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COM cannot backup ERS 5520

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Information

 
TitleCOM cannot backup ERS 5520
Symptoms
COM - BCM (Bulk Configuration Manager) v3.1: backup problem with ERS 5500 series switches whereas backup works fine with ERS 8800s.

When backup job is initiated  from COM - BCM following messages are on ERS 5500 switch :even though both switch and COM server are reachable from each other :

Error! TFTP connection error! Invalid TFTP server IP Address or TFTP Server down.


 
Environment
  • COM legacy
  • COM Plus
Cause
The issue is with customer's datacenter firewall which blocking TFTP traffic between ERS 5500 switches and COM server. The reason for why backup works with ERS 8800 because BCM uses FTP for ERS 8000s for backup job not TFTP and FTP is allowed on the firewall.
Resolution
Customer allowed TFTP traffic on the firewall.
Additional notes

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