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Chapter 25
Configuring SONET Automatic Protection System
Test Loops
The test commands addlnloclp and addlnrmtlp may affect service even when APS is configured. In all
APS configurations, if the working line is looped, both lines are looped and traffic disrupted.
Notes on APS Messages
When adding an APS 1+1 line or trunk by using addapsln, if the working slot's paired redundant slot is
not a legal protection slot, or if firmware cannot determine what the paired slot is, an invalid slot pairing
exists and one of the following two messages are displayed:
Protection card specified by user does not match HW.
Working card specified by user does not match HW.
You can display the redundant card information by using the dspcd command under the "Backcard
Installed" heading. For example, if a redundant pair is configured with a primary slot of 2 and a
secondary slot of 3, the dspcd 2 command displays
RedSlot: 2
The following is an example of dspcd 2:
swwye
Detailed Card Display for BXM-155 in slot 2
Status:
Revision:
Serial Number
Fab Number
Queue Size
Support: 4 Pts, OC-3, FST,
Support: VT, ChStLv 2, VSIlvl 2
Support: APS (FW, HW1+1)
Support: OAMLp, TrfcGen
#Ch: 8128, PG[1] :8123
#Sched_Ch:16284
Last Command: dspcd 2
APS K1 Command Precedence
The possible conditions which may cause/prevent a switch are listed in Table 25-6. The list is arranged
starting from highest precedence and ending with lowest precedence. For further description and
information, refer to the Cisco WAN Switching Command Reference.
Table 25-6 K1 Switching Conditions
APS K1 Command Precedence
Lock out of Protection
Forced Switch
Signal Fail
Signal Degrade
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
.
TN
silves
Active
DDA
652774
28-2158-02
228300
VcShp
, and the dspcd 3 command displays
RedSlot: 3
BPX8620
9.3 March 9
Backcard Installed
Type:
LM-BXM
Revision
EW
Serial Number
1..1...
Supp: 4 Pts, OC-3, SMF, RedSlot:3
Cisco BPX 8600 Series Installation and Configuration
Test Loops
2000
25-13
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Troubleshooting
