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Cisco Bug: CSCta34831 - CEF is broken when running L2TP over PPPoE with VPN

Last Modified

Feb 01, 2017

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)


PPPoE-1 ----------- LAC-Dailer(pppoe) ---------- LAC -------------- LNS
                                                                            <<------  L2TP  ---->> 
                                        <<-------------------  L2TP  --------------------->>

getting 50% packet lost when ping PPPoE-1 from the device connected behind the LNS. Ping with record route option works fine. Getting 100% ping success rate when ping from the LNS.


customer is running L2TP over PPP with VPN enable
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