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Cisco Bug: CSCup57197 - DHCP stops working due to memory leak

Last Modified

Jul 21, 2018

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

5.1.1.BASE

Description (partial)

Symptom:
DHCP process will suddenly stop working causing all bindings to be flushed: 

RP/0/RSP1/CPU0:router#show dhcp ipv4 proxy bind summary 
 
Total number of clients: 0
 
     STATE                |     COUNT     |
------------------------------------
  INIT                    |            0  |
  INIT_DPM_WAITING        |            0  |
  SELECTING               |            0  |
  REQUESTING              |            0  |
  REQUEST_INIT_DPM_WAITING|            0  |
  ACK_DPM_WAITING         |            0  |
  BOUND                   |            0  |
  RENEWING                |            0  |
  INFORMING               |            0  |
  REAUTHORIZE             |            0  |
  DISCONNECT_DPM_WAIT     |            0  |
  ADDR_CHANGE_DPM_WAIT    |            0  |
  DELETING                |            0  |
  DISCONNECTED            |            0  |
  RESTARTING              |            0  |

Conditions:
This issue is triggered by having a session idle timeout smaller than half the DHCP lease timer

dynamic-template
   type ipsubscriber TEMPLATE
       timeout idle 1800         <<<<<<<
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