Et hernet bridging
Chapt er 1: Product descript ion
1- 46
phn- 2513_004v000 ( Oct 2012)
The wireless link down alert can be deployed in networks which provide alternative traffic
routes in the event of failure. Spanning Tree Protocol (STP) and Ethernet Automatic
Protection Switching (EAPS) are two protocols which are commonly deployed in such
complex networks and both react to the wireless link down alert.
Protocol model
Ethernet bridging behavior at each end of the wireless link is equivalent to a three-port,
managed, transparent MAC bridge where the three ports are:
•
Ethernet Management Port
•
Ethernet Data Port
•
Wireless Port
Frames are transmitted at the Wireless port over a proprietary point-to-point circuit-mode
link layer between ends of the PTP 800 link. For a single CMU configuration or the active
CMU in a 1+1 Hot Standby configuration, Ethernet frames received at the data or
management ports, or generated internally within the management agent, are
encapsulated within a lightweight MAC layer for transmission over the wireless link.
For the inactive CMU at a protected end no traffic is transmitted over the wireless link.
Any management traffic generated is transmitted towards the management port (for out-
of-band management) or the traffic port (for in-band management).
Forwarding behavior
In out-of-band local mode (
), the management
network (shown in red) is isolated from the customer data network (shown in blue). In out-
of-band mode, the management network is isolated from the customer data at the wireless
port by use of a separate service access point and associated dedicated logical channel.
Ethernet frames will not leak between management and data networks, even in the
presence of configuration errors.
In in-band mode (
), the management and customer data networks are not
isolated, and the Management port is not used.
Summary of Contents for PTP 800 Series
Page 1: ...Cambium PTP 800 Series User Guide System Release 800 05 02 ...
Page 40: ...Licensing requirements About This User Guide 10 phn 2513_004v000 Oct 2012 ...
Page 232: ...Limit of liability Chapter 3 Legal information 3 22 phn 2513_004v000 Oct 2012 ...
Page 322: ...Radiation hazard assessm ent Chapter 4 Reference information 4 90 phn 2513_004v000 Oct 2012 ...
Page 428: ...Replacing IRFU components Chapter 5 Installation 5 106 phn 2513_004v000 Oct 2012 ...
Page 630: ...Using recovery mode Chapter 7 Operation 7 78 phn 2513_004v000 Oct 2012 ...