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Cisco Bug: CSCvu40093 - Crash when tearing down a PPPoE client session

Last Modified

Sep 10, 2020

Products (8)

  • Cisco IOS
  • Cisco 4221 Integrated Services Router
  • Cisco 4431 Integrated Services Router
  • Cisco 4321 Integrated Services Router
  • Cisco 4331 Integrated Services Router
  • Cisco Cloud Services Router 1000V
  • Cisco 4351 Integrated Services Router
  • Cisco 4451-X Integrated Services Router

Known Affected Releases


Description (partial)

Device crashed after making a PPPoE client session be torn down while running commands like the following.
<div style="font-family:courier;white-space:pre;">
no pppoe-client dial-pool-number 1
no pppoe enable group global
Crashinfo and core file should have been generated for the crash.

The device had established PPPoE sessions, and one dialer is bounded twice in the same interface, as in following example.
<div style="font-family:courier;white-space:pre;">
Uniq ID  PPPoE  RemMAC          Port                    VT  VA         State
           SID  LocMAC                                      VA-st      Type
    N/A     85  2c5a.0f9b.ff00  Gi0/0/0.7               Di1 N/A        PADISNT
                6412.25a2.f450  VLAN:   7                   
    N/A      0  0000.0000.0000  Gi0/0/1.7               Di1 N/A        PADISNT
Through configuration commands, the PPPoE session for this Dialer is attempted to be torn down twice:
<div style="font-family:courier;white-space:pre;">
interface gi0/0/0.7
 no pppoe enable
 no pppoe-client dial-pool-number 1
interface gi0/0/0
 no pppoe enable
 no pppoe-client dial-pool-number 1
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