Specifications

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Cisco MGX 8800/8900 Series Software Configuration Guide
Release 5.1, Part Number OL-6482-01, Rev. A0, January 25, 2005
Chapter 3 Provisioning PXM1E Communication Links
General PXM1E Configuration Procedures
Step 3 To display the configuration of a single line, enter the following command:
mgx8830b.2.PXM.a > dspln -type <bay.line>
Table 3-3 describes the dspln command parameters. The line configuration appears as follows:
mgx8830b.2.PXM.a > dspln -sonet 2.1
Line Number : 2.1
Admin Status : Up Alarm Status : Clear
Loopback : NoLoop APS enabled : Enable
Frame Scrambling : Enable Number of ports : 1
Xmt Clock source : localTiming Number of partitions: 1
Line Type : sonetSts3c Number of SPVC : 0
Medium Type(SONET/SDH) : SONET Number of SPVP : 0
Medium Time Elapsed : 80 Number of SVC : 0
Medium Valid Intervals : 73
Medium Line Type : ShortSMF
Configuring Inverse Multiplexing for ATM
The Inverse Multiplexing for ATM (IMA) feature enables multiple T1 or E1 lines to be grouped into a
single high-speed ATM port. The advantage of the IMA feature is that you do not need T3/E3 circuits to
support high bandwidth on your switch.
On MGX 8850 (PXM1E) and MGX 8830 switches, IMA is supported on the PXM1E-16-T1E1,
AUSM-8-T1E1/B, and MPSM cards. On MGX 8850 (PXM45) switches, IMA is supported on
AXSM-32-T1-E, AXSM-32-E1-E, and MPSM cards. IMA is not supported on MGX 8950 switches.
Note The procedures in this chapter apply only to the PXM1E card. To configure IMA on AUSM/B cards,
refer to the Cisco ATM Services (AUSM/MPSM) Configuration Guide and Command Reference for MGX
Switches, Release 5.1. To configure IMA on AXSM-32-T1E1-E cards, refer to the Cisco ATM Services
(AXSM) Configuration Guide and Command Reference for MGX Switches, Release 5.
A single IMA group can support up to 16 T1 or E1 links, as follows
• Each T1 IMA link supports up to 1.5 Mbps, for a total of 24 Mbps per back card.
• Each E1 IMA link supports up to 2 Mbps, for a total of 32 Mbps per back card.
• If IMA is disabled on the PXM1E-16-T1E1, each T1 or E1 interface can be configured as a single
port running at full line rate.
Table 3-3 dspln Command Parameters
Parameter Description
type The parameter specifies the type of line that is connected to the switch. Replace
<type> with -ds1, -e1, -ds3, -e3, or -sonet. Use the dsplns command to view the
configured line type in the Line Type column.
bay Replace <bay> with 2 to indicate that the line is connected to a PXM1E back card in
the lower bay.
line Replace <line> with the number that corresponds to the line for which you want to
display information.