[support] about Linux tunnel

[洪 堯倫]

now a corresponding node (CN) and a mobile node (MN) have built a tunnel link like below


CN ---------- router1 ------------MN

<--------------tunnel--------------->


and at next moment MN "handover" to other router like below


                   router2 ------------MN
                        |                       ^
                        |                        |
CN ---------- router1           ------|


does the tunnel (CN → MN) will still exist ?

if no ,how a new tunnel CN to MN built ?
 		 	   		  
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