System information

1. System Concepts
4821-A2-GB21-00 July 2004
1-5
1:1 (Lowest Priority Group)
Queue 4 (High)
Queue 3
Queue 2
Queue 1 (Low)
d
spv
d
spv
Select
Packets
2
1
Frames to be
transmitted are
assigned to a PG
based on VLAN ID.
The DSL port PG is
made a member of
the VLAN by using
the
port-id:pg form
in the VLAN
configuration.
1
1:2
1:3
1:4
1:5
1:6
1:7
1:8 (Highest Priority Group)
VLAN 1
Frames are queued
in each PG
based on the IEEE
802.1p priority
field or FIFO
(configurable per
PG).
2
3
Frames are
selected from the
PG output queues
for transmission.
Frames will be
untagged before
forwarding if the PG
is an Untagged
Member of the
VLAN.
3
4
Output VC (Cell)
Scheduling: All VCs
are AAL5 Strict Priority
PG 8 Queue 4 (High)
to PG 1 Queue 1
(Low).
4
Voice
Video 1
Video 2
Video 3
Video 4
PPPoE
Bridged
VC
Default
Data
VC 0/40
VC 1/33
VC 1/34
VC 1/35
VC 1/36
VC 0/62
VC 0/32
VC 0/35
Priority Group (PG)
VLAN - VC Downstream Flow Example
DSL Port 1
03-17461