Cisco ONS 15454 Troubleshooting Manual page 181

Chapter 1 General Troubleshooting
1.11.3 Circuit Creation Error with VT1.5 Circuit
Symptom
create connection object at node_name" message when trying to create a VT1.5 circuit in CTC.
1.11.4 Unable to Create Circuit From DS-3 Card to DS3XM-6 or DS3XM-12 Card
Symptom
Note
1.11.5 DS-3 Card Does Not Report AIS-P From External Equipment
Symptom
external equipment/line side.
November 2009
You receive an "Error while finishing circuit creation. Unable to provision circuit. Unable to
You might have run out of bandwidth on the VT cross-connect matrix at the
Possible Cause
ONS 15454 indicated in the error message.
Recommended Action 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 "Circuits and Tunnels" chapter in the Cisco ONS 15454 Reference Manual for more
information.
You cannot create a circuit from a DS-3 card to a DS3XM-6 or DS3XM-12 card.
A DS-3 card and a DS3XM-6 or DS3XM-12 card have different functions.
Possible Cause
Recommended Action A DS3XM-6 card converts each of its six DS-3 interfaces into 28 DS-1s for
cross-connection through the network. The DS3XM-12 converts each of its 12 interfaces into up to
48 DS-1s. Thus, you can create a circuit from a DS3XM-6 or DS3XM-12 card to a DS-1 card, but
not from a DS3XM 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 or DS3XM-12 has a VT payload with a C2 hex
value of 02.
You can find instructions for creating circuits in the "Create Circuits and VT Tunnels" chapter
of the Cisco ONS 15454 Procedure Guide.
A DS3-12, DS3N-12, DS3-12E, or DS3N-12E card does not report STS AIS-P from the
The card is functioning as designed.
Possible Cause
Recommended Action 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 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 "Performance
Monitoring" chapter in the Cisco ONS 15454 Reference Manual.
1.11.3 Circuit Creation Error with VT1.5 Circuit
Cisco ONS 15454 Troubleshooting Guide, R8.5
1-137