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
• The working line must be assigned to a lower numbered port than the protection line. For example,
the working line could be on port 3 and the protection line on port 4. If the protection line is on port
2, do not assign the working line to port 3.
• The switches at both ends of the APS lines must be configured for APS, and the role of each line
(working or protection) must be the same at both ends of the line.
To establish redundancy between two lines on the same card, use the following procedure:
Step 1 Establish a configuration session using a user name with GROUP1_GP privileges or higher.
Step 2 If you have not done so already, bring up the working line as described in “Bringing Up Lines,” which
appears earlier in this chapter.
Step 3 Enter the addapsln command as follows:
mgx8830b.2.PXM.a > addapsln <workingIndex> <protectIndex> <archmode>
Replace <workingIndex> with the location of the working line using the format slot.bay.line. For
example, to specify the line on card 2, bay 2, line 1, enter 1.2.1.
Note When specifying the slot number for the working line, always refer to the logical slot number, which is
1 for MGX 8830 switches and 7 for MGX 8850 switches. For example, in the previous paragraph, the
working line is connected to slot 2, bay 2, line 1, but you must enter 1.2.1 to refer to this line.
Replace <protectIndex> with the location of the protection line, using the format slot.bay.line. For
example, to specify the line on card 2, bay 2, line 2, enter 2.2.2.
Note When specifying the slot number for the protection line, always refer to the physical slot number. For
example, in the previous paragraph, the working line is connected to slot 2, bay 2, line 2, so you must
enter 2.2.2 to refer to this line.
Replace <archmode> with the option number that selects the APS architecture mode. Table 3-8 shows
the option numbers and the architecture modes they select.
The following example assigns 1+1 APS redundancy to two lines on the same card:
mgx8830b.2.PXM.a > addapsln 1.2.1 2.2.2 1
Table 3-8 APS Line Architecture Modes
Option Description
1 Selects 1+1 Bellcore GR-253 APS protocol signaling (transmission on both working and
protection lines).
2 Selects 1:1 Bellcore GR-253 APS protocol signaling (transmission on either the working
line or the protection line) for intracard APS.
3 Selects 1+1 ITU-T G.783
1
AnnexB APS protocol signaling (transmission on both
working and protection lines).
1. G.841 has superceded G.783. Cisco MGX switches are in full compliance with G.841 however, as they were with G.783.
4 Selects 1+1 Y-cable signaling without K1 and K2. This option is not supported for
intercard or intracard APS in this release.
5 Selects 1+1 straight cable signaling without K1 and K2.