11-30-2007 03:34 AM - edited 03-03-2019 07:44 PM
Hello.
I have two DSL in my office. I want a router into which I can plug the two internet connections. The best way would be a load balancing between the two DSL.
I need a system that if one DSL stops working, the router automaticly uses the other.
The most important thing is that the office always has internet.
Which system should I use? Router, Router-modem, swtich...? And which model?
Thanks.
11-30-2007 04:27 AM
Hi,
Are the two dsl's from the same provider?
If yes they must aggree on the the configuration.
If not, and you have services that has to be reached from Internett, you cannot get full redundancy. The public IP adresses belongs to the ISP and cannot be routed in the AS of your other ISP.
Use NAT overloading and HSRP, then you will always get user access to Internet.
HTH
BR
Bjornarsb
11-30-2007 05:04 AM
Thanks for your reply.
The dsl's are from diferent providers.
I have been reading about HSRP, and I think this will be good.
Which cisco router have this functionality?
Thanks.
11-30-2007 06:50 AM
Hi,
871 or 1800 series.
BR,
Bjornarsb
12-04-2007 05:46 PM
Dear All,
I just saw your conversation and interesting for me,Could you give me simple configuration and some documentation please?Because i tried to find simple configuration but don't have.
This is my eamil: rechard_david@yahoo.com
Thank your for your help!
Best Regards,
Rechard
12-05-2007 12:33 AM
Hi,
You could start looking at this example:
http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a0080093f2c.shtml
and this:
http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00800945bf.shtml#conf5
Keep in mind that the configuration depends on if you have Provider Independent Addresses or not.
HTH
BR,
Bjornarsb
12-06-2007 06:59 PM
Dear Bjornarsb,
I'm glad to hear your reply and thank you!!
so i would like to ask you one question i had one 1841 and 3 interface Ethernet and i connect like this :
ISP 1 connect to int f0/0 , ISP 2 connect to f0/1 and int f0/3 connect to Switch(LAN).
i would like configure redundancy i mean when ISP one down, ISP 2 automatic up.
So i not clear about configuration Could give me that i told you above.
Hope to see you reply !!!
Best Regards,
Rechard
12-07-2007 12:50 AM
Hi,
Do you have private or public IP on your LAN Interface ?
BR,
Bjornarsb
12-07-2007 01:18 AM
Dear Bjornarsb,
Sure, i had. 2 ISP use public ip and Lan is private IP.
Could you tell me 2 option?
1-If ISP 1 down switch automatically to ISP 2.
2-Use both ISP i mean ISP 1 50% and ISP 2 50%.
Could you give me some document please?
Best Regards,
Rechard
12-07-2007 01:46 AM
Hi,
If I've understood your need, try this:
!
interface FastEthernet0/0
description ## LAN ###
ip address 192.168.253.1 255.255.255.0
ip nat inside
!
interface FastEthernet0/1
description ## ISP 1 ###
ip address 193.1.1.1 255.255.255.252
ip nat outside
!
interface FastEthernet0/2
description ## ISP 2 ###
ip address 193.2.2.1 255.255.255.252
ip nat outside
ip nat inside source list 102 interface FastEthernet0/1 overload
ip nat inside source list 102 interface FastEthernet0/2 overload
access-list 102 permit ip 192.168.253.0 0.0.0.255 any
50% each
ip route 0.0.0.0 0.0.0.0 193.1.1.2
ip route 0.0.0.0 0.0.0.0 193.2.2.2
ISP2 just standby
ip route 0.0.0.0 0.0.0.0 193.1.1.2
ip route 0.0.0.0 0.0.0.0 193.2.2.2 200
BR,
Bjornarsb
12-07-2007 02:53 AM
Dear Bjornarsb,
Thank you very much for your help!!
i will be test it.You mean i if you configure command bellow is use ISP1 50% and ISP2 50%, right?
!
interface FastEthernet0/0
description ## LAN ###
ip address 192.168.253.1 255.255.255.0
ip nat inside
!
interface FastEthernet0/1
description ## ISP 1 ###
ip address 193.1.1.1 255.255.255.252
ip nat outside
!
interface FastEthernet0/2
description ## ISP 2 ###
ip address 193.2.2.1 255.255.255.252
ip nat outside
ip nat inside source list 102 interface FastEthernet0/1 overload
ip nat inside source list 102 interface FastEthernet0/2 overload
access-list 102 permit ip 192.168.253.0 0.0.0.255 any
50% each
ip route 0.0.0.0 0.0.0.0 193.1.1.2
ip route 0.0.0.0 0.0.0.0 193.2.2.2
---------------------------------------
And i use this command mean ISP2 Stanby, right?
!
interface FastEthernet0/0
description ## LAN ###
ip address 192.168.253.1 255.255.255.0
ip nat inside
!
interface FastEthernet0/1
description ## ISP 1 ###
ip address 193.1.1.1 255.255.255.252
ip nat outside
!
interface FastEthernet0/2
description ## ISP 2 ###
ip address 193.2.2.1 255.255.255.252
ip nat outside
ip nat inside source list 102 interface FastEthernet0/1 overload
ip nat inside source list 102 interface FastEthernet0/2 overload
access-list 102 permit ip 192.168.253.0 0.0.0.255 any
ip route 0.0.0.0 0.0.0.0 193.1.1.2
ip route 0.0.0.0 0.0.0.0 193.2.2.2 200
Best Regards,
Rechard
12-07-2007 02:56 AM
yes. and let me know how it goes :)
12-09-2007 11:34 PM
Dear Bjornarsb,
Ok,let me test.
I will let you know. now i met the problem with module Hwic-1FE after i fix already i will update you to you.
Thank you for your support!!!
Besst Regards,
Rechard
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: