Cisco Systems OL-7396-01 Manual De Usuario
9-11
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 9
Configuring Resource Management
Configuring Global Resource Management
PVC Connection Traffic Rows
The CTT in a permanent virtual channel (PVC) setup requires storing PVC traffic values in a CTT data
structure. Rows used for PVCs are called stable rows, and contain traffic parameters.
structure. Rows used for PVCs are called stable rows, and contain traffic parameters.
SVC Connection Traffic Rows
The CTT in a switched virtual channel (SVC) setup provides a row identifier that Simple Network
Management Protocol (SNMP) or the user interface can use to read or display SVC traffic parameters.
A CTT row index is stored in the connection-leg data structure for each flow of the connection.
Management Protocol (SNMP) or the user interface can use to read or display SVC traffic parameters.
A CTT row index is stored in the connection-leg data structure for each flow of the connection.
Note
Rows cannot be deleted while in use by a connection.
CTT Row Allocations and Defaults
To make CTT management software more efficient, the CTT row-index space is split into rows allocated
as a result of signalling and rows allocated from the command-line interface (CLI) and SNMP.
as a result of signalling and rows allocated from the command-line interface (CLI) and SNMP.
describes the row-index range for both.
describes the well-known, predefined ATM CTT rows.
Table 9-5
CTT Row-Index Allocation
Allocated by
Row-index range
ATOMMIB Traffic Descriptor Table or CLI
connection-traffic-table-row creation
connection-traffic-table-row creation
1 through 1,073,741,823
Signalling VxL creation
1,073,741,824 through 2,147,483,647
Table 9-6
Default ATM Connection Traffic Table Rows
CTT Row
Index
Index
Service
Category
Category
Peak-Cell-Rate
(clp01)
(clp01)
Sustained-
Cell-Rate
(clp01)
Cell-Rate
(clp01)
Tolerance
Use
1
UBR
7,113,539
—
None
Default PVP/PVC row
index
index
2
CBR
424 kbps
—
None
CBR tunnel well-known
(WK) VCs
(WK) VCs
3
VBR-RT
424 kbps
424 kbps
50
Physical
interface/VBR-RT WK
VCs
interface/VBR-RT WK
VCs
4
VBR-NRT 424 kbps
424 kbps
50
VBR-NRT tunnel WK VCs
5
ABR
424 kbps
—
None
—
6
UBR
424 kbps
—
None
UBR tunnel WK VCs