[radvd-devel-l] Problem----Down one interface,Up another!

[John]

Hi

    I think if I down one interface and up another,It will receive the RA immediately from 

another interface.In fact,it doesn't.I down eth1,up eth2 and use ethereal to catch the 

packets,as follows:
......
No.   Time       Source                  Destination  Protocol  Info
1304 73.970193  fe80::20a:ebff:fe9b:fada  ff02::1     ICMPv6   Router advertisement
No.   Time       Source                  Destination  Protocol  Info
1305 74.019727  ::                        ff02::16    ICMPv6  Unknown (0xce) (Unknown (0x00))
No.   Time       Source                  Destination  Protocol   Info
1306 74.699676  ::                        ff02::16    ICMPv6  Unknown (0xce) (Unknown (0x00))
No. Time         Source                  Destination  Protocol   Info
1307 74.870249  fe80::20a:ebff:fe98:68b7  ff02::1     ICMPv6 Router advertisement
......
     We can see,the interval between last RA from eth1 and first RA from eth2 is nearly 

1s. Can this interval be reduced?How?

    And what the destination--ff02::16 mean?Can it be eliminated?

    Thank you very much!

John