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Nihon Kohden ECG devices doesn't get IP address from the DHCP Server after Firmware upgrade

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TitleNihon Kohden ECG devices doesn't get IP address from the DHCP Server after Firmware upgrade
Symptoms
  • Nikon Kohden ECG device doesn't obtain a IP address from the DHCP Server
Environment
  • IdentiFi
  • AP37xx
  • AP38xx
  • AP39xx
  • USB-WLAN-Stick - ew-7811
  • NIkon Kohden- ECG-2350



 
Cause
  • ARP learning doesn't work
  • AP can only learn the IP address from ARP but not from IP packest unlike laptops
Resolution
  • Upgrade to 9.21.13
  • Upgrade to 10.11.x
Additional notes
  • wns0012835
  • Heart monitor would send arp packet reply to the ping
  • Ip would be learnt base on the arp request
  • In 9.21 AP can onyl learn the IP address from ARP but not from the IP packets unlike laptops

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