Cambium PTP 670 Series, Руководство пользователя

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Chapter 1: Product description Ethernet bridging
Page 1-32
One to three Ethernet ports may be allocated to the Data Service. If In Band Management is
configured, management access shares the same set of ports.
If Out of Band Management is configured, up to two ports may be allocated to the
Management service. These ports are not used by the Data Service.
Up to two ports can be allocated to the Local Management Service.
Data Service
Transparent Ethernet service
The PTP 670 Series provides an Ethernet service 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, and is equivalent to the Ethernet Private Line (EPL) service
defined by the Metro Ethernet Forum (MEF).
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 customer network is
9600 bytes.
There is no requirement for the customer data 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 customer data network at one end of the link and to connect the Aux port to the customer
data network at the other end of the link.
In the HCMP topology, more than one port may be allocated to the Data Service.
Layer two control protocols
The Data 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 PTP 670 Series does not generate or respond to any L2CP traffic.
Quality of service for bridged Ethernet traffic
In the PTP wireless topology, the PTP 670 supports eight traffic queues in the Data Service for
Ethernet frames waiting for transmission over the wireless link. In the HCMP wireless topology,
the PTP 670 supports four queues for each wireless link.