Preview Tool

Cisco Bug: CSCuj30572 - Router crash @ eigrp_pfr_get_drdb with PFR and OER

Last Modified

Apr 17, 2019

Products (9)

  • Cisco IOS
  • Cisco 7301 Router
  • Cisco 7206 Router
  • Cisco 7206VXR Router
  • Cisco 7204 Router
  • Cisco 7202 Router
  • Cisco 7200 Series NPE-G2 Network Processing Engine
  • Cisco 7204VXR Router
  • Cisco 7201 Router

Known Affected Releases


Description (partial)

Symptom: With EIGRP and PFR configured, Router crashes after giving following EIGRP messages.
000111: Sep 17 09:08:33.331: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor (Tunnel502) is down: Peer Termination received
000112: Sep 17 09:08:33.347: %DUAL-3-INTERNAL: EIGRP-IPv4 1: Internal Error -Traceback= 319D4CB4z 319EC5E4z 319EC7C8z 319E4950z 319EA760z 31A25008z 32C23084z 32C23068z
Conditions:PFR, OER and EIGRP need to be configured.

Say RouterUnderTest has two EIGRP Peers HUB1 and HUB2. (Given metrics are only for illustration)
When EIGRP has a Prefix with 3 different Paths installed in following Order
DRDB1  NH - HUB1, Metric 36571392 / 0          (Installed by PFR)
DRDB2  NH - HUB2, Metric 58322432 / 409600     ( x Hops away learnt from RouterX)
DRDB3  NH - HUB1, Metric 538004992/500409600   (y Hops away learnt from Router Y)

With these initial conditions, if Neighbor ship with Router Y goes down, Both PFR and EIGRP try to delete DRDB3 Which results in inconsistent data structures with Memory corruption. Any further access to Memory will result in Crash.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.