Cisco IOS IP Addressing Services Command Reference Americas Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 527-0883 THESPECIFICATIONSANDINFORMATIONREGARDINGTHEPRODUCTSINTHISMANUALARESUBJECTTOCHANGEWITHOUTNOTICE.ALLSTATEMENTS, INFORMATION,ANDRECOMMENDATIONSINTHISMANUALAREBELIEVEDTOBEACCURATEBUTAREPRESENTEDWITHOUTWARRANTYOFANYKIND, EXPRESSORIMPLIED.USERSMUSTTAKEFULLRESPONSIBILITYFORTHEIRAPPLICATIONOFANYPRODUCTS. THESOFTWARELICENSEANDLIMITEDWARRANTYFORTHEACCOMPANYINGPRODUCTARESETFORTHINTHEINFORMATIONPACKETTHATSHIPPEDWITH THEPRODUCTANDAREINCORPORATEDHEREINBYTHISREFERENCE.IFYOUAREUNABLETOLOCATETHESOFTWARELICENSEORLIMITEDWARRANTY, CONTACTYOURCISCOREPRESENTATIVEFORACOPY. TheCiscoimplementationofTCPheadercompressionisanadaptationofaprogramdevelopedbytheUniversityofCalifornia,Berkeley(UCB)aspartofUCB'spublicdomainversion oftheUNIXoperatingsystem.Allrightsreserved.Copyright©1981,RegentsoftheUniversityofCalifornia. NOTWITHSTANDINGANYOTHERWARRANTYHEREIN,ALLDOCUMENTFILESANDSOFTWAREOFTHESESUPPLIERSAREPROVIDED“ASIS"WITHALLFAULTS. CISCOANDTHEABOVE-NAMEDSUPPLIERSDISCLAIMALLWARRANTIES,EXPRESSEDORIMPLIED,INCLUDING,WITHOUTLIMITATION,THOSEOF MERCHANTABILITY,FITNESSFORAPARTICULARPURPOSEANDNONINFRINGEMENTORARISINGFROMACOURSEOFDEALING,USAGE,ORTRADEPRACTICE. INNOEVENTSHALLCISCOORITSSUPPLIERSBELIABLEFORANYINDIRECT,SPECIAL,CONSEQUENTIAL,ORINCIDENTALDAMAGES,INCLUDING,WITHOUT LIMITATION,LOSTPROFITSORLOSSORDAMAGETODATAARISINGOUTOFTHEUSEORINABILITYTOUSETHISMANUAL,EVENIFCISCOORITSSUPPLIERS HAVEBEENADVISEDOFTHEPOSSIBILITYOFSUCHDAMAGES. AnyInternetProtocol(IP)addressesandphonenumbersusedinthisdocumentarenotintendedtobeactualaddressesandphonenumbers.Anyexamples,commanddisplayoutput,network topologydiagrams,andotherfiguresincludedinthedocumentareshownforillustrativepurposesonly.AnyuseofactualIPaddressesorphonenumbersinillustrativecontentisunintentional andcoincidental. CiscoandtheCiscologoaretrademarksorregisteredtrademarksofCiscoand/oritsaffiliatesintheU.S.andothercountries.ToviewalistofCiscotrademarks,gotothisURL:http:// www.cisco.com/go/trademarks.Third-partytrademarksmentionedarethepropertyoftheirrespectiveowners.Theuseofthewordpartnerdoesnotimplyapartnership relationshipbetweenCiscoandanyothercompany.(1110R) ©2017CiscoSystems,Inc.Allrightsreserved. CONTENTS CHAPTER 1 accountingDHCPthroughcleariproute 1 accounting(DHCP) 3 accounting(DHCPforIPv6) 6 addressclient-id 7 addresshardware-address 9 addressprefix 11 addressrange 12 applicationredundancy 14 algsipblacklist 15 algsipprocessor 17 algsiptimer 18 arp(global) 20 arp(interface) 23 arpaccess-list 25 arpauthorized 29 arplogthresholdentries 31 arppacket-priorityenable 33 arpprobeinterval 35 arptimeout 37 asymmetric-routing 39 authentication 41 authorizationmethod(DHCP) 43 authorizationshared-password 45 authorizationusername(DHCP) 47 auto-ip-ring 51 auto-ip-ringipv4-auto 53 auto-ip-ringipv4-seed 55 auto-ip-ringserver 57 Cisco IOS IP Addressing Services Command Reference iii Contents basic-mapping-rule 59 bootfile 60 cache-memory-max 61 class(DHCP) 63 cleararpinterface 65 cleararp-cache 66 cleararp-cachecountersha 69 clearhost 71 cleariparpinspectionlog 74 cleariparpinspectionstatistics 75 cleariparppollstatistics 76 clearipdhcpbinding 77 clearipdhcpconflict 