R21xx-HP FlexFabric 11900 Network Management and Monitoring Configuration Guide

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Contents
Using ping, tracert, and system 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 ····································································· 4
Tracert example ························································································································································ 4
System debugging ···························································································································································· 5
Debugging information control switches················································································································ 6
Debugging a feature module ·································································································································· 6
Configuring NTP ·························································································································································· 7
Overview ············································································································································································ 7
How NTP works ························································································································································ 7
NTP architecture ······················································································································································· 8
Association modes ··················································································································································· 9
NTP security ··························································································································································· 10
NTP for MPLS VPNs ·············································································································································· 11
Protocols and standards ······································································································································· 12
Configuration restrictions and guidelines ···················································································································· 12
Configuration task list ···················································································································································· 12
Enabling the NTP service ·············································································································································· 12
Configuring NTP association modes ···························································································································· 13
Configuring NTP in client/server mode ·············································································································· 13
Configuring NTP in symmetric active/passive mode ························································································ 13
Configuring NTP in broadcast mode ·················································································································· 14
Configuring NTP in multicast mode ····················································································································· 15
Configuring access control rights ································································································································· 16
Configuring NTP authentication ··································································································································· 16
Configuring NTP authentication in client/server mode ····················································································· 17
Configuring NTP authentication in symmetric active/passive mode ······························································· 18
Configuring NTP authentication in broadcast mode ························································································· 20
Configuring NTP authentication in multicast mode ··························································································· 22
Configuring NTP optional parameters ························································································································· 24
Specifying the source interface for NTP messages ···························································································· 24
Disabling an interface from receiving NTP messages ······················································································· 25
Configuring the maximum number of dynamic associations ············································································ 25
Configuring the local clock as a reference source ····································································································· 26
Displaying and maintaining NTP ································································································································· 26
NTP client/server mode configuration example ········································································································· 27
IPv6 NTP client/server mode configuration example ································································································· 28
NTP symmetric active/passive mode configuration example ··················································································· 29
IPv6 NTP symmetric active/passive mode configuration example ··········································································· 31
NTP broadcast mode configuration example ············································································································· 33
NTP multicast mode configuration example ················································································································ 35
IPv6 NTP multicast mode configuration example ······································································································· 38
Configuration example for NTP client/server mode with authentication ································································· 41
Configuration example for NTP broadcast mode with authentication ····································································· 43