Specifications

25-8
Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Software Configuration Guide, Cisco IOS Release 15.1(3)MR
OL-26895-01
Chapter 25 Configuring Quality of Service
Configuring Quality of Service
Shaping Limitations
Table 25-5 summarizes the values that you can use to mark traffic based on interface type. The values
are parameters that you can use with the shape command.
The following limitations also apply to QoS shaping on the Cisco MWR 2941:
• The following limitations apply to input Gigabit Ethernet interfaces:
– You cannot apply shaping to the class-default class unless you are using hierarchical policy
maps and applying shaping to the parent policy map.
– If you are using hierarchical policy maps, you can only apply the class-default class to the
parent policy map.
Sample QoS Configuration
The following configuration demonstrates how to apply QoS given the hardware limitations. The
Cisco MWR 2941 processes traffic between interfaces as follows:
• For layer 2 traffic passing between the GigabitEthernet 0/2 interface and the GigabitEthernet 0/0
interface, the output queue is determined by the QoS Group assigned in the in-qos policy map.
• For layer 3 traffic passing between GigabitEthernet 0/2 interface and the GigabitEthernet 0/0
interface, the output queue is determined based on the CoS value assigned in the in-qos policy map.
(the CoS value is mapped 1:1 to the QoS group value.)
Table 25-4 QoS Rate Limiting Limitations by Interface
GigabitEthernet HWIC-9ESW MLPPP HWIC-1GE-SFP HWIC-ADSL HWIC-SHDSL
Policing with Ingress Egress Ingress Egress Ingress Egress Ingress Egress Ingress Egress Ingress Egress
One rate
One rate and
two actions
Two rates and
two actions
Two rates and
three actions
Table 25-5 QoS Shaping Limitations by Interface
GigabitEthernet HWIC-9ESW MLPPP HWIC-1GE-SFP HWIC-ADSL HWIC-SHDSL
Value Ingress Egress Ingress Egress Ingress Egress Ingress Egress Ingress Egress Ingress Egress
adaptive
average X X
fecn-adapt
max-buffers
peak