One of the key
features of the 1572 access point (AP) is the ability to “daisy chain” APs
while they are operating as Mesh APs (MAPs). By “daisy chaining” MAPs,
customers can either operate the APs as a serial backhaul, allowing different
channels for uplink and downlink access thus improving backhaul bandwidth, or
to extend universal access. Extending universal access allows a customer to
connect a local mode or flexconnect mode 1572 AP to the Ethernet port of a MAP,
thus extending the network to provide better client access. These features are
explained in detail in the following sections.
In the 8.0MR release,
when the 1572 is configured as a Master AP, the following APs are supported as
points need to be cabled differently depending on the AP type of their
terminating Slave AP.
If both the Master AP
and Slave APs are 1572s, there should be an Ethernet cable from the Master AP’s
Ethernet port to the Slave AP’s Ethernet port. Daisy chaining should be enabled
on both APs.
If the Master AP is a
1570 and the Slave AP is a 1532 or 3700P, the Ethernet cable connects the
PoE-Out port of the Master AP to the PoE-In port of the Slave AP.
If the Master AP is a
1570 and the Slave AP is a 1520 or 1550, the Ethernet cable connects the 1572's
Ethernet port to any Ethernet port on the 1552.
Daisy-chaining feature can be used to provide a serial-backhaul mesh. The
Master MAP has a preferred parent selected as the RAP. The slave AP has no
preferred parent selected, but is physically connect to the Master AP.
High gain directional
antenna should be used in typical serial-backhaul deployments. In addition
“Preferred Parent” configurations should be used to create serial-backhaul mesh
The child AP selects
the preferred parent based on the following conditions:
is the best parent.
has a link SNR of at least 20 dB.
has a link SNR in the range 12 dB and 20 dB, but no other parent is
significantly better (SNR more than 20% is better). For SNR lower than 12 dB,
the configuration is ignored.
is not blacklisted.
is not in silent mode because of dynamic frequency selection (DFS).
is in the same bridge group name (BGN). If the configured preferred parent is
not in the same BGN, and no other parent is available, the child will join the
parent AP using the default BGN.