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Cisco Bug: CSCul24682 - L2TP LNS uses unnegotiated magic number

Last Modified

Apr 17, 2019

Products (13)

  • Cisco IOS
  • Cisco 7301 Router
  • Cisco 7206 Router
  • Cisco 7204 Router
  • Cisco 7206VXR Router
  • Cisco 7202 Router
  • Cisco 7600 Series Route Switch Processor 720 with Multilayer Switch Feature Card
  • Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks
  • Cisco 7600 Series Supervisor Engine 32 with Multilayer Switch Feature Card
  • Cisco 7200 Series NPE-G2 Network Processing Engine
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Known Affected Releases

12.2(33)SRC5 15.1(3)S3

Description (partial)

Symptom: L2TP LNS puts a non-negotiated magic number to LCP packets. The PPPoE client may terminate the session prematurely due to the unknown magic number.
Conditions: This symptom occurs when L2TP LAC does not negotiate the magic number with the PPPoE client and L2TP LNS does not renegotiate options with the PPPoE client.
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