Hi All
This is my first post here so please bear with me.
I am trying to connect an L2TP client to Cisco ISR 4321 router (I have previously done this successfully with 29xx series). The client connects, the virtual interface comes up, IP address gets assigned and a route for the assigned ip gets added to the routing table just like I expected it to. When I try to ping the assigned ip fom the ISR router it timesout. When I try to ping the ISR router from the client it times out. If I run "debug ip packet" I see the ping from the client on the ISR and I also see the ISR reply but the ping response does not arrive at the client. So all traffic that goes out from the ISR on the virtual interface seems to just disappear.
I have configured L2TP only (no IPSec).
Here is show run
Current configuration : 4687 bytes
!
! Last configuration change at 12:02:20 UTC Fri Sep 1 2017 by xxx
!
version 15.5
service timestamps debug datetime msec
service timestamps log datetime msec
no platform punt-keepalive disable-kernel-core
!
hostname sssss
!
boot-start-marker
boot-end-marker
!
!
vrf definition Mgmt-intf
!
address-family ipv4
exit-address-family
!
address-family ipv6
exit-address-family
!
!
aaa new-model
!
!
aaa authentication login default local
aaa authentication ppp vpdn local
aaa authorization network default none
!
aaa session-id common
!
!
!
subscriber templating
multilink bundle-name authenticated
vpdn enable
!
vpdn-group L2TP
! Default L2TP VPDN group
! Default PPTP VPDN group
accept-dialin
protocol l2tp
virtual-template 1
no l2tp tunnel authentication
!
!
license udi pid ISR4321/K9 sn Fx
!
spanning-tree extend system-id
!
username xxxxx password 0 xxxxxxxx
!
redundancy
mode none
!
!
vlan internal allocation policy ascending
!
!!
!
interface Loopback5
ip address 172.16.254.1 255.255.255.0
!
!
interface GigabitEthernet0/0/0
description Connected to inet
ip address x.x.x.x 255.255.255.224
negotiation auto
!
interface GigabitEthernet0/0/1
description Connected to xxx
ip address xxxxxxx
negotiation auto
!
interface GigabitEthernet0
vrf forwarding Mgmt-intf
no ip address
negotiation auto
!
interface Virtual-Template1
ip unnumbered GigabitEthernet0/0/0
ip mtu 1460
no peer default ip address
ppp mtu adaptive
ppp authentication chap vpdn
!
interface Vlan1
no ip address
shutdown
!
ip forward-protocol nd
no ip http server
no ip http secure-server
ip route 0.0.0.0 0.0.0.0 x.x.x.x
!
control-plane
!
!
line con 0
stopbits 1
line aux 0
stopbits 1
line vty 0 4
transport input telnet
!
!
end
Any help would be greatly appreciated.
Thanks
Robert
