Cambium Networks PTP 820S, Техническое описание, Страница: 71 / 208

Chapter 4: Feature Description Ethernet Features
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Service Admin Mode – Defines whether or not the service is functional, i.e., able to receive and
transmit traffic. When the Service Admin Mode is set to Operational, the service is fully
functional. When the Service Admin Mode is set to Reserved, the service occupies system
resources but is unable to transmit and receive data.
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EVC-ID – The Ethernet Virtual Connection ID (end-to-end). This parameter does not affect the
network element’s behavior, but is used by the NMS for topology management.
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EVC Description – The Ethernet Virtual Connection description. This parameter does not affect
the network element’s behavior, but is used by the NMS for topology management.
• Maximum Dynamic MAC Address Learning per Service – Defines the maximum number of
dynamic Ethernet MAC address that the service can learn. This parameter is configured with a
granularity of 16, and only applies to dynamic, not static, MAC addresses.
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Static MAC Address Configuration – Users can add static entries to the MAC forwarding table.
The global aging time does not apply to static entries, and they are not counted with respect to
the Maximum Dynamic MAC Address Learning. It is the responsibility of the user not to use all
the 131,072 entries in the table if the user also wants to utilize dynamic MAC address learning.
• CoS Mode – Defines whether the service inherits ingress classification decisions made at
previous stages or overwrites previous decisions and uses the default CoS defined for the
service. For more details on PTP 820S’s hierarchical classification mechanism, see
Classification on page 4-60.
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Default CoS – The default CoS value at the service level. If the CoS Mode is set to overwrite
previous classification decisions, this is the CoS value used for frames entering the service.
• xSTP Instance (0-46, 4095) – The spanning tree instance ID to which the service belongs. The
service can be a traffic engineering service (instance ID 4095) or can be managed by the xSTP
engines of the network element.
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Split Horizon Group (Enable/Disable) – Service points in the same split horizon group cannot
send frames among themselves. This enables operators to isolate different traffic streams
within a single service. This parameter defines whether to enable or disable the split horizon
mechanism. PTP 820S supports up to four different split horizon groups for each service. On
the service point level, users can define which service point belongs to which group.
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Service Points
Service points are logical entities attached to the interfaces that make up the service. Service
points define the movement of frames through the service. Without service points a service is
simply a virtual bridge with no ingress or egress interfaces.
PTP 820S supports several types of service points:
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Management (MNG) Service Point – Only used for management services. The following figure
shows a management service used for in-band management among four network elements in
a ring. In this example, each service contains three MNG service points, two for East-West
management connectivity in the ring, and one serving as the network gateway.
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Reserved for future use.
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Reserved for future use.
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