Cable Modem(cisco) not detected by C3

Hello thank you for the reply

Here are some of the C3 running config

********************************************************
C3#show running-config
!****Generated on SAT SEP 12 00:09:32 2015

!****by S/W version 4.4.4.9
!
tacacs-server timeout 5
!
hostname "C3"
!
!boot system flash C:/4.4.4.9.bin
!
access-list 1 permit 203.118.247.246 0.0.0.3
access-list 101 deny udp any any eq netbios-ns
access-list 101 deny udp any any eq netbios-dgm
access-list 101 deny udp any any eq netbios-ss
access-list 101 deny udp any any eq 135
access-list 101 deny udp any any eq 444
access-list 101 deny udp any any eq 404
access-list 101 deny udp any any eq 445
access-list 101 deny udp any any eq 1434
access-list 101 deny udp any any eq 1900
access-list 101 deny tcp any any eq 135
access-list 101 deny tcp any any eq 138
access-list 101 deny tcp any any eq 137
access-list 101 deny tcp any any eq 139
access-list 101 deny tcp any any eq 445
access-list 101 deny tcp any any eq 593
access-list 101 deny tcp any any eq 4444
access-list 101 deny tcp any any eq 1433
access-list 101 permit ip any any

!
snmp-server contact "support@arrisi.com"
snmp-server location "3871 Lakefield Drive, Suite 300, Suwanee, GA 30024"
snmp-server engineboots 27
!
cable modem offline aging-time 86400
cable modem ucc max-failed-attempts 2
!
bridge aging-time 15000
bridge 0
bridge 1
!
file prompt quiet
no cli logging
no cli logging password
cli logging path /
cli logging size 1024
alias scm "show cable modem"
alias pacman "debug slot 0 sniff"
cli account "arris"
cli account "arris" password "arris"
cli account "arris" enable-password "arris"
no cli account "arris" secret-password
!
!
clock timezone UTC 0 0
!
packetcable authorize vanilla-docsis-mta
no packetcable multimedia
packetcable timer multimedia t1 30000
!
!
ip routing

default cpe subinterface Cable 1/0.0

default cm subinterface Cable 1/0.0
!
! attached sub-interfaces
!
interface FastEthernet 0/0
no description
no shutdown
! mac-address 0000.ca13.a82b
duplex auto
snmp trap link-status
load-interval 300
ip address 172.16.0.2 255.255.255.192
no allow-ip-only
management-access
no ip directed-broadcast
no ip source-verify
no ip source-verify subif
no ip l2-bg-to-bg-routing
ip verify-ip-address-filter
!
!
!
interface Cable 1/0
cable utilization-interval 10
cable insertion-interval automatic
cable sync-interval 10
cable ucd-interval 2000
cable max-ranging-attempts 16
cable sid-verify
cable flap-list size 500
cable flap-list power-adjust 3
cable flap-list aging 259200
cable flap-list insertion-time 180
no description
no shutdown
! mac-address 0000.ca13.a82d
load-interval 300
snmp trap link-status
ip address 10.128.0.1 255.255.0.0
ip address 123.128.0.1 255.255.0.0 secondary
no allow-ip-only
management-access
no cable source-verify
arp-broadcast-echo
l2-broadcast-echo
l2-multicast-echo
ip-broadcast-echo
ip-multicast-echo
no l2-broadcast-throttle
no downstream-dhcp-server-allowed
throttle-credits initial 15 running 2
ip access-group 101 in
ip igmp enable
ip dhcp relay
ip dhcp relay information option
no ip dhcp relay validate renew
ip dhcp relay non-broadcast
cable helper-address 172.16.0.1
cable dhcp-giaddr policy
cable downstream rate-limit
cable downstream admission-control 100
no cable downstream admission-limit
cable downstream broadcast service-class default
cable downstream multicast service-class default
cable downstream multicast admission-limit 90
no cable downstream priority-qos
cable downstream mac-mode docsis
cable downstream channel-id 1
cable downstream tsid 0
cable downstream channel-width 6mhz
cable downstream frequency 609000000
cable downstream interleave-depth 32
cable downstream modulation 64qam
cable downstream power-level 55
cable privacy accept-self-signed-certificate
no cable privacy check-cert-validity-periods
cable privacy kek life-time 604800
cable privacy tek life-time 43200
no cable shared-secret

no cable upstream 0 description
no cable upstream 0 shutdown
cable upstream 0 snmp trap link-status
cable upstream 0 mac-mode docsis

