Overview ···························································································································································· 1

ARP message format ································································································································· 1

ARP operating mechanism ························································································································ 1

ARP table ··················································································································································· 2

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 ···························································· 4

Setting the aging timer for dynamic ARP entries ······························································································· 5

Enabling dynamic ARP entry check ··················································································································· 5

Enabling ARP logging ········································································································································ 5

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 ············································································ 9

Gratuitous ARP packet learning ················································································································· 9

Periodic sending of gratuitous ARP packets ······························································································ 9

Configuration procedure ·································································································································· 10

Enabling IP conflict notification ························································································································ 10

Configuring proxy ARP ················································································· 12

Enabling common proxy ARP ·························································································································· 12

Enabling local proxy ARP ································································································································ 12

Displaying proxy ARP ······································································································································ 13

Common proxy ARP configuration example ···································································································· 13

Network requirements ······························································································································ 13

Configuration procedure ··························································································································· 13

Verifying the configuration ························································································································ 14

Configuring ARP fast-reply ··········································································· 15

ARP fast-reply configuration example ·············································································································· 15

Network requirements ······························································································································ 15

Configuration procedure ··························································································································· 16

Configuring ARP PnP ··················································································· 17

Configuration prerequisites ······························································································································ 17

Displaying and maintaining ARP PnP ·············································································································· 18

ARP PnP configuration example ······················································································································ 18

Network requirements ······························································································································ 18

Configuration procedure ··························································································································· 18

Verifying the configuration ························································································································ 19

Configuring ARP suppression ······································································· 20

Displaying and maintaining ARP suppression ································································································· 21

ARP suppression configuration example ········································································································· 21

Network requirements ······························································································································ 21

Configuration procedure ··························································································································· 22

Verifying the configuration ························································································································ 22