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AIX Version 4.3 System Management Guide: Communications and Networks

Installing GDLC Data Link Controls

You can install DLCs separately or in a group. A DLC device manager is automatically added into the kernel and set to the "Available" state for each type of DLC installed. Installation can be verified by issuing the lslpp command as follows:

lslpp -h dlctype

where dlctype is one of the following:

bos.dlc.8023 IEEE Ethernet (802.3) Data Link Control
bos.dlc.ether Standard Ethernet Data Link Control
bos.dlc.fddi FDDI Data Link Control
bos.dlc.sdlc SDLC Data Link Control
bos.dlc.token Token-Ring Data Link Control

Information about an installed DLC can be displayed through Web-based System Manager, the System Management Interface Tool (SMIT), or the command line. On heavily used systems or communications ports, it may be necessary to change the DLC attributes to fine-tune the DLC's performance. If receive performance is slow, and the system error log indicates that ring queue overflow is occurring between the DLC and its device handler, increase the DLC's queue depth for incoming data. Finally, it is advisable to remove an installed DLC from the kernel when it is not needed for a lengthy period of time. This removal does not deinstall the DLC from the system, but allows kernel resources to be freed for other tasks until the DLC is needed again. Instructions for all of these tasks are in "Managing DLC Device Drivers" .

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