Qos Accounting - Cisco ASR 9000 Series Configuration Manual

Deploying the Quality of Service (QoS)
shape average 100000 kbps
!
end-policy-map
!
//Modifying Service Policy through CoA
qos-policy-out=remove-class(sub, (class-default, voip))
qos-policy-out=add-class(sub, (class-default, video), bw-rpct(50), pri-level(2))
qos-policy-out=add-class(sub, (class-default, data), shape(400),set-ip-prec(1))
//Policy-map configuration after CoA looks like:
policy-map __sub_ffffffec1a37f_child1
class video
priority level 2
bandwidth percent 50
police rate 10000 kbps burst 16 kbytes
!
!
class data
shape average 400 kbps
set precedence 1
!
class class-default
!
end-policy-map
!
policy-map __sub_ffffffec1a37f
class class-default
service-policy __sub_ffffffec1a37f_child1
shape average 100000 kbps
!
end-policy-map
!

QoS Accounting

The QoS overhead accounting feature enables BNG to account for various encapsulation types when applying
QoS to packets. The ATM overhead accounting enables the BNG to account for the ATM encapsulation on
the subscriber line. It also accounts for the overhead added by cell segmentation. This accounting enables the
service provider to prevent overruns on the subscriber line and ensures that the BNG executes QoS features
on the actual bandwidth allocated to the subscriber traffic. The ATM overhead encapsulation details are listed
in this table.
Table 4: ATM Overhead Encapsulation Details
DSLAM to CPE
Encapsulation
CLI Option
snap-pppoa
mux-pppoa
snap-1483routed
mux-1483routed
OL-28375-03
Overhead (in bytes)
12
10
18
8
Cisco ASR 9000 Series Aggregation Services Router Broadband Network Gateway Configuration Guide, Release
ALE Tags (RFC 4679)
Data Link Encapsulation1
AAL5 N/A
AAL5 N/A
AAL5 Untagged Ethernet
AAL5 Untagged Ethernet
QoS Accounting
Encapsulation2
PPPoA LLC (1)
PPPoA Null (2)
IPoA LLC (3)
IPoA NULL (4)
4.3.x
191