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Cisco WAN Manager User’s Guide
Version 10.5, Part Number 78-12945-01 Rev. D0, August 2003
Chapter7 Service Class Template Manager Functional Interaction
•MCR: The minimum cell rate for a co nnection using this service type. This value is a percentage of
the PCR. 1000000 is equal to 100%. Range and Units: 0-1000000.
•ICR: Initial Cell Rate. The cell rate used to begi n a transmission on a connection that has b een id le
for a configured period of time. Th is value i s a percentage of the PCR for t he lo g ica l interface.
1000000 is equal to 100%. (Used only on ABR service type connections.) Range and Units:
0-1000000.
•MBS: The maximum number of c ells that may arrive at a rate equal to th e P CR . U s ed fo r po licing.
Range and Units: 1-500000.
•MFS: Max Frame Size. The maxim u m A A L5 f r ame size in cells.
•CDVT: Cell Delay Variation Tolerance for the first leaky bucket.
•Packet Discard Mode: Enables or disables Packet Discard Mode on the connection. Range and units:
1=enabled; 2=disabl e d.
•Maximum Threshold: The VcMax Thre sho ld for C LP (0+1) c ells in mic ro secon ds. Rang e and u ni ts:
0-5000000 microseconds.
•CLP-HIGH: Cell Loss Priority Hi gh Threshold (% of VC QMax) is the hi ghest threshold for the bit
in the header of an ATM cell that ident ifies the cell as eligible for discard within the network under
predefined congestion co ndition s. Mos t often s et by the in gress po lici ng fun ction. Range a nd val ues:
0-1000000.
•CLP-LOW/EPD1: CLP (1) Low or EPDs (1): Cell Loss Priority Low Threshold (% of VC QMax)/
Early Packet Discard. If AAL5 FBTC = yes, th en for the BXM card this is the EPD thresho ld setting.
EPDs is the lowest threshold for the bit in the header of an ATM cell that identifies the cell as eligible
for discard within the network under predefined congestion conditions.
•EPD0: Early Packet Discard Threshold. The maximum threshold for CLP (0+1) cells. This value is
a percentage of the MAX_CELL THRESH for the connection. 1000000 is equal to 100%. Range
and value: 0-1000000.
•EFCI: Explicit Forward Congestion Indication. The VC EFCI discard threshold. This value is a
percentage of MAX_CELL THRESH. 1000000 is equal to m100%. Range and values: 0-1000000.
•CoS Scaling: Class of Service Scaling provides a means of scaling through a set of extended
parameters, which are generally platform specific, based on a set of standard ATM parameters
passed to the VSI slave during connection set up.
•Interface Scaling: Allows the scal in g an d exch an g e o f in for m at io n be tw ee n connections.
•CI Control: Congestion Indicat o r i s a fiel d in an R M -c ell u s ed to c au s e t he so ur ce to d ecr ea se its
ACR (Allowed Cell Rate). The source s ets CI = 0 when it sends an RM cell. C= 1indicats EFCI has
been received on a previous data cell.
•Cut-Off RM Cells: Allows for variations in the RM-cell.
•VSVD: Virtual Source/ Virtual Destination. A VSVD is an ABR connection which may be divided
into two or more separately controlled ABR segments. Each ABR control segment, exce pt the first,
is sourced by a virtual source. S our ces a nd destinations are linked via bi-directional connections,
and each connection terminati on p o in t i s b ot h a s o u rce an d a de s tin at io n , a s our ce fo r da ta th at is
transmitting, and a destination for data that is receiving.
•ADTF: Allowed-cell-rate Decreas e Tim e Fa ct or/I n iti al -cell-rate Time-out. The time bet w een R M
cells before the allowable cell rate returns to the initial cell rate.
•RDF: Rate Decrease Factor: An AB R ser v ice parameter that controls the d ecr ea s e i n cel l
transmission rate.