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

Configuring the maximum number of dynamic ARP entries ························································································· 4

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

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

Displaying and maintaining ARP ····································································································································· 6

Static ARP configuration example ··································································································································· 6

Network requirements ·············································································································································· 6

Configuration procedure ········································································································································· 7

Multiport ARP entry configuration example ···················································································································· 7

Configuring gratuitous ARP ······································································································································· 10

Gratuitous ARP packet learning ··························································································································· 10

Periodic sending of gratuitous ARP packets ······································································································· 10

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

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

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

Displaying proxy ARP ···················································································································································· 12

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

Configuring ARP snooping ········································································································································ 14

Displaying and maintaining ARP snooping ················································································································ 14

Configuring IP addressing ········································································································································· 15

IP address classes ·················································································································································· 15

Special IP addresses ············································································································································· 16

Subnetting and masking ······································································································································· 16

Assigning an IP address to an interface ······················································································································ 17

Configuration guidelines ······································································································································ 17

Configuring IP unnumbered ·········································································································································· 17

Configuration prerequisites ·································································································································· 18

Displaying and maintaining IP addressing ················································································································· 18

IP address configuration example ································································································································ 18