79 clearipdhcplimitlease 81 clearipdhcpserverstatistics 83 clearipdhcpsnoopingbinding 84 clearipdhcpsnoopingdatabasestatistics 85 clearipdhcpsnoopingstatistics 86 clearipdhcpsubnet 87 clearipinterface 89 clearipnattranslation 91 clearipnattranslationredundancy 94 clearipnhrp 95 cleariproute 97 CHAPTER 2 cleariproutedhcpthroughiparpentrylearn 99 cleariproutedhcp 102 clearipsnatsessions 104 clearipsnattranslationdistributed 105 clearipsnattranslationpeer 106 clearipdhcpsnoopingdatabasestatistics 107 cleariptranslationpeer 108 clearipv6dhcp 109 clearipv6dhcpbinding 110 clearipv6dhcpclient 112 Cisco IOS IP Addressing Services Command Reference iv Contents clearipv6dhcpconflict 113 clearipv6dhcp-ldrastatistics 115 clearipv6dhcprelaybinding 117 clearipv6dhcproute 119 clearipv6nattranslation 120 clearloggingipaccess-listcache 122 clearmdnscache 123 clearmdnsservice-types 125 clearmdnsstatistics 127 clearnat64hastatistics 129 clearnat64statistics 130 clearnat64translations 132 client-identifier 134 client-name 136 control 138 data 140 ddns(DDNS-update-method) 142 default-mapping-rule 144 default-router 146 designated-gateway 148 device-role(DHCPv6Guard) 150 dnsforwarder 151 dnsforwarding 154 dnsforwardingsource-interface 156 dns-server 158 dns-server(config-dhcp-global-options) 160 dns-server(IPv6) 161 domainlist 163 domainlookup 165 domainmulticast 167 domainname 169 domain-name(IPv6) 171 domainname-server 172 domainname-serverinterface 174 domainresolversource-interface 177 Cisco IOS IP Addressing Services Command Reference v Contents domainretry 179 domainround-robin 180 domaintimeout 182 domain-name(DHCP) 183 designated-gateway 184 group(firewall) 186 hardware-address 187 host 190 host(host-list) 192 http(DDNS-update-method) 194 importall 198 importdns-server 200 importdomain-name 202 importinformationrefresh 204 importnisaddress 206 importnisdomain-name 208 importnispaddress 210 importnispdomain-name 212 importsipaddress 214 importsipdomain-name 216 importsntpaddress 218 informationrefresh 220 internal(DDNS-update-method) 222 intervalmaximum 224 intervalminimum 226 ipaddress 229 ipaddressdhcp 232 ipaddresspool(DHCP) 236 iparpentrylearn 238 CHAPTER 3 iparpgratuitousthroughipdhcppingpackets 241 iparpgratuitous 243 iparpincomplete 245 iparpinspectionfiltervlan 246 iparpinspectionlimit(interfaceconfiguration) 248 Cisco IOS IP Addressing Services Command Reference vi Contents iparpinspectionlog-buffer 250 iparpinspectiontrust 252 iparpinspectionvalidate 253 iparpinspectionvlan 255 iparpinspectionvlanlogging 257 iparppoll 259 iparpproxydisable 260 iparpqueue 261 ipclassless 262 ipddnsupdatehostname 264 ipddnsupdatemethod 266 ipdefault-gateway 267 ipdhcpaaadefaultusername 269 ipdhcpbootpignore 271 ipdhcpclass 272 ipdhcpclient 274 ipdhcpclientauthenticationkey-chain 276 ipdhcpclientauthenticationmode 278 ipdhcpclientbroadcast-flag(interface) 280 ipdhcpclientclass-id 282 ipdhcpclientclient-id 284 ipdhcpclientdefault-routerdistance 286 ipdhcpclienthostname 288 ipdhcpclientlease 290 ipdhcpclientmobilerenew 292 ipdhcpclientrequest 294 ipdhcpclientroute 296 ipdhcpclientupdatedns 298 ipdhcpcompatibilitylease-queryclient 301 ipdhcpcompatibilitysuboptionlink-selection 303 ipdhcpconflictlogging 