cable upstream 0 frequency 36000000
cable upstream 0 channel-width 3200000
cable upstream 0 power-level 0 fixed
cable upstream 0 low-power-offset -60
cable upstream 0 high-power-offset 60
cable upstream 0 group-id 1
cable upstream 0 plant-length 160
cable upstream 0 initial-ranging-delay 300
cable upstream 0 periodic-maintenance-interval 1000
cable upstream 0 short-periodic-maintenance-interval 100
cable upstream 0 minimum-unfrag-burst 600
cable upstream 0 admission-control 100
cable upstream 0 dominant-interval default
no cable upstream 0 admission-limit
cable upstream 0 voice-timeout 1
no cable upstream 0 priority-qos
no cable upstream 0 fixed-receive
no cable upstream 0.0 description
no cable upstream 0.0 shutdown
no cable upstream 0.0 snmp trap link-status
cable upstream 0.0 channel-id 1
cable upstream 0.0 channel-type TDMA
cable upstream 0.0 modulation-profile 1
no cable upstream 0.0 pre-equalization
cable upstream 0.0 minislot-size 4
cable upstream 0.0 trigger-index 0
cable upstream 0.0 snr-timeconstant 4
cable upstream 0.0 mer-timeconstant 8
cable upstream 0.0 rng-prm-guard 1
cable upstream 0.0 nrng-prm-guard 2
no cable upstream 0.0 ingress-cancellation
no cable upstream 0.0 impulse-mitigation
cable upstream 0.0 safe-config
cable upstream 0.0 extended-frequency-detect all-ranging
cable upstream 0.0 concatenation
cable upstream 0.0 fragmentation
cable upstream 0.0 contention-opp-latency 10000
cable upstream 0.0 contention-opps-with-data required
cable upstream 0.0 rate-limit
no cable upstream 0.0 priority-requests
cable upstream 0.0 tdma-minislot-mode ticks-constant
cable upstream 0.0 mer-measurement-mode rng-only
cable upstream 0.0 data-backoff automatic
cable upstream 0.0 range-backoff automatic
cable upstream 0.0 status activate
********************************************************

Here is the DHCP configuration
********************************************************
allow booting ;
allow bootp;
authoritative;;

ignore client-updates;
set vendorclass = option vendor-class-identifier;

#CM
subnet 10.128.0.0 netmask 255.255.0.0 {
interface en11s0f1;
option routers 10.128.0.1;
option domain-name-servers 8.8.8.8;
option domain-name "cv.net";
option subnet-mask 255.255.0.0;
range 10.128.0.2 10.128.255.224;
filename "256.cfg";
option bootfile-name "256.cfg";
default-lease-time 21600;
max-lease-time 43200;
next-server 172.16.0.1;
}

#CPE
subnet 123.128.0.0 netmask 255.255.0.0 {
range 123.128.1.1 123.128.255.254;
option routers 123.128.0.1;
default-lease-time 6300;
max-lease-time 7200;
next-server 172.16.0.1;
allow unknown-clients;
}
********************************************************

Here is the 256.cfg file
********************************************************
Network Access Control:on
Maximum Number of CPEs:1
Privacy Enable:off
Upstream Service Flow Encodings
Service Flow Reference:1
Quality of Service Parameter Set:provisioned admitted active
Traffic Priority:1
Upstream Maximum Sustained Traffic Rate:256000
Maximum Traffic Burst:1522
Minimum Reserved Traffic Rate:32000
Assumed Minimum Reserved Rate Packet Size:64
Timeout for Active QoS Parameters:0
Timeout for Admitted QoS Parameters:0
Maximum Concatenated Burst:1522
Service Flow Scheduling Type:Best Effort
Request/Transmission Policy:0000008A
IP Type of Service Overwrite:and-mask 0xFC or-mask 0x00
Downstream Service Flow Encodings
Service Flow Reference:101
Quality of Service Parameter Set:provisioned admitted active
Traffic Priority:1
Downstream Maximum Sustained Traffic Rate:256000
Maximum Traffic Burst:1522
Minimum Reserved Traffic Rate:32000
Assumed Minimum Reserved Rate Packet Size:64
Timeout for Active QoS Parameters:0
Timeout for Admitted QoS Parameters:0
Maximum Downstream Latency:0
********************************************************

By the way we only test two modem which is the INOVO Cable Modem(Model: IB-8120-W21) and CISCO cable modem(Model: DPC2100r3).
We fully register the INOVO cable modem with the Online status but it is not operational(Not giving IP or Internet to the CPE).
The other cm which is the CISCO CM can't even see(detect) in the 'show cable modem' command in C3.

Thanks in advance hope you can help us.

Sorry for my bad english.

Here is the cable modem show detail
*********************************************
C3#show cable modem detail

MAC address : 74ae.7600.6241
IP address : 10.128.133.20
CM Subinterface : C1/0
CPE Vlan-ID/Bridge-group : -/- C1/0
Primary SID : 1
DS/US Interface : C1/0/U0.0
Timing offset : 1440
Initial Timing Offset : 1440
Received Power : 5.0 dBmV (SNR = 37.6 dB)
MAC Version : D2.0
Provisioned mode : D1.1
Registration Type : D1.1
Enable DOCSIS2.0 Mode : Y
Capabilities : {Frag=Y, Concat=Y, PRIV=BPI+}
Sid / SAid Limit: : {Max US Sids=16, Max DS SAids=15}
Transmit Equalizer support: : {Taps/Symbol=1, Taps=24}
Upstream Modulation : TDMA
Ranging/Registration : online - BPI not enabled
Total good FEC CW : 6
Total corrected FEC : 0
Total uncorrected FEC : 0
Broadcast-throttle drops : 0
IP-throttle drops : 0
Offending Pkts dropped : 0 (0 bytes)
Successful UCC attempts : 0
Failed UCC attempts : 0
UCC capable : Yes
Number of CPE IPs : 0(Max CPE IPs = 16)
CFG Max-CPE : 1
Flaps : 10
Stn Mtn Failures : 0 aborts, 2 exhausted
Total US Flows : 1(1 active)
Total DS Flows : 1(1 active)
Total US Data : 2 packets, 92 bytes
Total US Throughput : 0 bits/sec, 0 packets/sec
Total DS Data : 2 packets, 160 bytes
Total DS Throughput : 0 bits/sec, 0 packets/sec
*********************************************

by the way we already successfully give a CPE address in the cable modem but still no internet access.

I will attach the screenshot of the wan interface of the inovo and its connection status.