Load Sharing When Multihomed to Two ISPs Through Multiple Local Routers
I have 2*/23 real IP ranges configured on my multiple routers
rtr1 has IP address 18.104.22.168/23 rtr2 has IP address 22.214.171.124/23. the other /23 is logical and pointed towards the firewall IP 126.96.36.199/23. I wish to achieve load sharing for outbound traffic. I am learning only default routes from the ISP. I want 1*/23 to travel via ISP1 and the second /23 to be on ISP2. Inbound would be achieved by As-prepend. I am not sure how to go abt outbound load sharing.
Re: Load Sharing When Multihomed to Two ISPs Through Multiple Lo
>> can i achieve source based outbound load sharing?
you can achieve it if you use HSRP and make router1 HSRP active for subnet 1, router2 HSRP active for subnet 2. Note: you need to use two different HSRP groups one for each subnet (but this how HSRP works)
I would suggest to track the state of the wan interface on each router on both HSRP groups.
In the document that you have linked there is a case for two ISPs and multiple routers.
However, using default settings each router should prefer the default route received in the eBGP session.
If you are receving only default routes you can even skip the iBGP session between your two routers and use tracking of interface with HSRP as explained before.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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