Cambium Networks PTP 820 Series, User Manual, Page: 116 / 1149

Chapter 2: Getting Started Configuring Unit Redundancy for the PTP 820G
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Note
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The external switch must support LACP. PTP 820G supports LACP for purposes of line protection
only. PTP 820G supports a special LACP implementation for purposes of line protection only. This
LACP implementation is configured on the logical interface level, as described in
Configuring
Ethernet Interface Protection . Regular LACP is configured as part of the LAG configuration, and is
not supported with unit redundancy. See Configuring Link Aggregation (LAG) .
•
Optical Splitter Mode – An optical splitter cable is used to connect both the active and the standby Ethernet
ports. Optical Splitter mode can be used with optical Ethernet interfaces only.
•
Electrical Splitter Mode – A Y-cable is used to connect to both the active and the standby Ethernet ports. With
Electrical Splitter mode, interface protection is only supported for speeds up to 100 Mbps (Fast Ethernet).
Electrical Splitter Mode can be used with electrical Ethernet interfaces only.
Note
When using the Y-cable with Electrical Splitter mode and Auto Negotiation enabled, there is a traffic
disruption of approximately two seconds upon switchover for Ethernet traffic passing through this
cable.
PTP 820G unit redundancy can be used with the following radio configurations:
•
2 x 1+0 – PTP 820G unit with a 1+0 configuration protecting another PTP 820G unit with a 1+0 configuration.
•
2 x 2+0 – PTP 820G unit with a 2+0 configuration protecting another PTP 820G unit with a 2+0 configuration.
To configure 2 x 2+0 protection, simply configure the two radios according to your network requirements, then
configure unit redundancy according to the instructions in this section.
To configure unit redundancy, you must perform the following steps:
1. Verify that the proper cables for unit redundancy are connected to the units. See Cabling Requirements
for Unit Redundancy .
2. Configure Ethernet interface protection. See Configuring Ethernet Interface Protection .
3. Enable unit redundancy. See Enabling Unit .
The Unit ACT LED on each unit indicates whether the unit is Active (Green) or Standby (Orange). See Unit/ACT LED .
Configuring Unit Redundancy
Before configuring unit redundancy, verify that both units have the same hardware part number (see Displaying
Unit Inventory) and the same software version (see Viewing Current Software Versions ). If the units do not have
the same software version, upgrade each unit to the most recent software release.
To configure unit redundancy, you must perform the following steps:
o
Verify that the PC or laptop being used to configure the devices is directly connected
to the management port of the unit that will be the active unit.