SpectraLink IP-DECT Server 400 Deployment Manual page 31

Deployment Guide
Chapter 6: Troubleshooting
Synchronization
Table 4 Synchronization
Symptom
All base stations are
synchronization masters
Synchronization is OK at
startup but fails after a
short period
Base stations do not
synchronize or loose
synchronization often.
14169000 Version 9.3
October, 2016
Problem
Multicast traffic is blocked in
the network.
IGMP snooping is active, but
no IGMP querier is present on
the network to refresh multicast
group memberships.
The traffic between base
stations is being delayed a
varying amount of time due to
traffic load, switch quality or
configuration.
Resolution
Enable multicast traffic on all switches between
the base stations.
Add an IGMP querier to the network or disable
IGMP snooping.
Reconfigure/replace switches or change the
network topology to minimize the transmission
time variance.
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