Motorola PTP 500 User's Guide download pdf (Page 75)

PTP 300 and PTP 500 Series User Guide Ethernet bridging

phn-1115_006v000

Sep 2010

1-35

In-band management

In the in-band management mode, the management agent can be reached from the

Ethernet port at the local ODU, and (assuming that the wireless link is established) the

Ethernet port at the remote ODU.

Management frames in the customer network are processed by the management agent

if (a) destination MAC address in the frame matches the CMU MAC address, and (b)

the VLAN ID in the frame matches the VLAN configuration of the management agent.

If Local Packet Filtering is enabled, unicast frames forwarded to the management

agent are filtered, that is, not forwarded in the customer network.

In-band quality of service

Frames generated within the management agent may be assigned a configured

Ethernet priority. Management frames are multiplexed with customer frames of the

same priority for transmission at the wireless port.

Source address learning

If Local Packet Filtering is enabled, the system learns the location of end stations from

the source addresses in received management frames. The agent filters transmitted

management frames to ensure that the frame is transmitted at the Ethernet port, or

over the wireless link as appropriate. If the end station address is unknown, then

management traffic is transmitted at the Ethernet port and over the wireless link.

Wireless link down alert

The PTP 300 and PTP 500 Series provide an optional indication of failure of the

wireless link by means of a brief disconnection of the data port. The Wireless link

down alert can be used to trigger protection switching by Spanning Tree Protocol

(STP) or Ethernet Automatic Protection Switching (EAPS) in a redundant network.

Back-to-back links

PTP 300 and PTP 500 will not operate correctly if a direct cabled connection is made

between two PIDUs. Where two or more links are deployed in a chain, always use an

Ethernet switch or router to interconnect the links at the relay points.

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Motorola PTP 500 User's Guide Page 75