eigrp SIA queries

HI gurus,
i needed clarification on the following questions

1) router R1 running eigrp is struck in SIA . after three min R1 lost
neighbor relationship with R2 . how do i make R1 & R2 come out of SIA ..i
can think of rebooting the routers . but is there any command similar to
CLEAR IP OSPF PROCESS in Eigrp ?

whats the best way to make routers come out of SIA without rebooting them ?
can i reset and restart the eigrp process again ?

or is it that the routers became neighbors automatically when SIA stops say
after 5 min ?

2) if successor is down then traffic is routed via FS . After some time
successor comes online again .will the traffic now routed thorough successor
? or it will continue to send through FS . (i mean is preemption is
available ? )

thanks

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Received on Thu May 27 2010 - 19:38:16 ART