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Docsis Cable Modem not coming Online

Publication Date:  2019-07-09 Views:  935 Downloads:  0

Issue Description

Cable modem Docsis 2.0 and Docsis 3.0 not coming online

MA5633(config)#display cable modem all
{ <cr>|cpe<K>|detail<K>|ipv6<K>|sort-index<K>|sort-mac<K>|sort-state<K>|voice<K>||<K> }:

  Command:
          display cable modem all
-------------------------------------------------------------------------------
Idx   MAC            IP               I/F         Status   Prim  Num Ver  DS RX
                                                            SID   CPE      Power
-------------------------------------------------------------------------------
1     94CC-xxxx-BA24 10.x.x.204      0/1/0/U3    DHCP-C   1     0   D2.0 -   
-------------------------------------------------------------------------------
Total: 1
ol: 0, ol-ptd: 0, ol-pt: 0, ol-d: 0, wol: 0, wol-ptd: 0, wol-pt: 0, wol-d: 0,  pol: 0, pol-ptd: 0, pol-pt: 0, pol-d: 0, offline: 0, rej-m: 0, rej-pt: 0, rej-o: 0, init: 0, init-rc: 0, DHCP: 0, DHCP-O: 0, DHCP-R: 0, DHCP-C: 1, REG: 0,
DHCPv6: 0, DHCPv6-A: 0, DHCPv6-R: 0, DHCPv6-C: 0, TFTPv4-S: 0, TFTPv4-C: 0

IP statistics: ipv4-only: 1, ipv6-only: 0, dual-ip: 0, no-ip: 0

Note: 1. Idx is the index of a CM.
       2. The downstream received power is in the unit of dBmV.
       3. In status, "ol" means online, "rej" means reject.
       4. In IP column, "*" means that CM has an IPv6 address.

Alarm Information

Cable modem Online LED not stable

Handling Process


1. Check the Status of the CM on MA5633
2. Enable Mirror on downstream
3. Check the packet
4. Enable TFTP proxy
5. Check the status of cable modem

Root Cause

In packet header obtaining the tftp server ip was wrong

Suggestions

Check the Status of the CM on MA5633

MA5633(config)#display cable modem all
{ <cr>|cpe<K>|detail<K>|ipv6<K>|sort-index<K>|sort-mac<K>|sort-state<K>|voice<K>||<K> }:

  Command:
          display cable modem all
-------------------------------------------------------------------------------
Idx   MAC            IP               I/F         Status   Prim  Num Ver  DS RX
                                                            SID   CPE      Power
-------------------------------------------------------------------------------
1     94CC-xxxx-BA24 10.x.x.204      0/1/0/U3    DHCP-C   1     0   D2.0 -  
-------------------------------------------------------------------------------
Total: 1
ol: 0, ol-ptd: 0, ol-pt: 0, ol-d: 0, wol: 0, wol-ptd: 0, wol-pt: 0, wol-d: 0,  pol: 0, pol-ptd: 0, pol-pt: 0, pol-d: 0, offline: 0, rej-m: 0, rej-pt: 0, rej-o: 0, init: 0, init-rc: 0, DHCP: 0, DHCP-O: 0, DHCP-R: 0, DHCP-C: 1, REG: 0,
DHCPv6: 0, DHCPv6-A: 0, DHCPv6-R: 0, DHCPv6-C: 0, TFTPv4-S: 0, TFTPv4-C: 0

IP statistics: ipv4-only: 1, ipv6-only: 0, dual-ip: 0, no-ip: 0

Note: 1. Idx is the index of a CM.
       2. The downstream received power is in the unit of dBmV.
       3. In status, "ol" means online, "rej" means reject.
       4. In IP column, "*" means that CM has an IPv6 address.

####
  packet  header obtaining on the downstream // enable mirror
####
MA5633(config)#diagnose

MA5633(diagnose)%%display mirror
  Failure: No mirror exists

MA5633(diagnose)%%


MA5633(diagnose)%%mirror port 0/1/0 meth all

MA5633(diagnose)%%display mirror
  ------------------------------------------------
  Source port      Direction      Destination port
  ------------------------------------------------
       0/1/ 0      all                        meth
  ------------------------------------------------


####
Check the packet
####
in packets the tftp server IP was MA5633 IP

###
Enable TFTP proxy
###

MA5633(config)#display cable tftp proxy 0/1/0
    ----------------------------------
    F/S/P                  Tftp Proxy
    ----------------------------------
    0/1/0                  disable
    ----------------------------------

MA5633(config)#cable tftp proxy 0/1/0 enable

MA5633(config)#display cable tftp proxy 0/1/0
    ----------------------------------
    F/S/P                  Tftp Proxy
    ----------------------------------
    0/1/0                  enable
    ----------------------------------

###Check the status of cable modem###

MA5633(config)#display cable modem all
{ <cr>|cpe<K>|detail<K>|ipv6<K>|sort-index<K>|sort-mac<K>|sort-state<K>|voice<K>||<K> }:

  Command:
          display cable modem all
-------------------------------------------------------------------------------
Idx   MAC            IP               I/F         Status   Prim  Num Ver  DS RX
                                                            SID   CPE      Power
-------------------------------------------------------------------------------
1     94CC-xxxx-BA24 10.x.x.204      0/1/0/U3    ol       1     0   D2.0 -  
-------------------------------------------------------------------------------
Total: 1
ol: 1, ol-ptd: 0, ol-pt: 0, ol-d: 0, wol: 0, wol-ptd: 0, wol-pt: 0, wol-d: 0,  pol: 0, pol-ptd: 0, pol-pt: 0, pol-d: 0, offline: 0, rej-m: 0, rej-pt: 0, rej-o: 0, init: 0, init-rc: 0, DHCP: 0, DHCP-O: 0, DHCP-R: 0, DHCP-C: 0, REG: 0,
DHCPv6: 0, DHCPv6-A: 0, DHCPv6-R: 0, DHCPv6-C: 0, TFTPv4-S: 0, TFTPv4-C: 0

IP statistics: ipv4-only: 1, ipv6-only: 0, dual-ip: 0, no-ip: 0

Note: 1. Idx is the index of a CM.
       2. The downstream received power is in the unit of dBmV.
       3. In status, "ol" means online, "rej" means reject.
       4. In IP column, "*" means that CM has an IPv6 address.

END