Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP)

The alarm daemon fails to scale in large networks. Alarm Summary/TID SNMP traps exhaust the DCC 
buffers causing packet drop in large networks. There is no workaround for this; however, a workaround 
for the issue of the DCC buffer becoming exhausted is to divide the network into multiple OSPF areas. 
This issue is resolved in Release 6.2.

Nodes that are discovered through a TL1 tunnel might become permanently grayed out when the tunnel 
far end NE reboots. This condition can occur when one or more TL1 tunnels are active and a tunnel far 
end NE reboots. To recover from this condition, restart CTC. This issue is resolved in Release 6.1.

You cannot set the Gain (EXPGAIN) value using the TL1 ED-OTS command when the node is 
configured as Metro Access. Use CTC to set the gain in this case. This issue is resolved in Releases 6.1 
and 7.0, and in maintenance Release 6.0.1.

This section highlights new features and functionality for Release 6.2. For detailed documentation of 
each of these features, consult the user documentation.

Release 6.2 adds the following new software features.

With Release 6.2 the ONS 15454 supports E1 timing, enabling you to select between SONET and SDH 
timing hierarchies via a user provisionable field, Timing Mode. Release 6.2 E1 timing includes the 
following features:

Two E1 and 2Mhz BITS in interfaces, supporting SSM conversion from ITU-T to GR

Two E1 and 2Mhz BITS out interfaces, supporting SSM conversion from GR to ITU-T

SDH SSM information can be sent out on any optical port

System timing support, as per ITU-T G.813 Option 1, for networks optimized for E1

Release 6.2 CTC, EMS, and TL1 management interfaces fully support the E1 timing features only when 
dual TCC2P cards are installed. For further information on the E1 timing feature, consult the online 
version of the release notes (this document) for Release 6.2.