i have configure ASR 1001 as LNS router and the router coudn't establish more than 1600 session and in the debug vpdn error i got the following message
Mar 7 23:58:10.339: VPDN Failed to get session from socket handle 9B000070
Mar 7 23:58:10.340: VPDN Failed to get session from socket handle 3D010376
Mar 7 23:58:14.779: VPDN Failed to get session from socket handle 810000AE
am running the latest IOS
Cisco IOS XE Software, Version 03.11.01.S - Standard Support Release
Cisco IOS Software, ASR1000 Software (X86_64_LINUX_IOSD-UNIVERSAL-M), Version 15.4(1)S1, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Sat 01-Mar-14 11:59 by mcpre
any idea????