Special Case: 1 + 1 Ethernet Redundancy
Chapter 13
FA4800 User Manual
Release 1.9.30
13-6
A ring node is built from two ODUs from adjacent links. The ODUs can be
connected to either an IDU or to a PoE device as in
Figure 13-2
. Port
names in the IDU are shown.
Figure 13-2: Node with IDU and PoE device
The switching function is carried out by the IDU-Cs and IDU-Es, both of
which provide Layer 2 support (see
Chapter 15
).
Special Case: 1 + 1 Ethernet Redundancy
The same device may be used to provide economic 1 +1 redundancy for a
single link.
A 1+1 Ethernet is a ring with two nodes. One of the links is RPL.
The equipment in a 1+1 Ethernet installation is as follows:
Figure 13-3: 1+1 Ethernet
Note
Connect the switch at the site only to one IDU.
