Question

Two Internet connections + Cisco 1841

Asked by: joe90kane

Hi,

I have two broadband connections,

1x Wireless Broadband connection -- RJ45 connection (BB1)
1x ADSL --> RJ11 connection (BB2)

I have both connected and working but I cant figure out how to use the BB1 connection as the primary and if it goes down to automatically failover to the BB2 connection.

My current config only works for BB2 - if I try to disable int Dialer 1 it blocks everything the Int FastEthernet0/1 doesnt work.

Hope that makes sense.

Thanks, Joe

!
version 12.4
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname RTR
!
boot-start-marker
boot-end-marker
!
no logging buffered
logging monitor notifications
enable password 7 123123123
!
no aaa new-model
!
resource policy
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
ip subnet-zero
ip cef
!
!
no ip dhcp use vrf connected
!
ip dhcp pool tester
   import all
   network 192.168.4.0 255.255.255.0
   default-router 192.168.4.253
   dns-server 192.168.1.50 192.168.1.48
   netbios-name-server 192.168.1.50
   lease 0 2
!
!
ip name-server 91.91.91.91
ip name-server 91.92.92.92
ip name-server 85.85.85.85
ip name-server 85.86.86.86
vpdn enable
!
!
!
!
!
crypto isakmp policy 11
 hash md5
 authentication pre-share
 group 2
crypto isakmp key vpnkey address 80.80.80.80
crypto isakmp key vpnkey address 89.89.89.89
!
!
crypto ipsec transform-set tester esp-des esp-md5-hmac
!
crypto map VPN 11 ipsec-isakmp
 set peer 80.80.80.80
 set peer 89.89.89.89
 set transform-set tester
 match address 120
!
!
!
interface FastEthernet0/0
 ip address 192.168.4.253 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 91.91.91.91 255.255.255.252
 ip nat outside
 ip virtual-reassembly
 duplex auto
 speed auto
 crypto map VPN
!
interface ATM0/0/0
 no ip address
 no atm ilmi-keepalive
 dsl operating-mode auto
 pvc 8/35
  encapsulation aal5snap
  pppoe-client dial-pool-number 1
 !
!
interface Dialer0
 no ip address
!
interface Dialer1
 mtu 1492
 ip address negotiated
 ip nat outside
 ip virtual-reassembly
 encapsulation ppp
 dialer pool 1
 dialer remote-name redback
 dialer-group 1
 ppp authentication pap chap callin
 ppp chap hostname admin@admin.com
 ppp chap password 7 123123123
 crypto map VPN
!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
ip route 0.0.0.0 0.0.0.0 FastEthernet0/1 254
!
ip http server
ip http secure-server
ip nat pool BB1VPN 91.91.91.91 91.91.91.91 netmask 255.255.255.255
ip nat pool BB2VPN 213.0.0.0 213.0.0.0 netmask 255.255.255.255
!
access-list 1 permit 192.168.4.0 0.0.0.255
access-list 120 permit ip 192.168.4.0 0.0.0.255 192.168.1.0 0.0.0.255
dialer-list 1 protocol ip permit
route-map nonat permit 10
 match ip address 130
!
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0
 password 7 123123123
 login
line vty 1
 password 7 1231231231
 login
line vty 2 4
 login
!
end

                                  
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Asked On
2009-11-04 at 07:50:57ID24871235
Topics

Networking Hardware Firewalls

,

Cisco PIX Firewall

,

Network Routers

Participating Experts
2
Points
500
Comments
5

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Answers

 

by: rochey2009Posted on 2009-11-04 at 08:13:21ID: 25740801

change the following

ip route 0.0.0.0 0.0.0.0 FastEthernet0/1 254

to

ip route 0.0.0.0 0.0.0.0 <next-hop ip address> 254

 

by: joe90kanePosted on 2009-11-04 at 08:39:17ID: 25741125

Thanks Rochey, I will test this out this evening.

If this works wont it bring both interfaces & VPN's up at the same time. I remember this being another issue.
Is this anyway to hold one of the VPN's or Ints to come up if the other fails.

 

by: rochey2009Posted on 2009-11-04 at 09:11:49ID: 25741520

the second default route has an administrative distance of 254 so it shouldn't use it until the first default route is removed from the routing table.

 

by: ludo_friendPosted on 2009-11-08 at 16:51:09ID: 25772795

mmm, the described solution won't work under all down conditions (sometimes the dialer interface will still appear as up), you really need to be using ip sla to achieve this. if I've understood correctly you want the ADSL to be operational until failure when the wireless kicks in?

something along the lines of...

ip sla 1
 icmp-echo 4.2.2.2  source-interface Dialer1
 timeout 500
 frequenccy 3
ip sla schedule 1 start-time now life forever
track 1 rtr 1 reachability

!replace your route commands with the following
ip route 0.0.0.0 0.0.0.0 Dialer 1 track 1
ip route 0.0.0.0 0.0.0.0 <nexthop ip via fe0/1> 10

4.2.2.2 can be replaced with a valid icmp echo replying ip address outside of your network. this will be the condition for the route swapping over.

 

by: ludo_friendPosted on 2009-11-08 at 16:51:52ID: 25772796

20120131-EE-VQP-002

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