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Configuring IP forwarding basics ·························································································································· 117
Overview ······································································································································································· 117
FIB table ································································································································································ 117
Displaying and maintaining the FIB table ················································································································· 118
Configuring adjacency table·································································································································· 119
Overview ······································································································································································· 119
Introduction to adjacency table ························································································································· 119
Fields ····································································································································································· 119
Displaying and maintaining adjacency table ··········································································································· 120
Optimizing IP performance ···································································································································· 121
Overview ······································································································································································· 121
Enabling forwarding of directed broadcasts to a directly connected network ····················································· 121
Configuration guidelines ···································································································································· 121
Configuration procedure ···································································································································· 121
Configuration example ······································································································································· 122
Configuring the TCP send/receive buffer size ·········································································································· 123
Configuring TCP timers ················································································································································ 123
Configuring ICMP to send error packets ··················································································································· 124
Functions of sending ICMP error packets ········································································································· 124
Disadvantages of sending ICMP error packets ································································································ 125
Configuration procedure ···································································································································· 125
Enabling support for ICMP extensions ······················································································································· 126
ICMP extensions for MPLS ·································································································································· 126
Handling ICMP messages ·································································································································· 126
Configuration procedure ···································································································································· 127
Enabling ICMP flow control ········································································································································ 127
Displaying and maintaining IP performance optimization ······················································································ 127
Configuring UDP helper·········································································································································· 129
Overview ······································································································································································· 129
Configuration restrictions and guidelines ·················································································································· 129
Configuration procedure ············································································································································· 129
Displaying and maintaining UDP helper ··················································································································· 130
UDP helper configuration example ···························································································································· 130
Network requirements ········································································································································· 130
Configuration procedure ···································································································································· 130
Configuring IPv6 basics ·········································································································································· 132
Overview ······································································································································································· 132
IPv6 features ························································································································································· 132
IPv6 addresses ····················································································································································· 133
IPv6 neighbor discovery protocol ······················································································································ 136
IPv6 path MTU discovery ···································································································································· 138
IPv6 transition technologies ································································································································ 139
Protocols and standards ····································································································································· 140
IPv6 basics configuration task list ······························································································································· 140
Configuring basic IPv6 functions ································································································································ 141
Enabling IPv6 ······················································································································································· 141
Configuring IPv6 global unicast addresses ······································································································ 141
Configuring an IPv6 link-local address ············································································································· 142
Configuring an IPv6 anycast address ··············································································································· 143
Configuring IPv6 ND ··················································································································································· 144
Configuring a static neighbor entry ·················································································································· 144
Configuring the maximum number of neighbors dynamically learned ························································· 144
