2 CMTS with 1 CNR ver. 6

I try to connect 2 CMTS UBR 7200 with 4 MC28U, i use CNR ver 6, the first CMTS no failure, but the second, Cable modem stays in INIT (o). In CNR the error shown in the TFTP server is:

file/tftp/1 Info Server 0 10084 Client 172.11.1.3:1689 Dropping duplicate request packet

the question is: How can I connect 2 CMTS in the same CNR?

I appreciate your valuable assistance

Config:

CPU with CNR:

IP 192.168.11.1
Gateway 192.168.11.253

CMTS 1

interface GigabitEthernet0/1
description uBR/HCF
ip address 192.168.11.253 255.255.255.0
!
interface Cable6/0
description Cable/HFC
ip address 172.10.128.1 255.255.128.0 secondary
ip address 172.10.0.1 255.255.128.0
ip route-cache flow
cable tftp-enforce
cable max-hosts 255
cable bundle 1 master
cable downstream annex B
cable downstream modulation 256qam
cable downstream interleave-depth 32
cable downstream frequency 741000000
cable downstream channel-id 32
no cable downstream rf-shutdown
cable downstream rf-power 50
cable upstream 0 frequency 33008000
cable upstream 0 ingress-noise-cancellation 200
cable upstream 0 power-level 0
cable upstream 0 channel-width 1600000 1600000
cable upstream 0 minislot-size 4
cable upstream 0 range-backoff 3 6
cable upstream 0 modulation-profile 41
cable upstream 0 s160-atp-workaround
no cable upstream 0 shutdown
cable upstream 1 frequency 33008000
cable upstream 1 ingress-noise-cancellation 200
cable upstream 1 power-level 0
cable upstream 1 channel-width 1600000 1600000
cable upstream 1 minislot-size 4
cable upstream 1 range-backoff 3 6
cable upstream 1 modulation-profile 41
cable upstream 1 s160-atp-workaround
no cable upstream 1 shutdown
cable upstream 2 frequency 33008000
cable upstream 2 ingress-noise-cancellation 200
cable upstream 2 power-level 0
cable upstream 2 channel-width 1600000 1600000
cable upstream 2 minislot-size 4
cable upstream 2 range-backoff 3 6
cable upstream 2 modulation-profile 41
cable upstream 2 s160-atp-workaround
no cable upstream 2 shutdown
cable upstream 3 frequency 33008000
cable upstream 3 ingress-noise-cancellation 200
cable upstream 3 power-level 0
cable upstream 3 channel-width 1600000 1600000
cable upstream 3 minislot-size 4
cable upstream 3 range-backoff 3 6
cable upstream 3 modulation-profile 41
cable upstream 3 s160-atp-workaround
no cable upstream 3 shutdown
cable source-verify dhcp
cable dhcp-giaddr policy
cable helper-address 192.168.11.1
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.11.254

CMTS 2:

interface GigabitEthernet0/1
ip address 192.168.11.252 255.255.255.0
!
interface Cable3/0
description cable/HFC
no ip address
cable tftp-enforce
no cable packet-cache
cable max-hosts 255
cable bundle 1
cable downstream channel-id 1
cable downstream annex B
cable downstream modulation 256qam
cable downstream interleave-depth 32
cable downstream frequency 723000000
no cable downstream rf-shutdown
cable downstream rf-power 50
cable upstream max-ports 4
cable upstream 0 connector 0
cable upstream 0 frequency 33008000
cable upstream 0 docsis-mode tdma
cable upstream 0 channel-width 1600000 1600000
cable upstream 0 minislot-size 4
cable upstream 0 power-level 0
cable upstream 0 range-backoff 3 6
cable upstream 0 modulation-profile 41
no cable upstream 0 shutdown
cable upstream 1 connector 1
cable upstream 1 frequency 33008000
cable upstream 1 docsis-mode tdma
cable upstream 1 channel-width 1600000 1600000
cable upstream 1 minislot-size 4
cable upstream 1 power-level 0
cable upstream 1 range-backoff 3 6
cable upstream 1 modulation-profile 41
no cable upstream 1 shutdown
cable upstream 2 connector 2
cable upstream 2 frequency 33008000
cable upstream 2 docsis-mode tdma
cable upstream 2 channel-width 1600000 1600000
cable upstream 2 minislot-size 4
cable upstream 2 power-level 0
cable upstream 2 range-backoff 3 6
cable upstream 2 modulation-profile 41
no cable upstream 2 shutdown
cable upstream 3 connector 3
cable upstream 3 frequency 33008000
cable upstream 3 docsis-mode tdma
cable upstream 3 channel-width 1600000 1600000
cable upstream 3 minislot-size 4
cable upstream 3 power-level 0
cable upstream 3 range-backoff 3 6
cable upstream 3 modulation-profile 41
no cable upstream 3 shutdown
!

interface Bundle1
ip address 172.11.128.1 255.255.128.0 secondary
ip address 172.11.0.1 255.255.128.0
ip route-cache flow
no cable arp filter request-send
no cable arp filter reply-accept
cable source-verify dhcp
cable dhcp-giaddr policy
cable helper-address 192.168.11.1
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.11.254

CNR

ScopeCM1 172.10.0.0/17
ScopeCPE1 172.10.128.0/17

ScopeCM2 172.11.0.0/17
ScopeCPE2 172.11.128.0/17