Configuration Guide (Supporting R05.6.00) Manual

178 Multi-Service IronWare QoS and Traffic Management Configuration Guide
53-1003037-02
Hierarchical QoS (HQoS) for 8x10G modules
5
HQoS for PBB traffic
PBB ports can use either BVLAN-based queuing (BVLAN HQoS model, as shown in Figure 11 on
page 177) or I-SID-based queuing as shown in Figure 12, where the egress port is an 802.1ah
(PBB) port and where packets are queued per I-SID.
A BVLAN may carry a large number of services identified by distinct I-SID values. The BVLAN HQoS
model (using HQoS for Local VPLS as shown in Figure 11) differs from the I-SID HQoS model in that
BVLANs represent PBB tunnels that carry traffic from many different services, while the I-SID HQoS
model represent individual services. The B-VLAN HQoS model would is for Backbone Core Bridges,
while the I-SID HQoS model is for Backbone Edge Bridges.
FIGURE 12 PBB HQoS example
10GE 1/1
Level 0
Physical Port
(10GE)
Level 1
Logical Port
(Optional)
L
evel 2
Customer
(Service Group)
(Optional)
Level 3
Service
(I-SID)
Queues
queuing per
<Port, I-SID, priority>
Logical #1
3
2
1
0
3
2
1
0
Scheduler Element
Strict Priority, Weighted
Fair Queuing, Mixed
Rate shaper
Queue
Scheduler Flow
“Other” Queues
7
6
5
4
3
2
1
0
N
C2
NC 1
EF
AF 4
AF 2
AF 1
CS1
BE
2
1
0
40
40
20
10
10
Strict
20 Mb/s





10 Mb/s
10 Mb/s
mixed
 = no limit, no shaping
Logical #n
 Since this is a PBB port, this hierarchy only
accepts queuing per IB-tagged endpoints define by
<B-VID, I-SID> pairs.
Service #1
Service #2
Service #1,
Service #2
B-VIB 300
I-SID 5000
B-VID 200
I-SID 10000
Frames that do not match any
of the congured queues
above (e.g., control trac, IP)
would go here