I am ns2 simulation beginners, graduate are in urgent need to use it, do a simulation, want to improve, the source is PMIPv6, TCL is shown in the CN CBR traffic generator side, and then, MN is the receiving end mag1 and mag2 binding a proxy, the strange thing is mag can only receive PBU and PBA message packets, CBR package according to the truth through mag1 and mag2 to MN, but in PMIPagent recv () method can't get in, only in the encap and decap recv (), for a great god parsing ah, now want to be in a certain period of time, to establish bi-directional tunnel between mag1 and mag2 (this also won't), control the CBR traffic package from mag1 to mag2, but the premise is to get these packets, hope the great spirit guide, I qq728351657