidate list.

Channel Path Access List

An LP has initial access to a channel path if the LP is on that channel path’s access list.

For the first power-on reset with an LPAR IOCDS, the access list defines which LPs will initially have the channel path configured online. Reconfigurable and shared CHPIDs may later be accessed by LPs not in the access list. Subsequent power-on resets with the same LPAR IOCDS will have any reconfigurations applied and the LPs may have access to channel paths other than those that were specified in the initial access lists for the channel paths. See Channel path reconfiguration and logical partition activation for more information on assigning channel paths to an LP.

Channel Path Candidate List

An LP can gain access to a channel path if the LP is on that channel path’s candidate list. An LP is allowed to configure a channel path online if the LP is in that channel path’s candidate list.