Mac Address Of The Switch - Alaxala AX2200S Series Configuration Manual

13 Ethernet
(a) DSAP field
The DSAP field indicates the destination service access point to which the LLC information
section will be sent.
(b) SSAP field
The SSAP field indicates the source service access point from which the LLC information
section was sent.
(c) CONTROL field
The CONTROL field indicates one of the following three formats: information transfer
format, monitoring format, or non-numeric control format.
(d) OUI field
The OUI field indicates an organizationally unique identifier of the organization that sent the
SNAP information section.
(e) PID
The PID field indicates the Ethernet type with which the SNAP information section was
sent.
(3) Conditions for discarding received frames
Frames satisfying any of the following conditions are discarded:

The frame length is not a multiple of an octet.

The length of the received frame (from DA to FCS) is either less than 64 octets or
more than 1522 octets.
If the use of jumbo frames is selected, the length of the received frame exceeds the
specified size.

An FCS error has occurred.

A collision occurred during reception of the frame on a half-duplex connection
interface.
(4) Handling of padding
If the length of a sent frame is less than 64 octets, padding is added immediately before the
FCS field. The values to be padded are undefined.

13.1.4 MAC address of the Switch

(1) Switch MAC addresses
The Switch has one MAC address as a device identifier. This MAC address is called the
device MAC address. The device MAC address is used as the device ID used for protocols,
such as a Spanning Tree Protocol.
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