Specifications

Managing the ARP Table
RoamAbout Mobility System Software Configuration Guide 5-25
Managing the ARP Table
TheAddressResolutionProtocol(ARP)tablemapsIPaddressestoMACaddresses.AnARPentry
entersthetableinoneofthefollowingways:
• AddedautomaticallybytheRoamAboutSwitch.AswitchaddsanentryforitsownMAC
addressandaddsentriesforaddresseslearnedfromtrafficreceivedbythe
RoamAbout
Switch.WhentheRoamAboutSwitchreceivesanIPpacket,theswitchaddsthepacket’s
sourceMACaddressandsourceIPaddresstotheARPtable.
• Addedbythesystemadministrator.Youcanadddynamic,static,andpermanententriesto
theARPtable.
ARPisenabledbydefaultonaRoamAbout
Switchandcannotbedisabled.
Displaying ARP Table Entries
TodisplayARPtableentries,usethefollowingcommand:
show arp [ip-addr]
Example
RBT-8100# show arp
ARP aging time: 1200 seconds
Host HW Address VLAN Type State
------------------------------ ----------------- ----- ------- --------
10.5.4.51 00:0b:0e:02:76:f5 1 DYNAMIC RESOLVED
10.5.4.53 00:0b:0e:02:76:f7 1 LOCAL RESOLVED
Thisexampleshowstwoentries.Thelocalentry(withLOCALintheTypefield)isforthe
RoamAboutSwitchitself.TheMACaddressofthelocalentryistheswitch’sMACaddress.The
ARPtablecontainsonelocalentryforeachVLANconfiguredontheswitch.Thedynamicentryis
learned
fromtrafficreceivedbytheswitch.TheARPtablecanalsocontainstaticandpermanent
entries,whichareaddedbyanadministrator.TheStatefieldindicateswhetheranentryis
resolved(RESOLVED)orwhetherMSShassentanARPrequestfortheentryandiswaitingfor
thereply(RESOLVING).
Adding an ARP Entry
MSSautomaticallyaddsalocalentryforaRoamAboutSwitchanddynamicentriesforaddresses
learnedfromtrafficreceivedbytheswitch.Youcanaddthefollowingtypesofentries:
• Dynamic—Agesoutbasedontheagingtimeout.
•Static—Doesnotageoutbutisremovedbyasoftwarereboot.
• Permanent—Doesnotageout 
andremainsintheARPtablefollowingasoftwarereboot.
ToaddanARPentry,usethefollowingcommand:
set arp {permanent | static | dynamic} ip-addr mac-addr