Nortel business policy switch 2000, User Manual

Page: 300 / 412

300 Chapter 4 Policy-enabled networks
208700-C
You cannot change the characteristics of these queue sets (such as the service
discipline, packet or buffer thresholds, and queue weights for WRR scheduler).
Interface groups
Every port should be assigned to an interface group, which is used to apply
policies to traffic received by this port. And, each port can belong to only
one
interface group. The Web-based interface for Advanced QoS uses the term
“Interface Configurations” for this function. One policy references only one
interface group, but you can configure several policies to reference the same
interface group.
All ports that have the same interface group (role combination) have the same set
of filters installed on them. When you move a port to another interface group (role
combination), the filters associated with the previous interface group are removed
and the filters
associated with the new interface group are installed on the port.
When the power is turned on, ports are assigned to the default interface group
(role combination), which is named allBPSIfcs. When you a filter you must create
or specify an interface group. So, ports that are not assigned to an interface group
and are detected on initialization are assigned to the default interface group named
allBPSIfcs.
Note: If you assign a port that is part of a MultiLink Trunk (MLT) to an
interface group, only that group joins the interface group. The other ports
in the MLT do
not become part of the interface group (role combination)
automatically.
Note:
You must remove all ports from an interface group in order to
delete it.You cannot delete an interface group that is referenced by a
policy.