Feature History For Bandwidth Distribution Between Queues; Interfaces Supporting Bandwidth Distribution - Cisco 10000 Series Configuration Manual

Bandwidth Distribution Between Queues
The router can commit up to 99 percent of the interface bandwidth to one or more class queues. If you
attempt to attach a policy map to an interface when the sum of the bandwidth assigned to classes is
greater than 99 percent of the available bandwidth, the router logs a warning message and does not
allocate the requested bandwidth to all of the classes. If the policy map is already attached to other
interfaces, it is removed from them.
Bandwidth includes the Layer 2 header, Layer 2 payload, and two bytes of trailer.
•
•
The router converts the specified bandwidth to the nearest multiple of 1/255 (PRE1) or 1/65535 (PRE2)
of the interface speed. Use the show policy-map interface command to display the actual bandwidth.

Feature History for Bandwidth Distribution Between Queues

Cisco IOS Release
Release 12.0(17)SL
Release 12.2(15)BX
Release 12.2(28)SB
Release 12.2(31)SB2

Interfaces Supporting Bandwidth Distribution

The following describes interface support for bandwidth distribution using the bandwidth command:
Interfaces Supporting the bandwidth Command (Outbound Only)
•
•
•
•
•
•
•
•
* Requires a specific type of hierarchical policy. For more information, see the
QoS for Multiple Policy Levels."
Cisco 10000 Series Router Quality of Service Configuration Guide
5-2
On ATM networks, the bandwidth is cell-based and includes Layer 2 overhead and cell overhead
(for example, cell overhead for SNAP and AAL5, the cell header, the AAL5 trailer, and AAL5
padding).
On Frame Relay networks with link fragmentation and interleaving (LFI) enabled, bandwidth is
based on fragments with Layer 2 overhead included.
Description
This feature was introduced on the PRE1.
This feature was introduced on the PRE2.
This feature was integrated in Cisco IOS
Release 12.2(28)SB for the PRE2.
This feature was introduced on the PRE3. The Distribution
of Remaining Bandwidth Using Ratio feature was also
introduced on the PRE3 only.
Physical
Multilink PPP and Multilink Frame Relay
ATM shaped (peak cell rate is specified) unspecified bit rate (UBR) PVCs and point-to-point
subinterfaces
ATM constant bit rate (CBR) PVCs and point-to-point subinterfaces
ATM variable bit rate (VBR) PVCs and point-to-point subinterfaces
Label-controlled ATM (LC-ATM) subinterfaces *
Frame Relay PVCs, point-to-point subinterfaces, and map classes *
Ethernet VLANs *
Chapter 5 Distributing Bandwidth Between Queues
Required PRE
PRE1
PRE2
PRE2
PRE2
PRE3
Chapter 13, "Defining
OL-7433-09