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problem with l2tp connection


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#1 talent pk

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Posted 11 December 2012 - 02:22 AM

One of the site router is struggling to bring up L2tp Connection. Here is the debug output on
Main Router

.Dec 10 16:17:32.657: L2TP _____:_____: I SCCRQ, flg TLS, ver 2, len 143
.Dec 10 16:17:32.657: L2TP _____:_____: IETF v2:
.Dec 10 16:17:32.657: L2TP _____:_____: Protocol Version 1, Revision 0
.Dec 10 16:17:32.657: L2TP _____:_____: Framing Cap both(0x3)
.Dec 10 16:17:32.657: L2TP _____:_____: Bearer Cap both(0x3)
.Dec 10 16:17:32.657: L2TP _____:_____: Firmware Ver 0x1130
.Dec 10 16:17:32.661: L2TP _____:_____: Hostname "AHDAL_ROUTER"
.Dec 10 16:17:32.661: L2TP _____:_____: Vendor Name
.Dec 10 16:17:32.661: L2TP _____:_____: "Cisco Systems, Inc."
.Dec 10 16:17:32.661: L2TP _____:_____: Assigned Tunnel I 58029
.Dec 10 16:17:32.661: L2TP _____:_____: Rx Window Size 100
.Dec 10 16:17:32.661: L2TP _____:_____: Challenge [16]
.Dec 10 16:17:32.661: L2TP _____:_____: 0x59DCE90CDCBDDDD1FF5D5E802D8579ED
.Dec 10 16:17:32.665: L2TP _____:_____: PPPoE Relay Forward Capable
.Dec 10 16:17:32.665: L2TP _____:_____: Cisco v2:
.Dec 10 16:17:32.665: L2TP _____:_____: PPPoE Relay Forward Capable
.Dec 10 16:17:32.665: L2TP _____:_____:
.Dec 10 16:17:32.665: L2TP tnl 4529 :63987: Tunnel exists, must be a duplicate SCCRQ
.Dec 10 16:17:32.665: L2TP _____:_____: SCCRQ: processing failed
.Dec 10 16:17:32.665: L2TP _____:_____: SCCRQ: dropping packet
.Dec 10 16:17:37.637: L2TP _____:_____:
.Dec 10 16:17:37.637: L2TP _____:_____: I StopCCN, flg TLS, ver 2, len 66
.Dec 10 16:17:37.637: L2TP _____:_____: IETF v2:
.Dec 10 16:17:37.637: L2TP _____:_____: Result Code
.Dec 10 16:17:37.637: L2TP _____:_____: Request to clear control connection(2)
.Dec 10 16:17:37.637: L2TP _____:_____: Error code
.Dec 10 16:17:37.637: L2TP _____:_____: Vendor specific(6)
.Dec 10 16:17:37.641: L2TP _____:_____: Optional msg
.Dec 10 16:17:37.641: L2TP _____:_____: "Tunnel setup timeout"
.Dec 10 16:17:37.641: L2TP _____:_____: Assigned Tunnel I 58029
.Dec 10 16:17:37.641: L2TP _____:_____: Cisco v2:
.Dec 10 16:17:37.641: L2TP _____:_____: Vendor Error Code
.Dec 10 16:17:37.641: L2TP _____:_____: Error code
.Dec 10 16:17:37.641: L2TP _____:_____: Tunnel shut(1)
.Dec 10 16:17:37.645: L2TP _____:_____:
.Dec 10 16:17:40.621: L2TP _____:_____: I SCCRQ, flg TLS, ver 2, len 143
.Dec 10 16:17:40.625: L2TP _____:_____: IETF v2:
.Dec 10 16:17:40.625: L2TP _____:_____: Protocol Version 1, Revision 0
.Dec 10 16:17:40.625: L2TP _____:_____: Framing Cap both(0x3)
.Dec 10 16:17:40.625: L2TP _____:_____: Bearer Cap both(0x3)
.Dec 10 16:17:40.625: L2TP _____:_____: Firmware Ver 0x1130
.Dec 10 16:17:40.625: L2TP _____:_____: Hostname "AHDAL_ROUTER"
.Dec 10 16:17:40.625: L2TP _____:_____: Vendor Name
.Dec 10 16:17:40.625: L2TP _____:_____: "Cisco Systems, Inc."
.Dec 10 16:17:40.629: L2TP _____:_____: Assigned Tunnel I 58029
.Dec 10 16:17:40.629: L2TP _____:_____: Rx Window Size 100
.Dec 10 16:17:40.629: L2TP _____:_____: Challenge [16]
.Dec 10 16:17:40.629: L2TP _____:_____: 0x59DCE90CDCBDDDD1FF5D5E802D8579ED
.Dec 10 16:17:40.629: L2TP _____:_____: PPPoE Relay Forward Capable
.Dec 10 16:17:40.629: L2TP _____:_____: Cisco v2:
.Dec 10 16:17:40.629: L2TP _____:_____: PPPoE Relay Forward Capable
.Dec 10 16:17:40.633: L2TP _____:_____:
.Dec 10 16:17:40.633: L2TP _____:_____: I StopCCN, flg TLS, ver 2, len 66
.Dec 10 16:17:40.633: L2TP _____:_____: IETF v2:
.Dec 10 16:17:40.633: L2TP _____:_____: Result Code
.Dec 10 16:17:40.633: L2TP _____:_____: Request to clear control connection(2)
.Dec 10 16:17:40.633: L2TP _____:_____: Error code
.Dec 10 16:17:40.633: L2TP _____:_____: Vendor specific(6)
.Dec 10 16:17:40.637: L2TP _____:_____: Optional msg
.Dec 10 16:17:40.637: L2TP _____:_____: "Tunnel setup timeout"
.Dec 10 16:17:40.637: L2TP _____:_____: Assigned Tunnel I 58029
.Dec 10 16:17:40.637: L2TP _____:_____: Cisco v2:
.Dec 10 16:17:40.637: L2TP _____:_____: Vendor Error Code
.Dec 10 16:17:40.637: L2TP _____:_____: Error code
.Dec 10 16:17:40.637: L2TP _____:_____: Tunnel shut(1)
.Dec 10 16:17:40.641: L2TP _____:_____:
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#2 talent pk

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Posted 11 December 2012 - 02:23 AM

have played with timeout settings retransmission settings (hardcoded same on both sides but everything seems to go wrong)
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#3 talent pk

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Posted 11 December 2012 - 02:29 AM

Tunnel exists, must be a duplicate SCCRQ

any workaround for this type of situation ?
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