Cisco ONS 15454 Troubleshooting Manual page 91

Chapter 1 General Troubleshooting
Table 1-29 Circuit Creation Error with VT1.5 Circuit
Possible Problem
You might have run out
of bandwidth on the VT
cross-connect matrix at
the ONS 15454
indicated in the error
message.
1.9.4 Unable to Create Circuit From DS-3 Card to DS3XM-6 Card
Symptom
Table 1-30
Table 1-30 Unable to Create Circuit from DS-3 Card to DS3XM-6 Card
Possible Problem
A DS-3 card and a
DS3XM-6 card have
different functions.
1.9.5 DS-3 Card Does Not Report AIS-P From External Equipment
Symptom
external equipment/line side.
Table 1-31 on page 1-91
Table 1-31 DS3 Card Does Not Report AIS-P From External Equipment
Possible Problem
The card is functioning
as designed.
November 2004
Solution
The matrix has a maximum capacity of 336 bidirectional VT1.5
cross-connects. Certain configurations exhaust VT capacity with less than
336 bidirectional VT1.5s in a BLSR or less than 224 bidirectional VT1.5s in
a path protection or 1+1 protection group. Refer to the Cisco ONS 15454
Reference Guide for more information.
You cannot create a circuit from a DS-3 card to a DS3XM-6 card.
describes the possible problem and the solution.
Solution
A DS3XM-6 card converts each of its six DS-3 interfaces into 28 DS-1s for
cross-connection through the network. Thus, you can create a circuit from a
DS3XM-6 card to a DS-1 card, but not from a DS3XM-6 card to a DS-3 card.
These differences are evident in the STS path overhead. The DS-3 card uses
asynchronous mapping for DS-3, which is indicated by the C2 byte in the
STS path overhead that has a hex code of 04. A DS3XM-6 has a VT payload
with a C2 hex value of 02.
You can find instructions for creating circuits in the
Note
Cisco ONS 15454 Procedure Guide.
A DS3-12, DS3N-12, DS3-12E, or DS3N-12E card does not report STS AIS-P from the
describes the possible problem and the solution.
Solution
This card terminates the port signal at the backplane so STS AIS-P is not
reported from the external equipment/line side.
DS3-12, DS3N-12, DS3-12E, and DS3N-12E cards have DS3 header
monitoring functionality, which allows you to view performance monitoring
(PM) on the DS3 path. Nevertheless, you cannot view AIS-P on the STS
path. For more information about the PM capabilities of the DS3-12,
DS3N-12, DS3-12E or DS3N-12E cards, refer to the Cisco ONS 15454
Reference Manual.
1.9.4 Unable to Create Circuit From DS-3 Card to DS3XM-6 Card
Cisco ONS 15454 Troubleshooting Guide, R4.6
1-91