Software User's Guide Version 3.4

MPC Virtual Channel Dynamic Reconfiguration Support

This section describes dynamic reconfiguration (DR) as it affects Talk 6 and Talk 5 commands.

CONFIG (Talk 6) Delete Interface

MPC Virtual Channel supports the CONFIG (Talk 6) delete interface command with no restrictions.

GWCON (Talk 5) Activate Interface

MPC Virtual Channel supports the GWCON (Talk 5) activate interface command with the following considerations:

• The base channel (ESCON or PCA) interface for this MPC virtual interface must be active.
• The MAXDATA for this MPC virtual interface cannot be higher than the highest MAXDATA of the virtual interfaces already on the base channel (ESCON or PCA) interface that this MPC virtual interface is on.
• The subchannels for this MPC virtual interface cannot already be in use by another virtual interface (MPC, LCS, or LSA) on the base channel (ESCON or PCA) interface that this MPC virtual interface is on.
• The addition of any new subchannels to the base channel (ESCON or PCA) interface will not put the base channel interface over its maximum number of subchannels.
• There is sufficient storage to add another virtual interface to the base channel (ESCON or PCA) interface. If additional storage is needed, a message will be displayed on the console.

All MPC Virtual Channel interface-specific commands are supported by the GWCON (Talk 5) activate interface command.

GWCON (Talk 5) Reset Interface

MPC Virtual Channel supports the GWCON (Talk 5) reset interface command with the following considerations:

• The MPC virtual interface reset will not be allowed if the changes require adapter modifications. Adapter modifications are required for the following changes:
  • Changing the LAN type or LAN number.
  • Changing the BLKLEN or ACKLEN.
  • Changing the subchannels, adding a new subchannel, or deleting an existing subchannel from this MPC interface.

  For any of the these changes, you are required to reset the entire base channel (ESCON or PCA) interface.

• The MPC virtual interface must already be activated.
• The MAXDATA for the MPC virtual interface is not greater than the highest MAXDATA of the base channel (ESCON or PCA) interface.

All MPC Virtual Channel interface-specific commands are supported by the GWCON (Talk 5) reset interface command.

GWCON (Talk 5) Temporary Change Commands

MPC Virtual Channel supports the following GWCON commands that temporarily change the operational state of the device. These changes are lost whenever the device is reloaded, restarted, or you execute any dynamically reconfigurable command.

Commands

GWCON, net, tune acklen Note: Changes the operational value of the ACKLEN (acknowledgement length)

GWCON, net, tune blktimer Note: Changes the operational value of the BLKTIMER (block timer)