Gif Tunnels

[Ant�nio Amaral]

Hello,   I want to configure an IPv6 tunnel over one IPv6 network. My network topology is the following:   A------(xl0)--B-(xl1)----(vx0)--C--(vx1)-----(xl0)--D-(xl1)-------E   where: FreeBSD 4.5 routers: B and D are IPv6 multicast capable and IPv6 unicast capable                         FreeBSD 4.5 router C is only IPv6 unicast capable               Linux machines: A and E   I made the following commands:   on router B:    ifconfig gif0 create                      ifconfig gif0 inet6 aabb:1111::1 aabb:1111::2 prefixlen 128                     gifconfig gif0 inet6 (xl1)@B_ipv6_address (xl0)@D_ipv6_address                     ifconfig gif0 up   on router D:    ifconfig gif0 create                      ifconfig gif0 inet6 aabb:1111::2 aabb:1111::1 prefixlen 128 ---------------------------- after this command I cannot create the tunnel because the following message appears:                   " ifconfig ioctl (SIOCAIFADDR)"   I am sure that that address (aabb:1111::) has not be configure yet     Anybody knows why this is happens?   Thanks in advance -------------------------------------------------------------------------    Ant�nio Manuel Nunes C. Amaral         Instituto de Telecomunica��es - P�lo de Aveiro         Campus Universit�rio    3810-193 AVEIRO - PORTUGAL    Telef. 234 - 377900    Fax. 234 - 377901    e-mail: [EMAIL PROTECTED]                                  --------------------------------------------------------------------------