I cant ping ATM interface (cant connect to internet)

[hamidreza]

Can you guide me how can i change my currern router config to connect to internet.
we Have cisco 2851 and modem module 1SHDSL-V3.
I cant ping ip adrees of ATM interface.
CD LED = Green
OK LED=GReen
----------------------------
controller DSL 0/0/0
mode atm
line-term cpe
line-mode auto enhanced
dsl-mode shdsl symmetric annex B
!
interface GigabitEthernet0/0
ip address 217.219.X.X 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet0/1
no ip address
shutdown
!
interface ATM0/0/0
ip address 10.20.X.X 255.255.255.252
no atm ilmi-keepalive
pvc 17/33
encapsulation aal5snap
!
!
ip route 0.0.0.0 0.0.0.0 ATM0/0/0

------------------------------------

Some troubleshooting Reports
Router#show atm traffic
Input OAM Queue: 0/52 (size/max)
23759 Input packets
92 Output packets
0 Broadcast packets
0 Packets received on non-existent VC
44 Packets attempted to send on non-existent VC
4 OAM cells received
F5 InEndloop: 1, F5 InSegloop: 1, F5 InAIS: 0, F5 InRDI: 0
F5 InEndcc: 1, F5 InSegcc: 1,
F4 InEndloop: 0, F4 InSegloop: 0, F4 InAIS: 0, F4 InRDI: 0
2 OAM cells sent
F5 OutEndloop: 1, F5 OutSegloop: 1, F5 OutAIS: 0 F5 OutRDI: 0
F5 OutEndcc: 0, F5 OutSegcc: 0,
F4 OutEndloop: 0, F4 OutSegloop: 0, F4 OutRDI: 0 F4 OutAIS: 0
2 OAM cell drop
---------------------
Router#show atm map
Map list ATM0/0/0_ATM_INARP : DYNAMIC
ip 10.20.51.201 maps to VC 1, VPI 17, VCI 33, ATM0/0/0
--------------------------
Router#show atm class-links 17/33
Displaying vc-class inheritance for ATM0/0/0, vc 17/33:
no broadcast - Not configured - using default
encapsulation aal5snap - Configured on vc directly
no ilmi manage - Not configured - using default
inarp 15 - Not configured - using default
no oam-pvc manage - Not configured - using default
protocol ip inarp no broadcast - Not configured - using default
protocol ipx inarp no broadcast - Not configured - using default
ubr - Not configured - using default
------------------------
Router#show atm interface atm0/0/0
Interface ATM0/0/0:
AAL enabled: AAL5 , Maximum VCs: 23, Current VCCs: 1
VCIs per VPI: 256,
Max. Datagram Size: 4528
PLIM Type: GSHDSL - 1088Kbps, Framing is Unknown,, TX clocking: LINE
1257 input, 93 output, 30532 IN fast, 0 OUT fast
Avail bw = 1088
Config. is ACTIVE
--------------------------
Router#show atm vc
VCD / Peak Avg/Min Burst
Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells Sts

0/0/0 1 17 33 PVC SNAP UBR 1088 UP
-------------------------
Router#Debug atm errors
*Feb 20 14:39:21.882: ATM(ATM0/0/0): Encapsulation error1, link=7, host=D9DBAD5
*Feb 20 14:39:21.882: ATM(ATM0/0/0): Encapsulation error1, link=7, host=D9DBAD5

thanks in advance for your helps.

Best Regards
Hamid Reza