5. Diagnostics and Troubleshooting
8000-A2-GB26-70
April 2002
5-11
Example 5. Link Restart Commanded Retrain Messages
The following SYSLOG messages have been received:
02/18/2000 15:16:15 Restart Caused by Link Restart DSL port 2
02/18/2000 15:17:01 Remote Restarted at 02/18/2000 15:16:52
02/18/2000 15:17:01 Remote Reed Solomon Restart, DSL port 2
Meaning:
The port card retrained because of a Link Restart command issued by an
operator. The remote unit retrained because the port card retrained.
Network Problems
To provide a practical aid in the isolation and resolution of Layer 2 network
difficulties, the guidelines in this section provide information on troubleshooting a
generic network containing the devices found in most networks.
The illustration below shows the generic network addressed by this chapter.
These procedures assume that Asynchronous Transfer Mode (ATM) is used on the
link between the IPC and the next hop router (NHR).
99-16153a-01
OI
Next Hop
Router
(NHR)
DSLAM
Clients
NMS
WAN
Hub
SN
SN
ISP
IPC
WAN
Service Domain
Management Domain
ISP = Internet Service Provider
IPC = Interworking Packet Concentrator
NMS = Network Management System
SN = Service Node
NMS
ISP
Gateway
Router
