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Appendix K Router Platform User Interface Reference
PVC Policy Page
K-66
User Guide for Cisco Security Manager 3.2
OL-16066-01
UBR The following field is displayed when UBR is selected as the Bit Rate:
• PCR—The peak cell rate for output in kilobits per second (kbps). Cells
in excess of the PCR may be discarded.
UBR+ The following fields are displayed when UBR+ is selected as the Bit Rate:
• PCR—The peak cell rate for output in kilobits per second (kbps). Cells
in excess of the PCR may be discarded.
• MCR—The minimum guaranteed cell rate for output in kilobits per
second (kbps). Traffic is always allowed to be sent at this rate.
Note UBR+ requires Cisco IOS Software Release 12.4(2)XA or later, or
version 12.4(6)T or later.
VBR-NRT The following fields are displayed when VBR-NRT is selected as the Bit
Rate:
• PCR—The peak cell rate for output in kilobits per second (kbps). Cells
in excess of the PCR may be discarded.
• SCR—The sustained cell rate for output in kilobits per second (kbps).
This value, which must be lower than or equal to the PCR, represents the
maximum rate at which cells can be transmitted without incurring data
loss.
• MBS—The maximum burst cell size for output. This value represents
the number of cells that can be transmitted above the SCR but below the
PCR without penalty.
VBR-RT The following fields are displayed when VBR-RT is selected as the Bit Rate:
• Peak Rate—The peak information rate for realtime traffic in kilobits per
second (kbps).
• Average Rate—The average information rate for realtime traffic in
kilobits per second (kbps). This value must be lower than or equal to the
peak rate.
• Burst—The burst size for realtime traffic, in number of cells. Configure
this value if the PVC carries bursty traffic.
These values configure traffic shaping between realtime traffic (such as
voice and video) and data traffic to ensure that the carrier does not discard
realtime traffic, for example, voice calls.
Table K-27 PVC Dialog Box—QoS Tab (Continued)