Cambium PTP 670 Series, Руководство пользователя

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Chapter 1: Product description Ethernet bridging
Page 1-36
For information about… Refer to…
How to configure Ethernet quality of service QoS Configuration page on page 6-56
How to monitor Ethernet performance System statistics on page 7-54
Out-of-Band Management Service
Transparent Ethernet service
The PTP 670 Series provides an optional Ethernet service for out-of-band network management
between Ethernet ports at a local ODU and Ethernet ports at an associated remote ODU. The
Ethernet service is based on conventional layer two transparent bridging. The PTP 670
maintains complete separation between Ethernet traffic in the customer Data Service and the
Management Service.
The service is transparent to untagged frames, standard VLAN frames, priority-tagged frames,
provider bridged frames, Q-in-Q frames and provider backbone bridged frames. In each case,
the service preserves MAC addresses, VLAN ID, Ethernet priority and Ethernet payload in the
forwarded frame. The maximum frame size for bridged frames in the management network is
2000 bytes.
There is no requirement for the management network to be connected to the same Ethernet
ports at both ends of a wireless link. For example, it is possible to connect the Main PSU port to
the management network at one end of the link and to connect the Aux port to the
management network at the other end of the link.
Layer two control protocols
The Management Service in the PTP 670 Series is transparent to layer two control protocols
(L2CP) including:
•
Spanning tree protocol (STP), rapid spanning tree protocol (RSTP)
•
Multiple spanning tree protocol (MSTP)
•
Link aggregation control protocol (LACP)
•
Link OAM, IEEE 802.3ah
•
Port authentication, IEEE 802.1X
•
Ethernet local management interface (E-LMI), ITU-T Q.933.
•
Link layer discovery protocol (LLDP)
•
Multiple registration protocol (MRP)
•
Generic attribute registration protocol (GARP)
The management service in the PTP 670 Series does not generate or respond to any L2CP
traffic.
Quality of service for bridged Ethernet traffic
The PTP 670 Series supports a single traffic queue in the Management Service for Ethernet
frames waiting for transmission over the wireless link. The priority of the queue can be varied
with respect to the eight queues used for the Data Service.