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Redundant Routers Connection 2 ISP

amorsico7
Level 1
Level 1

Current ConnectionCurrent CONFIG.GIFPLANNED CONNECTIONplanned setup.GIF

Hello Guru's 

I need your help about this network diagram,

 

Currently we have two ISP provider, (ISP-1 ISP-2 as shown in the drawing ) and functioning separately.

 

To optimize both ISP I want to make it redundant.

My plan set up is to connect router 0 and router 2 as well as Router 1 and Router 3 so that when one hardware ( router ) fail there are still a backup.

 

I am not very technical person about networking that’s why I decided to post my concern here because I believe that there are so many gurus member here that can help.

 

I need your advice on what would be the protocol/configuration that I need to apply to make my network setup happen.

 

Currently the hardware’s ( Router 0, 1, 2 and 3 ) are configured as follow. Very simple configuration but its working fine without any issue.

 

ROUTER0#

ROUTER0#show run

ROUTER0#show running-config

Building configuration...

 

Current configuration : 770 bytes

!

version 12.2

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname ROUTER0

!

interface FastEthernet0/0

 ip address 172.17.32.200 255.255.255.0

 duplex auto

 speed auto

!

interface FastEthernet1/0

 no ip address

 duplex auto

 speed auto

 shutdown

!

interface Serial2/0

 ip address 161.126.44.193 255.255.255.252

!

router eigrp 7620

 network 161.126.0.0

 network 172.17.0.0

 no auto-summary

!

ip classless

ip route 0.0.0.0 0.0.0.0 172.17.32.1

!

no cdp run

!

line con 0

line vty 0 4

 login

!

end

==========================================================================================================

ROUTER1#show running-config

Building configuration...

 

Current configuration : 753 bytes

!

version 12.2

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname ROUTER1

!

interface FastEthernet0/0

 ip address 192.168.3.200 255.255.255.0

 duplex auto

 speed auto

!

interface Serial2/0

 ip address 161.126.44.194 255.255.255.252

 clock rate 2000000

!

router eigrp 7620

 network 161.126.0.0

 network 192.168.3.0

 no auto-summary

!

ip classless

!

no cdp run

!

line con 0

line vty 0 4

 login

!

end

 

ROUTER2#show running-config

Building configuration...

 

Current configuration : 847 bytes

!

version 12.2

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname ROUTER2

!

interface FastEthernet0/0

 ip address 192.168.0.200 255.255.255.0

 duplex auto

 speed auto

!

interface FastEthernet0/0.1

 encapsulation dot1Q 10

 ip address 192.168.6.10 255.255.255.0

!

interface FastEthernet1/0

 no ip address

 duplex auto

 speed auto

 shutdown

!

interface Serial2/0

 ip address 161.126.44.221 255.255.255.252

!

interface Serial3/0

 no ip address

 shutdown

!

interface FastEthernet4/0

 no ip address

 shutdown

!

interface FastEthernet5/0

 no ip address

 shutdown

!

router eigrp 7609

 network 161.126.0.0

 network 192.168.0.0

 network 192.168.6.0

 no auto-summary

!

ip classless

!

no cdp run

!

line con 0

line vty 0 4

 login

!

 

end

 

ROUTER3#show running-config

Building configuration...

 

Current configuration : 753 bytes

!

version 12.2

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname ROUTER3

!

interface FastEthernet0/0

 ip address 192.168.2.200 255.255.255.0

 duplex auto

 speed auto

!

interface FastEthernet1/0

 no ip address

 duplex auto

 speed auto

 shutdown

!

interface Serial2/0

 ip address 161.126.44.222 255.255.255.252

 clock rate 2000000

!

interface Serial3/0

 no ip address

 shutdown

!

interface FastEthernet4/0

 no ip address

 shutdown

!

interface FastEthernet5/0

 no ip address

 shutdown

!

router eigrp 7609

 network 161.126.0.0

 network 192.168.2.0

 no auto-summary

!

ip classless

!

no cdp run

!

line con 0

line vty 0 4

 login

!

end

 

 

 

4 Replies 4

Deepak Kumar
VIP Alumni
VIP Alumni

Hi,

How many public IPs allocated you by ISP? Is ISP providing BGP synchronizing (neighbourship)?

 

Regards,

Deepak Kumar

Regards,
Deepak Kumar,
Don't forget to vote and accept the solution if this comment will help you!

two IP's per ISP as you can see on the drawing above, i am not sure about BGP syncrhonization.

right now the two ISP provider are connected on two routers ( R0 and R1) with EIGRP and configure as redundant and its working fine now. if ISP get disconnected the ISP 2 will catch all traffic so there is no down time.

and i am not sure what protocol to use, how can i make those connection redundant using 4routers and 2 ISP providers.

my concern now is i will add two addtional router's as per drawing above to mitigate connection failure in-case of hardware break down.

thank you and hope you get what i mean, " sorry for the bad grammar"

As I understand the question. You can archive the same with HRSP configuration.

http://www.routerfreak.com/how-to-configure-hsrp-on-a-cisco-router/

Regards,
Deepak Kumar
Regards,
Deepak Kumar,
Don't forget to vote and accept the solution if this comment will help you!

You will need minimally a /24 (class C) block of registered IP addresses and an ARIN administered BGP ASN. If you have the /24 already, then you need to apply to ARIN for the BGP ASN. If you do not have the required addressing, you would need to obtain such a block from one of the ISP's and a letter of authorization from them the indicated address can be advertised to a secondary ISP. Once you have obtained the class C block from one of the ISP's, then you can get the ASN from ARIN.

 

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