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How to setup multiple DSL modems to different ISPs on Cisco 3660
I need to connect 4 DSL modems to 3660 via ethernet. Have 1 0/22 lan segment and then , of course, different ISPs
Further requirement is to point traffic by IP out certaint DSL connections which should be easy.
When I connect a second DSL to the router the traffic stops and the ping time increase from 100ms to >700ms, obviously a loop has been created
The modems are connected via ethernet on different 192.168.x.x /30 segments..
Any ideas on the best way to proceed??
Thanks
Further requirement is to point traffic by IP out certaint DSL connections which should be easy.
When I connect a second DSL to the router the traffic stops and the ping time increase from 100ms to >700ms, obviously a loop has been created
The modems are connected via ethernet on different 192.168.x.x /30 segments..
Any ideas on the best way to proceed??
Thanks
Can you post your config?
ASKER
name xxxxxx
!
boot-start-marker
boot-end-marker
!
enable password 5117711
!
no aaa new-model
!
!
no ip cef
ip domain timeout 1
ip domain name 99k.org
ip name-server 8.8.8.8
ip name-server 208.67.222.222
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
!
!
interface FastEthernet0/0
ip address 192.168.100.199 255.255.252.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface FastEthernet0/1
ip address 192.168.10.2 255.255.255.0
ip accounting output-packets
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface FastEthernet2/0
ip address 192.168.20.2 255.255.255.0
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface FastEthernet2/1
ip address 192.168.30.2 255.255.255.0
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface Ethernet3/0
no ip address
shutdown
half-duplex
!
interface Ethernet3/1
no ip address
shutdown
half-duplex
!
interface FastEthernet4/0
ip address 192.168.40.2 255.255.255.0
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface Serial4/0
description VPN
no ip address
encapsulation frame-relay IETF
!
interface Serial4/0.1 point-to-point
ip address 10.212.249.242 255.255.255.252
ip access-group 101 out
snmp trap link-status
frame-relay interface-dlci 410
!
interface FastEthernet4/1
no ip address
shutdown
duplex auto
speed auto
!
no ip http server
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 192.168.10.1
ip route 8.8.8.8 255.255.255.255 192.168.10.1
ip route 58.71.1.38 255.255.255.255 192.168.40.1
ip route 58.71.2.8 255.255.255.255 192.168.40.1
ip route 123.242.0.0 255.255.0.0 192.168.20.1
ip route 125.5.0.0 255.255.0.0 192.168.20.1
ip route 192.168.1.0 255.255.255.0 10.212.249.241
ip route 202.57.0.0 255.255.0.0 192.168.10.1
ip route 208.43.0.0 255.255.0.0 192.168.30.1
!
ip dns server
!
ip nat inside source list 111 interface FastEthernet4/0 overload
!
access-list 101 deny ip host 192.168.101.100 host 192.168.1.100
access-list 101 permit ip any any
access-list 111 permit ip 192.168.100.0 0.0.3.0 any
snmp-server community public RO
!
!
!
This is my basic config... I was not sure which mechanism to use nor how to begin setting this up. The 4 DSL modems do have bridging options in them, but not sure what the advantage would be over the ethernet version. Each lan side of the modem is connected to an ethernet port and assigned a private address.
Thanks
!
boot-start-marker
boot-end-marker
!
enable password 5117711
!
no aaa new-model
!
!
no ip cef
ip domain timeout 1
ip domain name 99k.org
ip name-server 8.8.8.8
ip name-server 208.67.222.222
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
!
!
interface FastEthernet0/0
ip address 192.168.100.199 255.255.252.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface FastEthernet0/1
ip address 192.168.10.2 255.255.255.0
ip accounting output-packets
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface FastEthernet2/0
ip address 192.168.20.2 255.255.255.0
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface FastEthernet2/1
ip address 192.168.30.2 255.255.255.0
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface Ethernet3/0
no ip address
shutdown
half-duplex
!
interface Ethernet3/1
no ip address
shutdown
half-duplex
!
interface FastEthernet4/0
ip address 192.168.40.2 255.255.255.0
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface Serial4/0
description VPN
no ip address
encapsulation frame-relay IETF
!
interface Serial4/0.1 point-to-point
ip address 10.212.249.242 255.255.255.252
ip access-group 101 out
snmp trap link-status
frame-relay interface-dlci 410
!
interface FastEthernet4/1
no ip address
shutdown
duplex auto
speed auto
!
no ip http server
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 192.168.10.1
ip route 8.8.8.8 255.255.255.255 192.168.10.1
ip route 58.71.1.38 255.255.255.255 192.168.40.1
ip route 58.71.2.8 255.255.255.255 192.168.40.1
ip route 123.242.0.0 255.255.0.0 192.168.20.1
ip route 125.5.0.0 255.255.0.0 192.168.20.1
ip route 192.168.1.0 255.255.255.0 10.212.249.241
ip route 202.57.0.0 255.255.0.0 192.168.10.1
ip route 208.43.0.0 255.255.0.0 192.168.30.1
!
ip dns server
!
ip nat inside source list 111 interface FastEthernet4/0 overload
!
access-list 101 deny ip host 192.168.101.100 host 192.168.1.100
access-list 101 permit ip any any
access-list 111 permit ip 192.168.100.0 0.0.3.0 any
snmp-server community public RO
!
!
!
This is my basic config... I was not sure which mechanism to use nor how to begin setting this up. The 4 DSL modems do have bridging options in them, but not sure what the advantage would be over the ethernet version. Each lan side of the modem is connected to an ethernet port and assigned a private address.
Thanks
Add these lines to your config:
ip nat inside source route-map isp1 interface fast0/1 overload
ip nat inside source route-map isp2 interface fast2/0 overload
ip nat inside source route-map isp3 interface fast2/1 overload
ip nat inside source route-map isp4 interface fast4/0 overload
route-map isp1 permit 10
match ip address 111
match interface fast0/1
!
route-map isp2 permit 10
match ip address 111
match interface fast2/0
route-map isp3 permit 10
match ip address 111
match interface fast2/1
!
route-map isp4 permit 10
match ip address 111
match interface fast4/0
-----
Remove this line as it is no longer required:
'ip nat inside source list 111 interface FastEthernet4/0 overload'
no ip nat inside source list 111 interface FastEthernet4/0 overload
Billy
ip nat inside source route-map isp1 interface fast0/1 overload
ip nat inside source route-map isp2 interface fast2/0 overload
ip nat inside source route-map isp3 interface fast2/1 overload
ip nat inside source route-map isp4 interface fast4/0 overload
route-map isp1 permit 10
match ip address 111
match interface fast0/1
!
route-map isp2 permit 10
match ip address 111
match interface fast2/0
route-map isp3 permit 10
match ip address 111
match interface fast2/1
!
route-map isp4 permit 10
match ip address 111
match interface fast4/0
-----
Remove this line as it is no longer required:
'ip nat inside source list 111 interface FastEthernet4/0 overload'
no ip nat inside source list 111 interface FastEthernet4/0 overload
Billy
ASKER
Thanks,, I'll give it a shot and get back to you quickly...
Thanks again
Thanks again
ASKER CERTIFIED SOLUTION
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ASKER
I had a follow up question which kinda got dropped, so I submitted a second question, which got answered very quickly.
ASKER