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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

16.6.6

Description (partial)

Symptom:
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
</div>
Crashinfo and core file should have been generated for the crash.

Conditions:
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
                0000.0000.0000
</div>
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
</div>
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
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