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Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Chapter6 Card and Service Configuration Circuit Emulation Service Module for T3 and E3
addcon. If the application requires NSAP ad dre ssing, use addchan to add the connection and cnfchan
if you need to modify it. Refer to the command reference for the syntax.
On the CESM CLI:
Step 1 Add a connection by executing addcon. (Alt ernatively, you can use addchan if your application requires
the NSAP format of end-poin t s pe cificat ion.) Execute addcon at both ends of the co nn ec tion—unless
the remote end-point is on port 34 of a PXM1 (see the note at the end of this step).
The syntax for addcon is:
addcon <port_num> [mastership [remoteConnId] ]
•port_num is the logical port number and is always 1.
•mastership indicates whether this end - po i nt is th e m a s ter o r s lave 1= mas t er ; 2 =s l ave (def au lt) .
•remoteConnId is the identification for the connection at the sl ave en d . Th e fo r mat is
switchname.slot_number.port_number.vpi.vci. For the MGX-CESM-T3 and MGX-CESM-E3, the
VPI and VCI are typically 0 o r 1.
Note For the channel number, the system always returns the number 32 for the high-speed CESM.
If you execute dspchan, use channel numbe r 3 2 t o s ee de tai ls about the channel (or
dspchans—and no arguments—to see high-level deta ils about the channel). In contrast, the
dspcon command takes the port number 1 to identify the connecti on even th ough it shows
the same information as dspchan.
Step 2 Optionally, you can use cnfcon to modify the connection.
cnfcon <port_num> <CDVT> <CellLossIntegPeriod> <bufsize>
•port_num is the p or t nu m b e r an d is always 1.
•CDVT is a tolerable variation for th e ar rival t ime of cells. For T3, the range is 1 25 –1447
microseconds in 125-microsecond increments. For E3, the range is 125–1884 microseconds in
125-microsecond increments.
•CellLossIntegrPeriod is the amount of time a connection can be in an error condition before an ala rm
is declared. The range is 1000–65535 milliseconds.
•bufsize is the egress buffer size in bytes. You can let the CESM compute the size by entering 0 for
bufsize or enter the number of bytes up to a maximum of 16224.
Step 3 Optionally, you can use cnfswparms on a BPX 8600 series switch to co nfigure connection pa rameters
for the network segment of a three -segment connection. For a stand- alo n e ap p li cat io n, us e whatever
means are supported by the backbon e s wi tches.
cnfswparms <chan_num> <mastership> <vpcflag> <conn_service_type> (=c os)
<route_priority> <max_cost> <restrict_trunk_type> <pcr> <mcr> <pct_util>
•chan_number is the channel (connection) number and is always 32.
•mastership specifies the current end-po in t a s m a s ter o r slave: 1= m ast er ; 2 =s l ave ( de fault ).
•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=vb r; 3 is no t us ed; 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.