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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
Configuring ARP fast update ··········································································································································· 7
Displaying and maintaining ARP ····································································································································· 8
Configuration examples ··················································································································································· 8
Static ARP configuration example ·························································································································· 8
Multiport ARP entry configuration example ··········································································································· 9
Configuring gratuitous ARP ······································································································································· 12
Overview ········································································································································································· 12
Gratuitous ARP packet learning ··························································································································· 12
Periodic sending of gratuitous ARP packets ······································································································· 12
Configuration procedure ··············································································································································· 13
Enabling IP conflict notification ···································································································································· 13
Configuring proxy ARP ·············································································································································· 15
Enabling common proxy ARP ······································································································································· 15
Enabling local proxy ARP·············································································································································· 15
Displaying proxy ARP ···················································································································································· 16
Common proxy ARP configuration example ··············································································································· 16
Network requirements ··········································································································································· 16
Configuration procedure ······································································································································ 16
Configuring ARP snooping ········································································································································ 18
Configuration procedure ··············································································································································· 18
Displaying and maintaining ARP snooping ················································································································ 18
Configuring IP addressing ········································································································································· 19
Overview ········································································································································································· 19
IP address classes ·················································································································································· 19
Special IP addresses ············································································································································· 20
Subnetting and masking ······································································································································· 20
Assigning an IP address to an interface ······················································································································ 21
Configuration guidelines ······································································································································ 21
Configuration procedure ······································································································································ 21
Configuring IP unnumbered ·········································································································································· 21
Configuration guidelines ······································································································································ 22
Configuration prerequisites ·································································································································· 22
Configuration procedure ······································································································································ 22
Displaying and maintaining IP addressing ················································································································· 22
IP address configuration example ································································································································ 23
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