ipv6 mtu
22-12 IPv6 Configuration
Thenoipv6enablecommanddisablesIPv6routingonaninterfacethathasbeenenabledwiththe
ipv6enablecommand,butitdoesnotdisableIPv6processingonaninterfacethatisconfigured
withanexplicitIPv6address.
Example
ThisexampleenablesIPv6processingonVLAN7.Notethatalinklocaladdresshasbeen
automaticallyconfigured.
C3(su)->router(Config-if(Vlan 7))# ipv6 enable
C3(su)->router>show ipv6 interface vlan 7
Vlan 7 Administrative Mode Enabled
Vlan 7 IPv6 Routing Operational Mode Enabled
IPv6 is Enabled
IPv6 Prefix is FE80::211:88FF:FE55:4A7F/128
Routing Mode Enabled
Interface Maximum Transmit Unit 1500
Router Duplicate Address Detection Transmits 1
Router Advertisement NS Interval 0
Router Lifetime Interval 1800
Router Advertisement Reachable Time 0
Router Advertisement Interval 600
Router Advertisement Managed Config Flag Disabled
Router Advertisement Other Config Flag Disabled
Router Advertisement Suppress Flag Disabled
ipv6 mtu
Thiscommandconfiguresthemaximumtransmissionunit(MTU)sizeofIPv6packetsthatcanbe
sentonaninterface.
Syntax
ipv6 mtu bytes
no ipv6 mtu
Parameters
Defaults
1480bytes
Mode
Routerinterfaceconfiguration:C3(su)>router(Configif(Vlan1))#
Usage
Themaximumtransmissionunitisthelargestpossibleunitofdatathatcanbesentonagiven
physicalmedium.UsethiscommandtosettheMTUforanIPv6interface.Thenoformofthis
commandresetstheMTUtothedefaultvalueof1480bytes.
Usetheshowipv6interfacetodisplaythecurrentsettingforthisinterface.
bytes SpecifiestheMTUvalueinbytes.Thevaluecanrangefrom1280to1500
bytes.TheMTUcannotbelargerthanthevaluesupportedbythe
underlyinginterface.