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Configuring ARP ····························································································· 1
Overview ···························································································································································· 1
ARP message format ································································································································· 1
ARP operating mechanism ························································································································ 1
ARP table ··················································································································································· 2
Command and hardware compatibility ··············································································································· 3
Configuring a static ARP entry ··························································································································· 3
Setting the maximum number of dynamic ARP entries for a device ·································································· 4
Setting the maximum number of dynamic ARP entries for an interface ···························································· 5
Setting the aging timer for dynamic ARP entries ······························································································· 5
Enabling dynamic ARP entry check ··················································································································· 5
Enabling ARP logging ········································································································································ 6
Displaying and maintaining ARP ························································································································ 6
Configuration examples ····································································································································· 7
Long static ARP entry configuration example ···························································································· 7
Short static ARP entry configuration example ···························································································· 8
Configuring gratuitous ARP ·········································································· 10
Overview ·························································································································································· 10
Gratuitous ARP packet learning ··············································································································· 10
Periodic sending of gratuitous ARP packets ···························································································· 10
Configuration procedure ·································································································································· 11
Enabling IP conflict notification ························································································································ 12
Configuring proxy ARP ················································································· 13
Enabling common proxy ARP ·························································································································· 13
Enabling local proxy ARP ································································································································ 13
Displaying proxy ARP ······································································································································ 13
Common proxy ARP configuration example ···································································································· 14
Network requirements ······························································································································ 14
Configuration procedure ··························································································································· 14
Verifying the configuration ························································································································ 15
Configuring ARP snooping ············································································ 16
Overview ·························································································································································· 16
Feature and hardware compatibility ················································································································· 16
Configuration procedure ·································································································································· 16
Displaying and maintaining ARP snooping ······································································································ 17
Configuring ARP fast-reply ··········································································· 18
Overview ·························································································································································· 18
Configuration procedure ·································································································································· 18
ARP fast-reply configuration example ·············································································································· 18
Network requirements ······························································································································ 18
Configuration procedure ··························································································································· 19
Configuring ARP PnP ··················································································· 20
Overview ·························································································································································· 20
Configuration prerequisites ······························································································································ 20
Configuration procedure ·································································································································· 20
Displaying and maintaining ARP PnP ·············································································································· 21
ARP PnP configuration example ······················································································································ 21
Network requirements ······························································································································ 21
Configuration procedure ··························································································································· 21
Verifying the configuration ························································································································ 22
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