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Cisco Bug: CSCum33167 - When PPPoE-IA is enabled, switch fwds PADR/PADT pkts to untrusted port.

Last Modified

Jan 31, 2017

Products (21)

  • Cisco ME 2600X Series Ethernet Access Switches
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901-6CZ-FT-A Router
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Known Affected Releases


Description (partial)

Symptom: When PPPoE-IA is enabled, a Cisco switch forwards PADR/PADT packets to an untrusted port.
Conditions: This symptoms occurs under the following conditions:

-Configure PPPoE IA globally on node 1.
-Configure service instance on interface gig0/1,gig 0/2 and gig 0/3.
-Configure PPPoE IA on the interface and on the service instance.
-Configure gig 0/1 and gig 0/3 as an untrusted port and gig 0/2 as a trusted port.
-Send a PADI Packet from client 1 and send a PADO packet from the server.

The PADO packet is received on client 2, but it should be received only on client 1.
Send a PADR packet from client 1, client 2 also receives the packet. But it should not receive the packet.
The PADR/PADT packet should be forwarded only to a trusted port.
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