ppp client request a wrong IP?

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http://serverfault.com – I have a router, which have a br0 bridge with 4 lan port, and the br0 ip address is,netmask, when I begin a l2tp connection with xl2tpd-1.3.1 & pppd-2.4.5,I found that the client can make a connection with peer, and I got the interface ppp0, the peer address is, but the ppp0 inet address is, is same as br0, and I never define the range of l2tp server side to include this address, so any tips? Below are my configuration of client side: /rwfs/etc/xl2tpd # cat xl2tpd.conf [global] ;listen-addr = [lns default] ip range = (HowTos)