i
Contents
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
Configuring ARP fast update ···········································································································································6
Displaying and maintaining ARP·····································································································································6
Static ARP configuration example ···································································································································7
Network requirements··············································································································································7
Configuration procedure ·········································································································································7
Multiport ARP entry configuration example····················································································································8
Network requirements··············································································································································8
Configuration procedure ·········································································································································8
Configuring gratuitous ARP ······································································································································· 10
Overview········································································································································································· 10
Gratuitous ARP packet learning ··························································································································· 10
Periodic sending of gratuitous ARP packets ······································································································· 10
Configuration procedure ··············································································································································· 11
Configuring proxy ARP ·············································································································································· 12
Enabling common proxy ARP ······································································································································· 12
Enabling local proxy ARP·············································································································································· 12
Displaying proxy ARP ···················································································································································· 12
Common proxy ARP configuration example ··············································································································· 13
Network requirements··········································································································································· 13
Configuration procedure ······································································································································ 13
Configuring ARP snooping ········································································································································ 15
Configuration procedure ··············································································································································· 15
Displaying and maintaining ARP snooping ················································································································ 15
Configuring IP addressing ········································································································································· 16
Overview········································································································································································· 16
IP address classes ·················································································································································· 16
Special IP addresses ············································································································································· 17
Subnetting and masking ······································································································································· 17
Assigning an IP address to an interface ······················································································································ 18
Configuration guidelines ······································································································································ 18
Configuration procedure ······································································································································ 18
Configuring IP unnumbered ·········································································································································· 18
Configuration guidelines ······································································································································ 19
Configuration prerequisites ·································································································································· 19
Configuration procedure ······································································································································ 19
Displaying and maintaining IP addressing ················································································································· 19
IP address configuration example ································································································································ 20