Cisco Systems MGX 8230 manual Release 1.1.31, Part Number 78-11215-03 Rev. B0, May

Chapter 6 Card and Service Configuration

Eight-Port Circuit Emulation Service Modules

•cond_signalling is the string of condition signaling bits that you specify with a decimal number in the range 0–15, where, for example, 15=1111, and 0=0000. These bits represent the ABCD signalling to the line or network when an underflow occurs.

•mastership indicates whether this end-point is the master or slave; 1=master; 2=slave (default).

•remoteConnId is the identification for the connection at the slave end. The format is switchname.slot_number.port_number.vpi.vci.

Step 2 Optionally, you can use cnfcon to modify an individual connection. This command requires a channel number. If you add a connection by using addcon, you do not need to specify a channel number because the system automatically uses the next available number. To obtain the channel number for cnfcon, execute dspcons.

cnfcon <port_num> <CDVT> <CLIP> <bufsize> <cbrclkmode> <isenable> <exttrigis>

•port_num is the port number.

•CDVT is a tolerable variation for the arrival time of cells. For T1, the range is 125–24000 microseconds. For E1, the range is 125–26000 microseconds. Both require 125-microsecond increments.

•CLIP is CellLossIntegrationPeriod, an amount of time a connection can be in an error condition before an alarm is declared. The range is 1000-65535 milliseconds.

•bufsize is the egress buffer size in bytes. These buffers are used for tolerating variations in the cell delay. The size can be automatically computed, or you can enter a specific size in bytes.

•cbrclkmode is the clock mode for a circuit emulation connection. The values are 1–3:1 is synchronous; 2 is SRT. 3 is adaptive; SRT and adaptive are asynchronous clocking schemes.

•isenable is a flag to enable the idle code (ABCD signalling bits)–based cell suppression feature on a connection. If you enable this feature, idle suppression logic is activated so that suppression begins when valid idle ABCD bits are detected. This feature is valid for only single DS0 connections.

Possible values are 1 to enable and 2 to disable.

•exttrigis is an enable for an external idle suppression trigger. With this feature enabled, the logic forcefully suppresses cells on a single DS0 connection. Enter a 1 to disable idle suppression or a 2 to enable idle suppression.

Step 3 Optionally, you can configure connection parameters for the network segment of a three-segment connection:

cnfswparms <chan_num> <mastership> <vpcflag> <conn_service_type> (=cos) <route_priority> <max_cost> <restrict_trunk_type> <pcr> <mcr> <pct_util>

•chan_number is the connection in the range 32–279.

•mastership specifies the current end-point as master or slave; 1=master; 2=slave (default.

•vpcflag indicates whether the connection is a VPC or a VCC: 1=VPC; and 2=VCC.

•conn_service_type selects the type of service for the connection: 1=cbr; 2=vbr; 3 is not used; 4=ubr; 5=atfr; 6=abrstd; and 7=abrfst.

•route_priority is the priority of the connection for rerouting. The range is 1–15 and is meaningful only in relation to the priority of other connections.

•max_cost is a number establishing the maximum cost of the connection route. The range is 1–255 and is meaningful only in relation to the cost of other connections.

•restrict_trunk_type is a number that specifies the type of trunk this connection can traverse. The numbers are 1 for no restriction, 2 for terrestrial trunk only, and 3 for satellite trunk only.

•pcr is the peak cell rate.

	Cisco MGX 8230 Edge Concentrator Installation and Configuration
6-48	Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001