1@node IPv6 Support 2@chapter IPv6 Support 3 4Quagga fully supports IPv6 routing. As described so far, Quagga supports 5RIPng, OSPFv3, Babel and BGP-4+. You can give IPv6 addresses to an interface 6and configure static IPv6 routing information. Quagga IPv6 also provides 7automatic address configuration via a feature called @code{address 8auto configuration}. To do it, the router must send router advertisement 9messages to the all nodes that exist on the network. 10 11@menu 12* Router Advertisement:: 13@end menu 14 15@node Router Advertisement 16@section Router Advertisement 17 18@deffn {Interface Command} {no ipv6 nd suppress-ra} {} 19Send router advertisment messages. 20@end deffn 21 22@deffn {Interface Command} {ipv6 nd suppress-ra} {} 23Don't send router advertisment messages. 24@end deffn 25 26@deffn {Interface Command} {ipv6 nd prefix @var{ipv6prefix} [@var{valid-lifetime}] [@var{preferred-lifetime}] [off-link] [no-autoconfig] [router-address]} {} 27Configuring the IPv6 prefix to include in router advertisements. Several prefix 28specific optional parameters and flags may follow: 29@itemize @bullet 30@item 31@var{valid-lifetime} - the length of time in seconds during what the prefix is 32valid for the purpose of on-link determination. Value @var{infinite} represents 33infinity (i.e. a value of all one bits (@code{0xffffffff})). 34 35Range: @code{<0-4294967295>} Default: @code{2592000} 36 37@item 38@var{preferred-lifetime} - the length of time in seconds during what addresses 39generated from the prefix remain preferred. Value @var{infinite} represents 40infinity. 41 42Range: @code{<0-4294967295>} Default: @code{604800} 43 44@item 45@var{off-link} - indicates that advertisement makes no statement about on-link or 46off-link properties of the prefix. 47 48Default: not set, i.e. this prefix can be used for on-link determination. 49 50@item 51@var{no-autoconfig} - indicates to hosts on the local link that the specified prefix 52cannot be used for IPv6 autoconfiguration. 53 54Default: not set, i.e. prefix can be used for autoconfiguration. 55 56@item 57@var{router-address} - indicates to hosts on the local link that the specified 58prefix 59contains a complete IP address by setting R flag. 60 61Default: not set, i.e. hosts do not assume a complete IP address is placed. 62@end itemize 63@end deffn 64 65@deffn {Interface Command} {ipv6 nd ra-interval <1-1800>} {} 66@deffnx {Interface Command} {no ipv6 nd ra-interval [<1-1800>]} {} 67The maximum time allowed between sending unsolicited multicast router 68advertisements from the interface, in seconds. 69 70Default: @code{600} 71@end deffn 72 73@deffn {Interface Command} {ipv6 nd ra-interval msec <70-1800000>} {} 74@deffnx {Interface Command} {no ipv6 nd ra-interval [msec <70-1800000>]} {} 75The maximum time allowed between sending unsolicited multicast router 76advertisements from the interface, in milliseconds. 77 78Default: @code{600000} 79@end deffn 80 81@deffn {Interface Command} {ipv6 nd ra-lifetime <0-9000>} {} 82@deffnx {Interface Command} {no ipv6 nd ra-lifetime [<0-9000>]} {} 83The value to be placed in the Router Lifetime field of router advertisements 84sent from the interface, in seconds. Indicates the usefulness of the router 85as a default router on this interface. Setting the value to zero indicates 86that the router should not be considered a default router on this interface. 87Must be either zero or between value specified with @var{ipv6 nd ra-interval} 88(or default) and 9000 seconds. 89 90Default: @code{1800} 91@end deffn 92 93@deffn {Interface Command} {ipv6 nd reachable-time <1-3600000>} {} 94@deffnx {Interface Command} {no ipv6 nd reachable-time [<1-3600000>]} {} 95The value to be placed in the Reachable Time field in the Router Advertisement 96messages sent by the router, in milliseconds. The configured time enables the 97router to detect unavailable neighbors. The value zero means unspecified (by 98this router). 99 100Default: @code{0} 101@end deffn 102 103@deffn {Interface Command} {ipv6 nd managed-config-flag} {} 104@deffnx {Interface Command} {no ipv6 nd managed-config-flag} {} 105Set/unset flag in IPv6 router advertisements which indicates to hosts that they 106should use managed (stateful) protocol for addresses autoconfiguration in 107addition to any addresses autoconfigured using stateless address 108autoconfiguration. 109 110Default: not set 111@end deffn 112 113@deffn {Interface Command} {ipv6 nd other-config-flag} {} 114@deffnx {Interface Command} {no ipv6 nd other-config-flag} {} 115Set/unset flag in IPv6 router advertisements which indicates to hosts that 116they should use administered (stateful) protocol to obtain autoconfiguration 117information other than addresses. 118 119Default: not set 120@end deffn 121 122@deffn {Interface Command} {ipv6 nd home-agent-config-flag} {} 123@deffnx {Interface Command} {no ipv6 nd home-agent-config-flag} {} 124Set/unset flag in IPv6 router advertisements which indicates to hosts that 125the router acts as a Home Agent and includes a Home Agent Option. 126 127Default: not set 128@end deffn 129 130@deffn {Interface Command} {ipv6 nd home-agent-preference <0-65535>} {} 131@deffnx {Interface Command} {no ipv6 nd home-agent-preference [<0-65535>]} {} 132The value to be placed in Home Agent Option, when Home Agent config flag is set, 133which indicates to hosts Home Agent preference. The default value of 0 stands 134for the lowest preference possible. 135 136Default: 0 137@end deffn 138 139@deffn {Interface Command} {ipv6 nd home-agent-lifetime <0-65520>} {} 140@deffnx {Interface Command} {no ipv6 nd home-agent-lifetime [<0-65520>]} {} 141The value to be placed in Home Agent Option, when Home Agent config flag is set, 142which indicates to hosts Home Agent Lifetime. The default value of 0 means to 143place the current Router Lifetime value. 144 145Default: 0 146@end deffn 147 148@deffn {Interface Command} {ipv6 nd adv-interval-option} {} 149@deffnx {Interface Command} {no ipv6 nd adv-interval-option} {} 150Include an Advertisement Interval option which indicates to hosts the maximum time, 151in milliseconds, between successive unsolicited Router Advertisements. 152 153Default: not set 154@end deffn 155 156@deffn {Interface Command} {ipv6 nd router-preference (high|medium|low)} {} 157@deffnx {Interface Command} {no ipv6 nd router-preference [(high|medium|low)]} {} 158Set default router preference in IPv6 router advertisements per RFC4191. 159 160Default: medium 161@end deffn 162 163@deffn {Interface Command} {ipv6 nd mtu <1-65535>} {} 164@deffnx {Interface Command} {no ipv6 nd mtu [<1-65535>]} {} 165Include an MTU (type 5) option in each RA packet to assist the attached hosts 166in proper interface configuration. The announced value is not verified to be 167consistent with router interface MTU. 168 169Default: don't advertise any MTU option 170@end deffn 171 172@example 173@group 174interface eth0 175 no ipv6 nd suppress-ra 176 ipv6 nd prefix 2001:0DB8:5009::/64 177@end group 178@end example 179 180For more information see @cite{RFC2462 (IPv6 Stateless Address Autoconfiguration)} 181, @cite{RFC4861 (Neighbor Discovery for IP Version 6 (IPv6))} 182, @cite{RFC6275 (Mobility Support in IPv6)} 183and @cite{RFC4191 (Default Router Preferences and More-Specific Routes)}. 184