305 ipdhcpconflictresolution 307 ipdhcpdatabase 308 ipdhcpdebugascii-client-id 310 ipdhcpexcluded-address 311 Cisco IOS IP Addressing Services Command Reference vii Contents ipdhcpglobal-options 313 ipdhcplimitlease 314 ipdhcplimitleaselog 316 ipdhcplimitleaseperinterface 317 ipdhcplimited-broadcast-address 319 ipdhcppingpackets 321 CHAPTER 4 ipdhcppingtimeoutthroughipdhcp-clientforcerenew 323 ipdhcppingtimeout 325 ipdhcppool 327 ipdhcprelaybootpignore 329 ipdhcprelaypreferknown-good-server 330 ipdhcprelayforwardspanning-tree 332 ipdhcprelayinformationcheck 334 ipdhcprelayinformationcheck-reply 336 ipdhcprelayinformationoption 338 ipdhcprelayinformationoptionserver-id-override 342 ipdhcprelayinformationoptionsubscriber-id 344 ipdhcprelayinformationoptionvpn-id 346 ipdhcprelayinformationoption-insert 348 ipdhcprelayinformationpolicy 350 ipdhcprelayinformationpolicy-action 352 ipdhcprelayinformationtrust-all 354 ipdhcprelayinformationtrusted 356 ipdhcp-relaysource-interface 358 ipdhcprouteconnected 360 ipdhcpserverusesubscriber-idclient-id 361 ipdhcpsmart-relay 362 ipdhcpsnooping 363 ipdhcpsnoopingbinding 365 ipdhcpsnoopingdatabase 367 ipdhcpsnoopingdetectspurious 369 ipdhcpsnoopingdetectspuriousinterval 371 ipdhcpsnoopingdetectspuriousvlan 372 ipdhcpsnoopingglean 373 Cisco IOS IP Addressing Services Command Reference viii Contents ipdhcpsnoopinginformationoption 374 ipdhcpsnoopinglimitrate 376 ipdhcpsnoopingpackets 378 ipdhcpsnoopingverifymac-address 380 ipdhcpsnoopingvlan 382 ipdhcpsubscriber-idinterface-name 384 ipdhcpsupportoption55-override 385 ipdhcpsupporttunnelunicast 386 ipdhcpupdatedns 388 ipdhcpuse 390 ipdhcpusesubscriber-idclient-id 392 ipdhcp-clientbroadcast-flag 393 ipdhcp-clientdefault-routerdistance 395 ipdhcp-clientforcerenew 397 CHAPTER 5 ipdhcp-clientnetwork-discoverythroughipnatsip-sbc 399 ipdhcp-clientnetwork-discovery 401 ipdhcp-clientupdatedns 403 ipdhcpdrop-inform 406 ipdhcp-relayinformationoptionserver-override 407 ipdhcp-relaysource-interface 409 ipdhcp-server 411 ipdhcp-serverquerylease 413 ipdnsname-list 415 ipdnsprimary 418 ipdnsserver 420 ipdnsserverqueuelimit 421 ipdnsserverview-group 423 ipdnsspoofing 425 ipdnsview 427 ipdnsview-group 431 ipdnsview-list 433 ipdomainlist 436 ipdomainlookup 438 ipdomainmulticast 440 Cisco IOS IP Addressing Services Command Reference ix Contents ipdomainname 442 ipdomainrecursive 444 ipdomainretry 446 ipdomainround-robin 448 ipdomaintimeout 450 ipgratuitous-arps 452 iphost 454 iphost-list 460 iphostnamestrict 461 iplocal-proxy-arp 463 ipmobilearp 465 ipname-server 468 ipnat 470 ipnatcreateflow-entries 473 ipnatenable 475 ipnatinsidedestination 476 ipnatinsidesource 479 ipnatlogtranslationsflow-export 486 ipnatlogtranslationssyslog 488 ipnatoutsidesource 490 ipnatpiggyback-support 495 ipnatpool 497 ipnatservice 501 ipnatservicedns-reset-ttl 506 ipnatserviceenable-sym-port 508 ipnatservicepptp 510 ipnatsettingsmode 511 ipnatsettingspap 513 ipnatsettingssupportmappingoutside 517 ipnatsip-sbc 518 CHAPTER 6 ipnatsourcethroughiterate-ip-addrs 523 ipnatsource 526 ipnatstatefulid 529 ipnatswitchoverreplicationhttp 532 Cisco IOS IP Addressing Services Command Reference x
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