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Configuring ARP ·············································································· 1
About ARP ······························································································································· 1
ARP message format ··········································································································· 1
ARP operating mechanism ···································································································· 1
ARP entry types ·················································································································· 2
ARP tasks at a glance ················································································································· 3
Configuring a static ARP entry ······································································································ 3
Configuring a short static ARP entry ························································································ 4
Configuring a long static ARP entry ························································································· 4
Configuring a multiport ARP entry ··························································································· 4
Configuring features for dynamic ARP entries ·················································································· 5
Setting the dynamic ARP learning limit for a device ···································································· 5
Setting the dynamic ARP learning limit for an interface ································································ 5
Setting the aging timer for dynamic ARP entries ········································································· 6
Enabling dynamic ARP entry check ························································································· 6
Enabling ARP logging ················································································································· 7
Display and maintenance commands for ARP ·················································································· 7
ARP configuration examples ········································································································ 8
Example: Configuring a long static ARP entry ············································································ 8
Example: Configuring a short static ARP entry ··········································································· 9
Example: Configuring a multiport ARP entry ·············································································· 9
Configuring gratuitous ARP ······························································ 12
About gratuitous ARP ··············································································································· 12
IP conflict detection ············································································································ 12
Gratuitous ARP packet learning ···························································································· 12
Periodic sending of gratuitous ARP packets ············································································ 12
Gratuitous ARP tasks at a glance ································································································ 13
Enabling IP conflict notification ···································································································· 13
Enabling gratuitous ARP packet learning ······················································································ 13
Enabling periodic sending of gratuitous ARP packets······································································· 13
Enabling sending gratuitous ARP packets for ARP requests with sender IP address on a different subnet ·· 14
Configuring gratuitous ARP packet retransmission for the device MAC address change ·························· 14
Configuring proxy ARP ···································································· 15
About proxy ARP ····················································································································· 15
Enabling common proxy ARP ····································································································· 15
Enabling local proxy ARP ·········································································································· 15
Display and maintenance commands for proxy ARP ········································································ 15
Common proxy ARP configuration example ··················································································· 16
Example: Configuring common proxy ARP ·············································································· 16
Configuring ARP snooping ······························································· 18
About ARP snooping ················································································································ 18
Creation of ARP snooping entries ························································································· 18
Aging of ARP snooping entries ····························································································· 18
Protection for ARP snooping ································································································ 18
Enabling ARP snooping············································································································· 18
Display and maintenance commands for ARP snooping ··································································· 18
Configuring ARP direct route advertisement ········································· 20
About ARP direct route advertisement ·························································································· 20
Mechanism of ARP direct route advertisement ········································································· 20
Enabling ARP direct route advertisement ······················································································ 20
Configuring IP addressing ································································ 21
About IP addressing ················································································································· 21
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