Avaya Cajun P882 User Manual page 316

Chapter 9
Slow Path
versus Fast Path
How Many
Cache Entries?
9-34
The goal is to maximize Fast Path traffic (L3 Frame Cache Hits) and
minimize Slow Path traffic (L3 Slow Path Frames). The easiest
parameters to monitor are found on the Forwarding Statistics web
page found on the switch Web Agent by selecting the following:
Routing>L3 Forwarding Cache> Forwarding Statistics
The Forwarding Statistics web page shows the breakdown of traffic
by FIRE Fabric port/Chip Index (see below).
Each F-chip/PRE (see Identify the Ports section below for PRE
column explanation) reserves space for IP Unicast, IP multicast, and
IPX. By default, the number of entries are limited to 15,000 for each
(45,000 total). If the CPU attempts to add an entry in excess of
15,000, the L3FE will not be stored and that Flow will only be
forwarded via the Slow Path. When looking at the Active FE
Cache(Cache Contents) page, the Current Entries column
indicates how many entries are currently in the L3F cache. Since the
L3 forwarding cache is recalculated periodically, you need to
monitor the FE Cache web page on the switch Web Agent found by
selecting the following:
Routing>L3 Forwarding Cache>Cache Contents
Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1