17-7
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 17 Configuring Dynamic Subscriber Services
Applying Traffic Shaping Parameters Using RADIUS Profiles
Accounting Updates
When dynamic bandwidth selection applies QoS values for a user, it sends an accounting record to the
RADIUS server. The accounting records contain accounting attributes such as the following:
Cisco-Avpair = “peak-cell-rate=155000” [flags = 0x00014000]
Cisco-Avpair = “sustainable-cell-rate=145000” [flags = 0x00014000]
Service Category Transitions
Table 17-1 lists the service category transitions supported on the Cisco 10000 series router for dynamic
bandwidth selection (DBS).
In DBS, the router does not allow you to change a VC traffic class, regardless of the atm pxf queuing
mode of the router. For example, if you have a shaped UBR and DBS downloads peak cell rate (PCR)
and sustained cell rate (SCR) values from RADIUS, the router does not convert the VC to VBR-nrt.
Instead, the VC remains shaped UBR with the PCR configured. The router accepts or rejects the session
on the VC as described below:
• If the downloaded PCR and SCR parameters are defined as mandatory attributes in RADIUS, the
router rejects the session.
• If the downloaded PCR and SCR parameters are defined as non-mandatory attributes in RADIUS,
the router accepts the session on the VC without changing the VC’s traffic class or parameters.
Dynamic Bandwidth Selection and Oversubscription
In releases prior to Cisco IOS Release 12.3(7)XI2, if you simultaneously configure dynamic bandwidth
selection (DBS) and VC oversubscription, RADIUS-provided QoS parameters are not set for some ATM
VCs.
In Cisco IOS Release 12.3(7)XI2 and later releases, the router supports VC oversubscription on VCs that
are modified using DBS. You can simultaneously configure DBS and VC oversubscription without any
adverse affect on the VC’s rate modification.
Ta b l e 17-1 Supported Service Category Transitions
From Service Category To Service Category Transition
Any UBR-unshaped Reject
UBR-unshaped Any Reject
UBR-PCR (shaped) VBR-nrt Reject
VBR-nrt UBR-PCR Reject
UBR-PCR UBR-PCR Accept
VBR-nrt VBR-nrt Accept
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