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Emergency Responder switch port discovery improvement


Cisco Emergency Responder (CER) uses SNMP to gather information from switches that IP phones are connected to. In customers' experience, this process is slow, fragile, and error prone. Several serious bugs are cataloged related to this process regarding crypto and IPv6 alone.


Leverage phone registrations into CUCM, which is a distributed push of information instead of a centralized pull.


Phones would include their CDP information as part of their registration with CUCM. This would include the neighbor switch and switch port.

CER would query CUCM for phone registrations, which would include the new information described above.

CER would link the defined switches, their ports, and ERLs with the phone neighbor details, avoiding SNMP scans.

  • Guest
  • Apr 16 2024
  • Future consideration