
Chapter 4: Feature Description
Ethernet Features
The following figure illustrates the PTP 820S services model, with traffic entering and leaving the
network element. PTP 820S’s switching fabric is designed to provide a high degree of flexibility in
the definition of services and the treatment of data flows as they pass through the switching fabric.
Figure 39 PTP 820S Services Core
P2P Service
Multipoint Service
SAP
SP
SAP
SP
SAP
SP
SAP
SP
SAP
SP
SAP
SP
Port 1
Port 2
Port 4
Port 4
Port 9
C-tag
=3000
C-tag
=20
Untag
C-tag=20
C-tag
=1000
to 2000
C
-tag
=10
SC
-tag
=2,
3
S-tag
=200
Smart Pipe Service
SAP
SP
SAP
SP
SAP
SP
SAP
SP
Port 3
Port 4
Port 8
Port 7
Port 5
Port 6
Frame Classification to Service Points and Services
Each arriving frame is classified to a specific service point, based on a key that consists of:
•
The Interface ID of the interface through which the frame entered the PTP 820S.
•
The frame’s C-VLAN and/or S-VLAN tags.
If the classification mechanism finds a match between the key of the arriving frame and a specific
service point, the frame is associated to the specific service to which the service point belongs.
That service point is called the ingress service point for the frame, and the other service points in
the service are optional egress service points for the frame. The frame is then forwarded from the
ingress service point to an egress service point by means of flooding or dynamic address learning
in the specific service. Services include a MAC entry table of up to 131,072 entries, with a global
aging timer and a maximum learning limiter that are configurable per-service.
Page 4-33
Содержание PTP 820S
Страница 1: ...Cambium PTP 820S Technical Description System Release 7 9 ...
Страница 27: ...Chapter 2 PTP 820S Hardware Description PoE Injector Figure 7 PoE Injector Ports Page 2 8 ...
Страница 156: ...Chapter 6 Standards and Certifications This chapter includes Supported Ethernet Standards Page 6 1 ...
Страница 208: ...Term Definition XPIC Cross Polarization Interference Cancellation Page IV ...