Classification And Marking For Bvi; Policer Granularity And Shaper Granularity; Congestion Management Using Dei - Cisco ASR 9000 Series Configuration Manual

Policer Granularity and Shaper Granularity

Classification and Marking for BVI

The following table indicates the QoS fields that are supported on BVI for classification and marking.
Qos-group
Discard class
Prec (dscp)
vlan
cos
dei
src/ DST MAC
ipv4 L3 fields
ipv6 L3 fields
cos mark via QG
mark/ classify
Policer Granularity and Shaper Granularity
Policer granularity can be configured in the ingress and egress directions. The policer granularity is specified
as a permissible percentage variation between the user-configured policer rate, and the hardware programmed
policer rate.
Note The ASR 9000 Policer implementation supports a granularity of 64 kbps. If you specify a police rate that
is not a multiple of 64, the police rate is rounded off to the next lowest multiple of 64.

Congestion Management Using DEI

You can manage congestion based on the Drop Eligible Indicator (DEI) bit that is present in 802.1ad frames
and 802.1ah frames. Random early detection based on the DEI value is supported on 802.1ad packets for:
• Layer 2 subinterfaces
• Layer 2 main interfaces
• Layer 3 main interfaces
• Ingress and egress
Cisco ASR 9000 Series Aggregation Services Router Modular Quality of Service Configuration Guide, Release
6.1.x
68
Classification
Ingress Egress
yes yes
yes yes
yes yes
no no
no no
no no
yes no
yes yes
yes yes
yes inL2/L3 egress yes in L2/L3 egress
Configuring Modular QoS Congestion Management
Marking
Ingress Egress
yes yes
yes yes
yes yes
NA NA
no no
no no
NA NA
NA NA
NA NA
yes in L2/L3 agress yes in L2/L3 egress