Rm Cac Support - Cisco Catalyst 8540 MSR Configuration Manual

CTT Row
Table 16-7
Table 16-7 Region Thresholds for Threshold Groups
Region
0
1
2
3
4
5
6
7
For more information about threshold groups and configuration parameters, see
Resource Management,"
CTT Row
A row in the connection traffic table (CTT) is created for each unique combination of traffic parameters.
When a TVC is set up in response to a request by tag switching, a CTT row is obtained from the resource
manager by passing the traffic parameters that include the service category (TBR_x [WRR_x], where x
is 1, 2, 3, or 4). If a match is found for the same set of traffic parameters, the row index is returned;
otherwise a new table is created and the row index of that CTT row is returned. Since all data TVCs use
the same traffic parameters, the same CTT row can be used for all TVCs of a particular service category
once it is created.
There are no user configurable parameters for the CTT with TVCs.
Note

RM CAC Support

Connection admission control (CAC) is not supported for tag virtual channels (TVCs). All TVCs are best
effort connections; therefore, no bandwidth is guaranteed by the RS. Only the WRR scheduler is used.
So, all of the traffic parameters (PCR, MCR, MBS, CDVT, and SCR) are unspecified. There is no best
effort limit like there is with ATM Forum UBR and ABR connections. CAC is bypassed for TVCs.
ATM Switch Router Software Configuration Guide
16-18
gives the eight thresholds for threshold groups 6, 7, 8, and 9.
Lower Upper Queue
Limit Limit Limit
0 8191 511
8128 16,383 255
16,320 24,575 127
24,512 32,767 63
32,704 40,959 31
40,896 49,151 31
49,088 57,343 31
57,280 65,535 31
and the Guide to ATM Technology.
Chapter 16 Configuring Tag Switching and MPLS
Marking Discard
Threshold Threshold
127 447
63 223
31 111
15 63
15 31
15 31
15 31
15 31
Chapter 9, "Configuring
OL-7396-01