beautypg.com
i
Contents
System maintenance and debugging ························································································································· 1
Ping ····················································································································································································· 1
Using a ping command to test network connectivity ···························································································· 1
Ping example ···························································································································································· 1
Tracert ················································································································································································ 3
Prerequisites ······························································································································································ 4
Using a tracert command to identify failed or all nodes in a path ····································································· 5
System debugging ···························································································································································· 5
Debugging information control switches················································································································ 5
Debugging a feature module ·································································································································· 6
Ping and tracert example ················································································································································· 7
NTP configuration ························································································································································ 9
NTP overview ···································································································································································· 9
NTP application ························································································································································ 9
NTP advantages ······················································································································································· 9
How NTP works ························································································································································ 9
NTP message format ············································································································································· 10
NTP operation modes ··········································································································································· 12
NTP configuration task list ············································································································································· 14
Configuring NTP operation modes ······························································································································ 14
Configuring NTP client/server mode ·················································································································· 15
Configuring the NTP symmetric peers mode ······································································································ 15
Configuring NTP broadcast mode ······················································································································· 16
Configuring NTP multicast mode ························································································································· 17
Configuring optional parameters for NTP ··················································································································· 18
Specifying the source interface for NTP messages ···························································································· 18
Disabling an interface from receiving NTP messages ······················································································· 18
Configuring the allowed maximum number of dynamic sessions ···································································· 19
Configuring access-control rights ································································································································· 19
Configuration prerequisites ·································································································································· 19
Configuration procedure ······································································································································ 19
Configuring NTP authentication ··································································································································· 20
Configuration prerequisites ·································································································································· 20
Configuration procedure ······································································································································ 20
Displaying and maintaining NTP ································································································································· 22
NTP configuration examples ········································································································································· 22
Configuring NTP client/server mode ·················································································································· 22
Configuring NTP broadcast mode ······················································································································· 23
Configuring NTP multicast mode ························································································································· 25
Configuring NTP client/server mode with authentication ················································································· 27
Configuring NTP broadcast mode with authentication ····················································································· 29
SNMP configuration ·················································································································································· 31
SNMP overview······························································································································································ 31
SNMP framework ·················································································································································· 31
SNMP protocol versions ······································································································································· 32
Configuring basic SNMP settings ································································································································ 32
Configuring basic SNMPv3 settings ··················································································································· 32
Configuring basic SNMPv1 and SNMPv2c settings ························································································· 33
