11-03-2008 11:07 AM
I have a Cisco 837 ADSL out in the field. I am migrating it to a new VPN concentrator. The VPN comes up fine and the network is reachable, for about 7 minutes, then the line protocol on the Virtual-Access interface changes to down and the dialer looses its public IP address. If I reload to the old configuration with the old peer, the Dialer gets its public IP back and everything works fine. Is there something anyone can think of that would cause the public IP address to be lost after changing VPN peer? It's wierd because the new VPN comes up and everything works fine for a few minutes before completely breaking because the dialer looses its public IP:
Oct 31 14:46:01.103: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is ON
Oct 31 14:46:17.071: %SYS-5-CONFIG_I: Configured from console by user on vty0
(192.168.131.101)
Oct 31 14:53:30.089: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Acc
ess2, changed state to down
.Oct 31 15:06:10.243: Di1 DDR: dialer shutdown complete
.Oct 31 15:06:10.247: %LINK-5-CHANGED: Interface Virtual-Access2, changed state
to administratively down
.Oct 31 15:06:10.247: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1
.Oct 31 15:06:11.231: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state t
o up
.Oct 31 15:06:11.235: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state t
o down
.Oct 31 15:06:12.243: %LINK-5-CHANGED: Interface Dialer1, changed state to admin
istratively down
.Oct 31 15:06:29.848: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state t
o up
.Oct 31 15:06:29.852: %DIALER-6-BIND: Interface Vi2 bound to profile Di1
.Oct 31 15:06:31.844: %LINK-3-UPDOWN: Interface Dialer1, changed state to up
11-03-2008 11:23 AM
Ryan,
Can you post the configuration from the router.
Regards,
Arul
11-03-2008 11:58 AM
When migrating to the new concentrator I add the following:
crypto isakmp key test address 21.118.135.77
ip access-list extended newvpn
permit ip 10.1.10.0 0.0.0.255 any
permit ip 10.1.100.0 0.0.0.255 any
crypto map csk 10 ipsec-isakmp
set peer 21.x.135.77
set transform-set vpn-set
match address newvpn
and change the crypto map on the dialer interface from:
crypto map vpn-site2site
To:
crypto map newvpn
I also remove the ip nat statements from dialer and ethernet interface and it all works fine for a few mintues.
Below is the working config:
Current configuration : 3747 bytes
!
! No configuration change since last restart
! NVRAM config last updated at 10:59:16 CST Mon Nov 3 2008 by user
!
version 12.3
no service pad
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime
service password-encryption
!
hostname router
!
boot-start-marker
boot-end-marker
!
memory-size iomem 5
no logging console
!
clock timezone CST -6
clock summer-time CST recurring 2 Sun Mar 2:00 1 Sun Nov 2:00
aaa new-model
!
!
aaa authentication login default group radius local
aaa authorization exec default if-authenticated group radius local
aaa accounting exec default start-stop group radius
aaa session-id common
ip subnet-zero
!
!
!
!
ip tcp synwait-time 5
ip cef
no ip domain lookup
ip ftp username anonymous
ip ips po max-events 100
no ftp-server write-enable
!
!
!
!
!
crypto isakmp policy 10
encr 3des
hash md5
authentication pre-share
group 2
crypto isakmp key test address 158.215.77.50
crypto isakmp invalid-spi-recovery
crypto isakmp keepalive 60
!
!
crypto ipsec transform-set vpn-set esp-3des esp-md5-hmac
!
crypto map vpn-site2site 10 ipsec-isakmp
set peer 158.215.77.50
set transform-set vpn-set
match address vpn
!
!
!
interface Ethernet0
ip address 10.1.10.3 255.255.255.0
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1460
hold-queue 100 out
!
interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode auto
pvc 8/35
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
!
interface FastEthernet1
no ip address
duplex auto
speed auto
!
interface FastEthernet2
no ip address
duplex auto
speed auto
!
interface FastEthernet3
no ip address
duplex auto
speed auto
!
interface FastEthernet4
no ip address
duplex auto
speed auto
!
interface Dialer1
ip address negotiated
no ip proxy-arp
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication pap chap callin
ppp chap hostname
ppp chap password
ppp pap sent-username
crypto map vpn-site2site
!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
ip route 10.1.0.0 255.255.0.0 10.1.10.1
!
ip http server
no ip http secure-server
!
ip nat inside source list nat interface Dialer1 overload
!
ip radius source-interface Ethernet0
!
ip access-list extended nat
ip access-list extended vpn
deny ip 10.1.0.0 0.0.255.255 10.1.0.0 0.0.255.255
permit ip 10.1.0.0 0.0.255.255 10.0.0.0 0.255.255.255
!
control-plane
!
!
line con 0
no modem enable
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
transport preferred all
transport input all
transport output all
!
scheduler max-task-time 5000
ntp clock-period 17180101
end
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