How Hunt Groups Load Share - Avaya Cajun P882 User Manual

Chapter 4

How Hunt Groups Load Share

Forwarding
Engines and
Fabric Ports
80 Series
Forwarding
Engines
Fabric Ports
4-30
of those 12 ports participates in a hunt group, then that Forwarding
Engine is considered a participating forwarding engine.
Each 80 series Media module has at least two Forwarding Engines,
and as many as eight. These engines are the major hardware
components for bridging and routing data traffic. The Forwarding
Engines can service up to twelve 10/100 Mbps ports. Example, 24-
port 10/100 Mbps 80 series media module has two Forwarding
Engines that service twelve 10/100 Mbps ports each. An eight-port
Gigabit module has eight forwarding engines one for each of the
Gigabit ports per slot. Refer to Table 4-7 for the relationship of
media modules (50 and 80 series) to Forwarding Engines.
The Forwarding Engines are numbered starting at one and increased
by one for each Forwarding Engine. The Supervisor module always
has Forwarding Engines numbered one and two. For a 7-slot P580
switch, numbers one and two for the Supervisor module and up to
eight per media module slot for a maximum total of 50 Forwarding
Engines. For a 17-slot P882, numbers one and two for the
Supervisor module and up to eight for each of the media modules,
for a maximum total of 130. The numbering sequence will vary
depending on the type and total number of media modules. If the
switch has empty slots the numbering sequence is bypassed for the
empty slots.
The P580/P882 has two backplane connections or ports for each
media module. These ports connect the media modules to the
backplane Cross Bar Switch Fabric, which in turn connects all
modules to all other modules and ports. These ports are referred to
as "Switch Fabric Ports". There are two Switch Fabric ports per
media module slot (slots 2 through 7, or slots 2-17) and one fabric
port for the Supervisor slot (slot 1) (Figure 4-18).Each 80 series
media module can use up to two fabric ports in the slot, the number
of Forwarding Engines to fabric ports varies with the media
module.There is anywhere from one to four Forwarding Engines per
fabric port for each 80 series media module (Table 4-7).
The number of Forwarding Engines are distributed among the ports
for 80 series modules. The 80 series 10/100 Mbps media modules
are distributed with 12 10/100 ports for each Forwarding engine.
For example, the 48 port 10/100 media module has four Forwarding
Engines. The first 12 (1-12) ports are on the first Forwarding Engine,
the second 12 (13-24) are on the second Forwarding Engine, which
in turn use one fabric port, the third and fourth grouping of 12 ports
Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, Version 5.3.1