Question

2 Internet Route for Cisco 1841

Asked by: spongebob256

Hi,

I am setting up Cisco 1841 with 2 internet connection.

The internal ip is 192.168.7.2

The internet is coming out of the serial interface fine. But howi can I nat to the interface FastEthernet0/0.
Can i use nat for both?
What do i have to add to the below config to make it work.

interface Serial0/1/0
 ip address 66.xxx.xxx.2 255.255.255.252
 ip nat outside
 ip virtual-reassembly
 encapsulation ppp
 service-module t1 remote-alarm-enable

interface FastEthernet0/0
 ip address 206.xxx.xxx.250 252 255.255.255.248
 duplex auto
 speed auto

interface FastEthernet0/1
 ip address 192.168.7.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 duplex auto
 speed auto

ip nat inside source list 1 interface Serial0/1/0 overload

access-list 1 permit 192.168.7.0 0.0.0.255

ip route 0.0.0.0 0.0.0.0 66.xxx.xxx.1
ip route 0.0.0.0 0.0.0.0 206.xxx.xxx.249 25


thanks

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Asked On
2006-02-23 at 11:21:12ID21749103
Tags

1841

,

interface

,

serial

Topic

Miscellaneous Security

Participating Experts
4
Points
500
Comments
9

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Answers

 

by: bob442Posted on 2006-02-23 at 11:48:31ID: 16032435

copy this line

" ip nat inside source list 1 interface Serial0/1/0 overload"   and change the interface "serial" to "fastethernet"

make sure not to replace the current nat rule though

 

by: spongebob256Posted on 2006-02-23 at 12:22:45ID: 16032792

i tried that but it seem to erase the serial one.
it doesn't seem to work

 

by: bob442Posted on 2006-02-23 at 12:33:39ID: 16032919

i thought that would be the case

have you tried adding "ip nat outside" to the interface "fastethernet0/0" ?

 

by: Another-DanPosted on 2006-02-23 at 16:23:00ID: 16034826

If you want to use 2 internet connections and NAT so both S0/1/0 and fa0/0 are 'ip nat outside' and fa0/1 is ip nat inside you need to use a policy map  and define it in your ip nat inside... statement

 

by: spongebob256Posted on 2006-02-23 at 20:49:30ID: 16036062

Another-Dan, can you give an example?

 

by: exploitedjPosted on 2006-02-24 at 07:28:17ID: 16038992

ip nat inside source route-map ISP1 interface s0/1/0 overload                          
ip nat inside source route-map ISP2 interface fa0/0 overload                          

access-list 1 permit 192.168.7.0 0.0.0.255                                      
access-list 2 permit 192.168.7.0 0.0.0.255

route-map ISP1 permit 10
 match ip address 1
 match interface Serial0/1/0

route-map ISP2 permit 10
 match ip address 2
 match interface Fastethernet0/0

interface Fastethernet0/0
ip nat outside

You still may have problems if the uplink to the edge of ISP1 fails, as there is no routing protocol you will not be aware of such a failure.

 

by: zyclonixPosted on 2006-03-27 at 07:37:39ID: 16301076

just add ip nat outside to fastethernet 0/0

20120131-EE-VQP-002

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