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Cisco Bug: CSCum82322 - BBA PPPoE sessions auto cleanup replies for incorrect MAC address

Last Modified

Jan 30, 2017

Products (33)

  • Cisco IOS
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco 7301 Router
  • Cisco 7206 Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco 7206VXR Router
  • Cisco ASR 901-6CZ-F-A Router
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Known Affected Releases

15.2(4)S 15.3(1)S 15.3(2)S 15.3(3)S 15.4(1)S 15.4(2)S 15.4(3)S

Description (partial)

With below config ASR1k will send PADT for PPPoE sessions terminated on another router
if unicast PPPoE frame gets flooded on L2:

bba-group pppoe G
  session auto cleanup

interface interface TenGigabitEthernet0/0/0.100
  encapsulation dot1Q 431 second-dot1q any
  pppoe enable group G

Ambiguous Q-in-Q encapsulation is configured on PPPoE-enabled interface with "any" keyword,
multiple ASR1k routers are used for redundancy and intermediate L2 switch may flood unicast PPPoE frames
to another ASR.
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Bug Details Include

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  • Status
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