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Cisco Bug: CSCvi81348 - SM-ES3G-24-P denied power beyond 480Watt by Cisco3945e chassis

Last Modified

Aug 07, 2018

Products (92)

  • Cisco 3900 Series Integrated Services Routers
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 812 CiFi Integrated Services Router
  • Cisco 886VAG 3G Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco 819 Hardened Integrated Services Router
  • Cisco C897VA Integrated Services Router
  • Cisco 1905 Serial Integrated Services Router
  • Cisco 898 Secure G.SHDSL EFM/ATM with Multi-Mode 4G LTE ISR Router
  • Cisco 888W Integrated Services Router
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Known Affected Releases

15.5(3)M

Description (partial)

Symptom:
1.       The customer setup consists of a CISCO3945-CHASSIS with 2 PS PWR-3900-POE  in boost mode ( no power inline redundant) , there are 3 ESM modules inserted on the router- 2 SM-ES3G-24-P on slot 1 and 2 , and SM-D-ES3G-48-P on slot 4.
2.       After allocating approx. 480Watt of power, when more poe devices are connected on modules in slot 1 and 2, we get power denied:
 
%ILPOWER-7-DETECT: Interface Gi0/11: Power Device detected: IEEE PD
%ILPOWER-5-ILPOWER_POWER_DENY: Interface Gi0/11: inline power denied
 
3.       But If same POE devices are connected to empty slots on module 4, there is no such issue.
4.       The modules in slot 1 and 2 don't even get power when module 4 is removed from the router.

Conditions:
When the router has the POE supplies in boost mode and has POE devices connected to 24 ports ES modules.
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