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SHDSL_EFM-5-EFM_BOND_LINK_RATE_CHANGE: SHDSL EFM Bonding Group Link(#) bandwidth is changed.

We recently deployed a Pair of Cisco 1921 with HWIC-4SHDSL-E  in Slot 0 at both ends Cpe and CO. Below is a snapshot of the configuration from the CO end. The roles are stricttly at Layer 2.

controller SHDSL 0/0/0
termination co
dsl-group pairs  0, 1, 2, 3 efm-bond
  shdsl annex G coding auto-TCPAM
!
!
ip ssh version 2
bridge irb
! Layer 2 functionality
!
!
!
interface Loopback0
no ip address
no ip route-cache
!
interface GigabitEthernet0/0
description resnet-g
ip address 10.233.2.252 255.255.255.0
no ip route-cache
duplex auto
speed auto
bridge-group 1
!
interface GigabitEthernet0/1
no ip address
no ip route-cache
duplex auto
speed 100
bridge-group 1
!
interface Ethernet0/0/0
description rv-park-cpe
ip address 10.233.2.250 255.255.255.0
no ip route-cache
bridge-group 1

Feom show log

Dec 27 15:35:17.943: %SHDSL_EFM-5-EFM_BOND_LINK_RATE_CHANGE: SHDSL EFM Bonding Group Link(0) bandwidth is changed.
Dec 27 15:35:17.943: %SHDSL_EFM-5-EFM_BOND_LINK_RATE_CHANGE: SHDSL EFM Bonding Group Link(1) bandwidth is changed.
Dec 27 15:35:20.943: %SHDSL_EFM-5-EFM_BOND_LINK_RATE_CHANGE: SHDSL EFM Bonding Group Link(2) bandwidth is changed.
Dec 27 15:35:20.947: %SHDSL_EFM-5-EFM_BOND_LINK_RATE_CHANGE: SHDSL EFM Bonding Group Link(3) bandwidth is changed.
Dec 27 15:35:21.943: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0/0, changed state to down
Dec 27 15:35:22.943: %LINK-3-UPDOWN: Interface Ethernet0/0/0, changed state to down
Dec 27 15:37:40.105: %SHDSL_EFM-5-DSLGROUP_UPDOWN: SHDSL dsl-group state changed to up.
Dec 27 15:37:40.105: %SHDSL_EFM-5-EFM_BOND_LINK_RATE_CHANGE: SHDSL EFM Bonding Group Link(0) bandwidth is changed.
Dec 27 15:37:40.105: %SHDSL_EFM-5-EFM_BOND_LINK_RATE_CHANGE: SHDSL EFM Bonding Group Link(1) bandwidth is changed.
Dec 27 15:37:40.105: %SHDSL_EFM-5-EFM_BOND_LINK_RATE_CHANGE: SHDSL EFM Bonding Group Link(2) bandwidth is changed.
Dec 27 15:37:40.109: %SHDSL_EFM-5-EFM_BOND_LINK_RATE_CHANGE: SHDSL EFM Bonding Group Link(3) bandwidth is changed.
Dec 27 15:37:42.105: %LINK-3-UPDOWN: Interface Ethernet0/0/0, changed state to up

Can't seem to pin point what is triggering the bandwidth to change

Any help is appreciated?

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