PTP 800 Series User Guide
Planning 1+ 1 Hot St andby links
phn- 2513_004v000 ( Oct 2012)
2- 47
Ethernet Switch Requirements for Receive Diversity
In addition to the Ethernet Switch features required to support operation of a 1+1 Hot
Standby link, further features are required when Receive Diversity is enabled. This is
because the Ethernet Switch must bridge special Receive Diversity Ethernet Frames from
the Inactive CMU to the Active CMU. The payload of these frames contains the
demodulated and decoded data received at the wireless interface of the Inactive CMU. The
Active CMU can then make use of the data received at the wireless interface of either
CMU.
•
The customer data ports which connect the Ethernet Switch to the CMU must be
capable of negotiating at 1 Gbps full duplex. This is to ensure that latency is kept to a
minimum and that the highest capacity configurations can be supported. Note that
Receive Diversity Frames are not sent from the Inactive CMU if either CMU has
trained at less than 1 Gbps full duplex.
•
The Ethernet Switch must support the configuration of Virtual LANs using either
802.1Q or 802.1ad. Configuring a dedicated VLAN to bridge Receive Diversity Ethernet
Frames from the Inactive CMU to the Active CMU prevents these frames from flooding
the network.
•
The network configurations are identical to those described for the 1+1 Hot Standby
configurations (see
Network configurations for 1+1
on page
), with the exception
of the Fiber-Y configuration. In addition to connecting the Fiber ports of the CMU to
the Ethernet switch using Fiber-Y, the copper data ports of the CMUs must also
connect to the Ethernet switch (see
). The copper data port will only be used
for forwarding Receive Diversity Frames out of the Inactive CMU which will necessarily
have its fiber port disabled in the Fiber-Y configuration. Customer data will only ever
be forwarded to and from the Fiber port of the Active CMU ensuring that the Fiber-Y
configuration meets the requirement for a single customer data port at the Ethernet
switch.
VLAN considerations for Receive Diversity
The ports which connect the Ethernet Switch to the CMUs must be configured into a
dedicated VLAN for Receive Diversity Ethernet Frames. Only these two ports must be
configured in this VLAN to prevent the frames from flooding the network. Existing VLANs
configured for these ports will not be affected. The following attributes must be considered
when planning for Receive Diversity.
•
Select either C-TAG (802.1Q) or S-TAG (802.1ad) operation for the Receive Diversity
VLAN. The configuration at the switch must match the value of the CMU attribute Rx
Diversity TPID
.
•
Select a dedicated VLAN identifier (VID) for the Receive Diversity VLAN. The
configuration at the switch must match the value of the CMU attribute Rx Diversity
VID.
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 ...