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blackswans
Beginner

Bgp Multihoming design with two ISP & two routers

Hi,

I want to implement bgp with two different ISP's with two routers. Wan side is ok but how can be the design for local interfaces? Should we make HSRP or something else? Any design guide for local side?

I'm using different firewalls in the local side of the bgp routers.

Thanks

7 REPLIES 7
msaeedi
Beginner

Hi from local LAN point of view you can implement HSRP or VRRP between routers terminate the WAN links , can you clarify that by giving network topology or diagram ..

waiting your reply  

Senior Network Engineer

wan.jpg

Hi,

If your routers are Cisco Product then HSRP is a good solution for you if you don't want to use both ISP (Yes it is possible through HSRP to use both ISP but you have to configure two different default gateway for your firewalls its not a good design) and If you seeking the solution to load balancing also then go with GLBP. 

 

Regards,

Deepak Kumar

 

 

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

you can configure HSRP between R1 and R2 Now the network between R1, R2 and Fw1, Fw2, FW3 will be the same subnet to achieve redundancy lets assume the subnet is  :  192.168.1.0/24 

 

R1 192.168.1.1      R2 192.168.1.2     Virtual IP : 192.168.1.254  , FW1: 192.168.1.3, Fw2: 192.168.1.4, Fw3: 192.168.1.5

 

configure HSRP between tow routers R1 and R2 and configure default route on each firewall at virtual ip this will work fine with you , policy will deal with the Virtual IP 

 

i hope this is clear for you 

Senior Network Engineer

OK hsrp is a good solution I think we will not use load balance. So how should be the hsrp config, should we use bgp tracking with hsrp so If ISP2 bgp goes down r1 will be active for hsrp configuration? Or ibgp?


@blackswans wrote:

OK hsrp is a good solution I think we will not use load balance. So how should be the hsrp config, should we use bgp tracking with hsrp so If ISP2 bgp goes down r1 will be active for hsrp configuration? Or ibgp?


yes you are right , now as per my understanding you are looking for load balance for outgoing traffic , so go through GLBP Protocol , just google it basic configuration. 

 

for inbound traffic go through bgp protocol , modify the attribute to achieve that. 

Senior Network Engineer

Hi, 

For understanding the HSRP and configuration follow the below link:

 

https://supportforums.cisco.com/t5/network-infrastructure-documents/hsrp-overview-and-basic-configuration/ta-p/3131590

 

Regards,

Deepak Kumar

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