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Configuring the NQA statistics function ··········································································································· 126
Configuring NQA history records saving function ·························································································· 126
Scheduling an NQA operation ·························································································································· 127
Displaying and maintaining NQA ····························································································································· 128
NQA configuration examples ···································································································································· 128
ICMP echo operation configuration example ·································································································· 128
DHCP operation configuration example ··········································································································· 130
DNS operation configuration example ············································································································· 131
FTP operation configuration example ··············································································································· 132
HTTP operation configuration example ············································································································· 134
UDP jitter operation configuration example ····································································································· 135
SNMP operation configuration example ·········································································································· 137
TCP operation configuration example ·············································································································· 139
UDP echo operation configuration example ···································································································· 140
Voice operation configuration example ··········································································································· 141
DLSw operation configuration example ············································································································ 144
NQA collaboration configuration example······································································································ 145
Configuring interface backup ································································································································ 148
Overview ······································································································································································· 148
Active and standby interfaces ···························································································································· 148
How interface backup works ····························································································································· 148
Interface backup configuration task list ····················································································································· 150
Configuring interface backup ····································································································································· 150
Configuring active/standby mode ···················································································································· 150
Associating an interface with a track entry ······································································································ 151
Configuring load balancing········································································································································ 151
Configuring the delay timer for the backup function to take effect on system startup ·········································· 152
Displaying and maintaining interface backup ·········································································································· 152
Interface backup configuration examples ················································································································· 153
Multi-interface backup configuration example ································································································· 153
Multi-interface load balancing configuration example ··················································································· 154
Index ········································································································································································ 157
