R2511-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V5)

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Configuring ARP ··························································································································································· 1
Overview ············································································································································································ 1
ARP message format ················································································································································ 1
ARP operation ··························································································································································· 1
ARP table ··································································································································································· 2
Configuring a static ARP entry ········································································································································· 3
Configuring the maximum number of dynamic ARP entries for an interface ······························································ 4
Setting the aging timer for dynamic ARP entries ··········································································································· 4
Enabling dynamic ARP entry check ································································································································ 5
Enabling natural mask support for ARP requests ··········································································································· 5
Displaying and maintaining ARP ····································································································································· 6
ARP entry configuration example ···································································································································· 6
Network requirements ·············································································································································· 6
Configuration procedure ········································································································································· 7
Configuring gratuitous ARP ········································································································································· 8
Overview ············································································································································································ 8
Enabling learning of gratuitous ARP packets ········································································································ 8
Configuring periodic sending of gratuitous ARP packets ···················································································· 8
Configuration guidelines ·················································································································································· 9
Configuration procedure ·················································································································································· 9
Configuring proxy ARP ·············································································································································· 10
Overview ········································································································································································· 10
Common proxy ARP ·············································································································································· 10
Local proxy ARP ····················································································································································· 10
Enabling common proxy ARP ······································································································································· 11
Enabling local proxy ARP·············································································································································· 11
Displaying and maintaining proxy ARP ······················································································································· 12
Proxy ARP configuration examples ······························································································································ 12
Common proxy ARP configuration example ··············································································································· 12
Local proxy ARP configuration example in case of port isolation ··································································· 13
Configuring ARP snooping ········································································································································ 15
Overview ········································································································································································· 15
Configuration procedure ··············································································································································· 15
Displaying and maintaining ARP snooping ················································································································ 15
DHCP overview ·························································································································································· 16
DHCP overview ······························································································································································ 16
Allocation mechanisms ········································································································································· 16
Dynamic IP address allocation process··············································································································· 17
IP address lease extension···································································································································· 17
DHCP message format ··················································································································································· 18
DHCP options ································································································································································· 19
Common DHCP options ········································································································································ 19
Custom options ······················································································································································ 19
Protocols and standards ················································································································································ 23
Configuring the DHCP server ···································································································································· 25
Overview ········································································································································································· 25