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Cisco Bug: CSCvv94743 - Data Plane fails over L2TPv3 while disabling VLAN limit restrictions with ASR1002-HX

Last Modified

Oct 14, 2020

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

When ever L2 Xconnect PW is UP, and if we attempt to remove the VLAN restriction from subslot 0/1,  using below CLI

hw-module subslot 0/1 ethernet vlan unlimited

Immediately Data plane traffic will get blackholed.

interface TenGigabitEthernet0/1/0.1000
 description *** Extension to  via L2TP tunnel ***
 encapsulation dot1Q 1000
 xconnect 1000 encapsulation l2tpv3 pw-class L2TPv3

ASR1002-HX#sh xconn all
Legend:    XC ST=Xconnect State  S1=Segment1 State  S2=Segment2 State
  UP=Up       DN=Down            AD=Admin Down      IA=Inactive
  SB=Standby  HS=Hot Standby     RV=Recovering      NH=No Hardware
XC ST  Segment 1                         S1 Segment 2                         S2
UP pri   ac Te0/1/0.1000:1000(Eth VLAN)    UP l2tp              UP

This issue is only noticed with the following combination of hardware  Need to enable back VLAN limitation, in order to resume the traffic across L2 Xconnect circuits


" no hw-module subslot 0/1 ethernet vlan unlimited"


The following CLI "hw-module subslot 0/1 ethernet vlan unlimited", will have a traffic impact on L2 Xconnect circuits
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