%QoS: child policy POLICE-256k already used by another parent policy-map IP-PHONES attached to an interface. Service Policy attachment failed
The above error message display when you attempt to apply "service-policy input SOFTPHONES" on 'VLAN XX2' when "service-policy input IP-PHONES" is in place, vice versa.
1. if you remove service-policy input IP-PHONES from VLAN XX1, then apply service-policy input SOFTPHONES on VLAN XX2 it work fine(voice versa), in short you can't used IP-PHONES & SOFTPHONES POLICY MAPS at a time.
1a. (We're stacking three 3750 Switch),
1b. SW Image: C3750-IPSERVICES-M ;
2. These setup work well with other site.
3750 SWITCH QOS CONFIGURATION.
***********ACCESS CONTROL LISTS***********
ip access-list extended ip-phone-voice
permit udp <enter local site voice vlan ip range here with reverse mask> any range 16384 32767
permit udp any <enter local site voice vlan ip range here with reverse mask> range 16384 32767
ip access-list extended signaling
permit tcp any 1719 1720 any
ip access-list extended softphone-voice
permit udp any range 30000 30099 any
--------Create Class-Maps -----------
class-map match-all IP-PHONE-VOICE
match access-group name ip-phone-voice
class-map match-all SIGNALING
match access-group name signaling
class-map match-all SOFTPHONE-VOICE
match access-group name softphone-voice
class-map match-all ACCESS-PORTS-STACK1
match input-interface FastEthernet1/0/1 - FastEthernet1/0/46
class-map match-all ACCESS-PORTS-STACK2
match input-interface FastEthernet2/0/1 - FastEthernet2/0/43 FastEthernet2/0/45 FastEthernet2/0/47 - FastEthernet2/0/48
class-map match-all ACCESS-PORTS-STACK3
match input-interface FastEthernet3/0/1 - FastEthernet3/0/48
The same policy-map (and QOS configuration) work well with other sites, the only different here is we're stacking three 3750 Switches, while other sites only two switches. I'm not that sure stackwise causes these issue.
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