Channel bandwidth definition (by a MCAC policy) can be applied under the interface level (group-interface or regular interface):
config>router/service>igmp/mld>interface/grp-if
The following configuration options can lead to the confusion as to which MCAC policy is in effect:
The MCAC policy (channel bandwidth definition) can be applied under two different places (grp-if or regular intf).
The same policy is used for (H)MCAC and HQoS Adjust with redirection enabled or disabled.
The general, the rule is that the MCAC policy under the group-interface is always be in effect in cases where redirection is disabled. This is valid for subscriber or group-interface MCAC, H-MCAC (subscriber and group-interface) and HQoS Adjust in per SAP replication mode.
If redirection is enabled, the MCAC policy under the group-interface is ignored.
If redirection is enabled, but there is no MCAC policy applied under the redirected interface (redirected interface is the interface to which IGMP/MLD Joins are redirected from subscriber hosts), regardless of whether the MCAC policy under the group-interface is applied or not, then:
HQoS adjust has no effect.
MCAC has no effect not only per redirected interface but also per subscriber.