Sntp-Host; Clear The Sntp-Host Alarm; Ssm-Dus - Cisco ONS 15600 SDH Troubleshooting Manual

Chapter 2 Alarm Troubleshooting
If the active and standby TSC cards have the same versions of software, it takes approximately three
Note
minutes for software to be updated on a standby TSC card.

2.6.174 SNTP-HOST

The Simple Network Timing Protocol (SNTP) Host Failure alarm indicates that an ONS node serving as
an IP proxy for the other ONS nodes in the ring is not forwarding SNTP information to the other ONS
nodes in the network. The forwarding failure can result from two causes, either the IP network attached
to the ONS proxy node is experiencing problems, or the ONS proxy node itself is not functioning
properly.

Clear the SNTP-HOST Alarm

Step 1 Ping the SNTP host from a workstation in the same subnet to ensure that communication is possible
within the subnet by completing the
Step 2 If the ping fails, contact the network administrator who manages the IP network that supplies the SNTP
information to the proxy and determine whether the network is experiencing problems which might
affect the SNTP server/router connecting to the proxy ONS 15600 SDH.
If no network problems exist, ensure that the ONS 15600 SDH proxy is provisioned correctly by
Step 3
completing the following steps:
a.
b.
c.
d.
If proxy is correctly provisioned, refer to the "Management Network Connectivity" chapter in the
Step 4
Cisco ONS 15600 SDH Reference Manual for more information on SNTP Host.
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 5
for more information or call Cisco TAC (1 800 553-2447).

2.6.175 SSM-DUS

The Synchronization Status Messaging (SSM) Changed to Do Not Use (DUS) condition occurs when
the synchronization status message quality level changes to DUS.
The port that reports the condition is not at fault. The condition applies to the timing source. SSM-DUS
prevents timing loops by providing a termination point for the signal usage.
July 2010
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: NE
In node view for the ONS node serving as the proxy, click the Provisioning > General tabs.
Ensure that the Use NTP/SNTP Server check box is checked.
If the Use NTP/SNTP Server check box is not checked, click it.
Ensure that the Use NTP/SNTP Server field contains a valid IP address for the server.
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
Logical Objects: BITS, STMN
"Ping the ONS 15600" procedure on page
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
2.6.174 SNTP-HOST
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