ZyXEL P-971M Bedienungsanleitung PDF herunterladen (Seite 37)

P-971M User’s Guide

Chapter 4 SNMP Event Log 36

DHCP FAILED - Request sent, No response (Critical)

Your P-971M sent a DHCP discovery broadcast message to the cable operator’s CMTS, and

received a DHCP offer message in response from the cable operator, but when it sent a DHCP

request message to the indicated DHCP server, it did not receive a DHCP response message.

No UCD's Received - Timeout (Critical)

Your P-971M has not received any periodic Upstream Channel Descriptor (UCD) messages

from the CMTS within the specified timeout period.

Unicast Ranging Received Abort Response - Re- initializing MAC (Critical)

Your P-971M is online and has sent a periodic Ranging Request (RNG-REQ) message to the

CMTS, but it received an Abort Ranging reply instead. Your P-971M will reset its cable

interface and restart the registration process in response. Note that this is not an ethernet MAC

frame type.

SYNC Timing Synchronization failure - Loss of Sync (Critical)

Your P-971M had locked on to the downstream channel for a period of time, but then the

channel lock was lost and it was unable to be reacquired within five SYNC signal periods.

Your P-971M has reset its cable interface in response to this condition.

No Maintenance Broadcasts for Ranging opportunities received - T2 time-

out (Critical)

Your P-971M did not receive a broadcast maintenance opportunity in which to transmit a

Ranging Request (RNG-REQ) within the required T2 timeout period (approximately 10

seconds). Your P-971M will reset its cable interface and restart the registration process.

Init RANGING Critical Ranging Request Retries exhausted (Critical)

Your P-971M has sent 16 Ranging Request (RNG-REQ) messages without

receiving a Ranging Response (RNG-RSP) reply message from your cable operator’s CMTS.

Your P-971M will reset its cable interface and restart the registration process. This error

message is typically caused by noise on the upstream channel that causes the loss of MAC-

layer messages. If your P-971M cannot raise its upstream channel transmit power to a level

that allows successful communication within the maximum timeout period, it resets its cable

interface and restarts the registration process.

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