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Configuring ARP ··························································································································································· 1
Overview ············································································································································································ 1
ARP message format ················································································································································ 1
ARP operating mechanism ······································································································································ 1
ARP table ··································································································································································· 2
Configuring a static ARP entry ········································································································································· 3
Configuring a multiport ARP entry ··································································································································· 4
Setting the maximum number of dynamic ARP entries for a device ············································································ 5
Setting the maximum number of dynamic ARP entries for an interface ······································································ 5
Setting the aging timer for dynamic ARP entries ··········································································································· 6
Enabling dynamic ARP entry check ································································································································ 6
Enabling ARP logging ······················································································································································· 6
Displaying and maintaining ARP ····································································································································· 7
Configuration examples ··················································································································································· 8
Static ARP configuration example ·························································································································· 8
Multiport ARP entry configuration example ··········································································································· 9
Configuring gratuitous ARP ······································································································································· 11
Overview ········································································································································································· 11
Gratuitous ARP packet learning ··························································································································· 11
Periodic sending of gratuitous ARP packets ······································································································· 11
Configuration procedure ··············································································································································· 12
Enabling IP conflict notification ···································································································································· 12
Configuring proxy ARP ·············································································································································· 14
Enabling common proxy ARP ······································································································································· 14
Enabling local proxy ARP·············································································································································· 14
Displaying proxy ARP ···················································································································································· 14
Common proxy ARP configuration example ··············································································································· 15
Network requirements ··········································································································································· 15
Configuration procedure ······································································································································ 15
Verifying the configuration ··································································································································· 16
Configuring ARP snooping ········································································································································ 17
Configuration procedure ··············································································································································· 17
Displaying and maintaining ARP snooping ················································································································ 17
Configuring IP addressing ········································································································································· 18
Overview ········································································································································································· 18
IP address classes ·················································································································································· 18
Special IP addresses ············································································································································· 19
Subnetting and masking ······································································································································· 19
Assigning an IP address to an interface ······················································································································ 20
Configuration guidelines ······································································································································ 20
Configuration procedure ······································································································································ 20
Configuring IP unnumbered ·········································································································································· 20
Configuration guidelines ······································································································································ 21
Configuration prerequisites ·································································································································· 21
Configuration procedure ······································································································································ 21
Displaying and maintaining IP addressing ················································································································· 21
IP address configuration example ································································································································ 22
