linux PPP拨号不能获取DNS和IP

./huawei-ppp-on --user=""  --pwd="" --pn=*99# --auth=chap --a
pn=1234
*=--user=
--pwd*=--pwd=
--pn*--pn=*99#
--auth*=--auth=chap
--apn*=--apn=1234
root@bsc913x:/bin# abort on (NO CARRIER)
abort on (NO DIALTONE)
abort on (ERROR)
abort on (NO ANSWER)
abort on (BUSY)
abort on (Username/Password Incorrect)
send (AT^M)
expect (OK)
AT^M^M
OK
 -- got itsend (ATH0^M)
expect (OK)
^M
ATH0^M^M
OK
 -- got itsend (AT+CGDCONT=1,"IP","1234"^M)
expect (OK)
^M
AT+CGDCONT=1,"IP","1234"^M^M
OK
 -- got itsend (ATDT*99#^M)
expect (CONNECT)
^M
ATDT*99#^M^M
CONNECT
 -- got itsend (^M)
Script /usr/sbin/chat -s -v -f /etc/ppp/huawei-chat finished (pid 2440), status                                                                                                  = 0x0
Serial connection established.
using channel 9
Using interface ppp0
Connect: ppp0 <--> /dev/ttyUSB0
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xd422e311> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x1 <accomp> <pcomp> <asyncmap 0x0> <mru 1500> <magic 0x545                                                                                                 > <auth chap MD5>]
sent [LCP ConfAck id=0x1 <accomp> <pcomp> <asyncmap 0x0> <mru 1500> <magic 0x545                                                                                                 > <auth chap MD5>]
rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0xd422e311> <pcomp> <accomp>]
rcvd [CHAP Challenge id=0x1 <4f0ee48a722110ff37f684387fc9fa0d>, name = "HUAWEI_C                                                                                                 HAP_SRVR"]
sent [CHAP Response id=0x1 <9630b946b5ad08bf859c805855f28687>, name = "card"]
rcvd [CHAP Success id=0x1 "Welcome!!"]
CHAP authentication succeeded: Welcome!!
CHAP authentication succeeded
sent [CCP ConfReq id=0x1 <deflate 15> <deflate(old#) 15> <bsd v1 15>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <                                                                                                 ms-dns2 0.0.0.0>]
rcvd [IPCP ConfReq id=0x1]
sent [IPCP ConfNak id=0x1 <addr 0.0.0.0>]
rcvd [LCP ProtRej id=0x2 80 fd 01 01 00 0f 1a 04 78 00 18 04 78 00 15 03 2f]
Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
rcvd [IPCP ConfNak id=0x1]
sent [IPCP ConfReq id=0x2 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <                                                                                                 ms-dns2 0.0.0.0>]
rcvd [IPCP ConfReq id=0x2]
sent [IPCP ConfAck id=0x2]
rcvd [IPCP ConfNak id=0x2]
sent [IPCP ConfReq id=0x3 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <                                                                                                 ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x3]
sent [IPCP ConfReq id=0x4 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <                                                                                                 ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x4]
sent [IPCP ConfReq id=0x5 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <                                                                                                 ms-dns2 0.0.0.0>]
rcvd [IPCP ConfReq id=0x3]
sent [IPCP ConfAck id=0x3]
rcvd [IPCP ConfNak id=0x5]
sent [IPCP ConfReq id=0x6 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <                                                                                                 ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x6]
sent [IPCP ConfReq id=0x7 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <                                                                                                 ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x7]
sent [IPCP ConfReq id=0x8 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x8]
sent [IPCP ConfReq id=0x9 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfReq id=0x4]
sent [IPCP ConfAck id=0x4]
rcvd [IPCP ConfNak id=0x9]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0xa]
sent [IPCP ConfReq id=0xb <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0xb]
sent [IPCP ConfReq id=0xc <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0xc]
sent [IPCP ConfReq id=0xd <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfReq id=0x5]
sent [IPCP ConfAck id=0x5]
rcvd [IPCP ConfNak id=0xd]
sent [IPCP ConfReq id=0xe <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0xe]
sent [IPCP ConfReq id=0xf <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0xf]
sent [IPCP ConfReq id=0x10 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x10]
sent [IPCP ConfReq id=0x11 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfReq id=0x6]
sent [IPCP ConfAck id=0x6]
rcvd [IPCP ConfNak id=0x11]
sent [IPCP ConfReq id=0x12 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x12]
sent [IPCP ConfReq id=0x13 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x13]
sent [IPCP ConfReq id=0x14 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x14]
sent [IPCP ConfReq id=0x15 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfReq id=0x7]
sent [IPCP ConfAck id=0x7]
rcvd [IPCP ConfNak id=0x15]
sent [IPCP ConfReq id=0x16 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x16]
sent [IPCP ConfReq id=0x17 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x17]
sent [IPCP ConfReq id=0x18 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x18]
sent [IPCP ConfReq id=0x19 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfReq id=0x8]
sent [IPCP ConfAck id=0x8]
rcvd [IPCP ConfNak id=0x19]
sent [IPCP ConfReq id=0x1a <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x1a]
sent [IPCP ConfReq id=0x1b <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [IPCP ConfNak id=0x1b]
sent [IPCP ConfReq id=0x1c <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
Modem hangup
Connection terminated.