CANOGA PERKINS 9145ELB NID Software Version 4.01 - Manual (Page 138)

9145ELB NID Software User’s Manual Bandwidth Profiles
Shapers
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• A User Port - If a policer is associated with a User Port, no other policers (service
multiplexing level or CoS flow level policers) can be enabled on that port. For
more information, see the section “Port Filters screen” on page 62.
• A service multiplexing record
• A CoS flow, identified by a service multiplexing value and a PCP value. When
policing is performed per EVC/CoS, all PCP values not associated with a policer
are not policed and are therefore filtered.
• an administrative state of the policer, which allows you to enable and disable traffic polic-
ing, without the need to re-provision the policer.
A policer classifies ingress frames as green, yellow or dropped (that is, frames it decides to drops
because they exceed the contract). Yellow frames are indicated by the DE bit set in the outer tag
on the egress (NET) port. If the frames are double tagged according to the service multiplexing
configuration, then the DE bit is replicated in the outer (S) and tunnel (T) tag.
The CFI bit in the ingress C-Tagged frames remain unchanged and is not copied to the egress
outer tag.
A Service Multiplexing record associated with a policer, either at SM level or at the CoS flow
level, cannot be deleted as long as the policer is still configured.
For steps for configuring port-level policing, see the section “Port Filters screen” on page 62.
11.3 Shapers
The shapers have been implemented as double-rate token bucket shapers. Figure 11-2
illustrates the queuing and transmission scheduling entities and parameters.
Figure 11-2 Shaping Entities