Goldweb GP-L200N User Manual - 8   About Powerline Qos

GP-L200N User Manual                                                                                     

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8   About PowerLine QoS 

The GP-L200N allows for 4 levels of Channel Access Priority (CAP (0 – 3)). The 8 

levels of VLAN Ethernet tags must be mapped to the 4 levels of CAP priority, where 

CAP 3 is the highest priority and CAP 0 is the lowest. CAP 3 priority might be used 

for voice and network management frames, CAP 2 is used for streaming video and 

music while CAP 1 and CAP 0 are used for data. 

Default CAP 

The ‘Default CAP’ group allows for default priority mapping of packets that do not 

have a VLAN TAG. Settings are available for Unicast (directed to a host). 

IGMP - (default CAP 3) - sets the channel access priority for IGMP frames - 

these are the group management frames, not the stream data 

Unicast - (default CAP 1) - sets the default channel access priority for unicast 

frames not matching any other classification or mapping. 

IGMP managed Multicast Stream (Fixed to CAP 2) - sets the default channel 

access priority for stream data belonging to a snooped IGMP multicast 

group. 

Multicast/Broadcast - sets the default CAP for multicast frames not in a 

snooped group and for broadcast frames. 

The following are the factory default settings for VLAN Tags and TOS Bits: 

VLAN Tag 

User Priority 

Default CAP Priority

TOS Bit User 

Priority 

Default CAP Priority

0 CAP1 

0 CAP1 

1 CAP0 

1 CAP0 

2 CAP0 

2 CAP0 

3 CAP1 

3 CAP1 

4 CAP2 

4 CAP2 

5 CAP2 

5 CAP2 

6 CAP3 

6 CAP3 

7 CAP3 

7 CAP3