Avaya Configuring Ethernet, FDDI, and Token Ring Services Uživatelský manuál stáhnout pdf (Strana 45)

Configuring FDDI Services

305259-A Rev 00

3-7

Enabling or Disabling Hardware Filtering

When you add a FDDI circuit for a link module with hardware filtering capability,

hardware filtering is disabled by default.

With hardware filtering enabled, the FDDI interface drops local frames instead of

copying them into system memory to be processed by the bridge software. Local

frames are frames that contain both destination and source media access control

(MAC) addresses that the router has learned on the interface. Bridge software

teaches the hardware filter which MAC addresses are local to an interface.

Enabling hardware filtering improves bridging software performance, because the

router software does not need to determine whether to receive and reject local

frames.

You can enable or disable hardware filtering on an interface. Enable hardware

filtering only if the FDDI link module has hardware filters and you enabled bridge

software.

Using the BCC

To enable hardware filtering, access an existing FDDI line service and enter:

hardware-filter enable

To disable hardware filtering, access an existing FDDI line service and enter:

hardware-filter disable

For example, to enable hardware filtering, enter the following command

sequence:

box#

fddi slot 11 connector 1

fddi/11/1#

hardware-filter enable

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Avaya Configuring Ethernet, FDDI, and Token Ring Services Uživatelský manuál Strana 45