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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 6 Card and Service Configuration
Processor Switching Module
Step 6 On a stand-alone node, specify the cell header type as needed by entering the cnfatmln command.
cnfatmln <line_num> <type>
• line_num is the line number in the range 1–4.
UNI cell headers typically apply where a workstation connects through a line to a PXM1 UNI port
(rather than a SLIP-based port on the PXM1-UI card). Such an implementation is not common, so
entering cnfatmln is not necessary.
Automatic Protection Switching on the PXM1
Automatic Protection Switching (APS) provides redundancy for an OC-3 or OC-12 line on the PXM1
(if a failure occurs someplace other than the PXM1 front card). The failure can originate on the daughter
card, uplink card, or any part of the physical line.
With APS, the active PXM1 remains active and passes the cells from the failed line-path through the
redundant line. The advantage of APS is that a line switchover requires significantly less time than a full
PXM1 switchover.
Note A failure of the PXM1 front card in a redundant system causes the entire PXM1 card set to switch
over.
port_no Logical port number in the range 1–32 for user-connections or 34 for inband ATM
PVCs for network management
controller String identifying the network controller—PAR, PNNI, or TAG
ingress_%BW Percentage of ingress bandwidth in the range 0–100
egress_%BW Percentage of egress bandwidth in the range 0–100
min_VPI Minimum VPI in the range 0–4095
max_VPI Maximum VPI in the range 0–4095
min_VCI Minimum VCI in the range 0–65535
max_VCI Maximum VCI in the range 0–65535
max_GLCNs Maximum GLCNS in the range 0–32767
line_numer_Id Line number in the range 1–4
type ATM interface type: 2 for UNI or 3 for NNI (the default)