Quality of Service Guide QoS and QoS Policies
Edition: 01 3HE 11014 AAAC TQZZA 91
Figure 20 illustrates the functionality of fabric shapers in aggregate mode. Once the
policing, classification, queuing and per-destination based priority queuing takes
place, as described in previous sections in this chapter, the aggregate mode adapter
card shapers take effect. In aggregate mode, the aggregate of all the access ingress
and network ingress traffic is shaped at a user-configured rate regardless of the
destination adapter card.
Figure 20 Fabric Shapers in Aggregate Mode
Mixing different fabric shaper modes within the same chassis and on the same
adapter card is not recommended; however, it is supported. As an example, an
8-port Gigabit Ethernet Adapter card in a 7705 SAR-18 can be configured for
aggregate mode for access ingress and for per-destination mode for network
ingress. The same chassis can also contain an adapter card (for example, the 8-port
Ethernet Adapter card) that is configured for per-destination mode for all traffic. This
setup is shown in the following example.
MDA Access Fabric Mode Network Profile Mode
1/1 a8-ethv2 Destination Destination
1/2 a8-1gb-sfp Aggregate Destination
1/3 a4-oc3 Destination Destination
1/4 a32-chds1v2 Destination Destination
1/X1 x-10GigE Aggregate Destination
Adapter Card 1
Destination adapter
card 1
20175
CoS-X
Exp
Out-Prof
BE
In-Prof
Strict
Exp
In-Prof
BE
Out-Prof
Exp
Out-Prof
BE
In-Prof
Strict
Exp
In-Prof
BE
Out-Prof
Per Forwarding
Class Queuing
Per Destination Priority
Based Scheduling
To Fabric
Aggregate Shapers
Round Robin
Legend:
CoS-8
CIR
All access ingress
and network
ingress traffic
CIR
PIR
PIR
CIR
CoS-1
PIR
Destination adapter
card 2
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