Incorrect routing information ·················································································································· 133
Configuring IS-IS ······················································································· 135
Overview ························································································································································ 135
Terminology ··········································································································································· 135
IS-IS address format ······························································································································ 135
NET ························································································································································ 136
IS-IS area ··············································································································································· 137
IS-IS network types ································································································································ 138
IS-IS PDUs ············································································································································· 139
Protocols and standards ························································································································ 141
IS-IS configuration task list····························································································································· 141
Configuring basic IS-IS ·································································································································· 142
Configuration prerequisites ···················································································································· 142
Enabling IS-IS ········································································································································ 143
Configuring IS-IS route control ······················································································································· 144
Configuration prerequisites ···················································································································· 144
Configuring IS-IS link cost ······················································································································ 144
Advertising a default route ····················································································································· 147
Configuration prerequisites ···················································································································· 150
Configuring LSP parameters ·················································································································· 152
Setting the LSDB overload bit ················································································································ 156
Configuring the ATT bit ·························································································································· 157
Enabling IS-IS ISPF ······························································································································· 159
Enabling prefix suppression ··················································································································· 159
Configuring IS-IS PIC ····························································································································· 160
Configuration prerequisites ···················································································································· 162
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