Avaya Configuring Ethernet, FDDI, and Token Ring Services Uživatelský manuál stáhnout pdf (Strana 43)

Configuring FDDI Services

117344-A Rev. A 3-7

Enabling or Disabling Hardware Filtering

When you add a FDDI circuit for a link module with hardware ﬁlter 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, since 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:

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 43