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HA design recommendations

vinayak-nayak
Level 1
Level 1

Hi All,

 

I intend to setup a HA network infrastructure using the following setup. 

 

Two separate links from branch office to core sites 1 and 2, Two separate links from site 1 and site 2 towards the internet, Two separate links between the sites 1 and site 2 with HSRP per vlan setup and VIP of each group acting as default gateway for each vlan in the branch site. No routing protocol is used between the branch and core site due to physical proximity and a dark fiber already exists so vlans are just extended over the dark fiber trunk. BGP peering on the internet links towards ISP's from the core sites. In such a design how to avoid asymmetric routing ? How to use IP SLA and cause auto-failover between site 1 and site 2 wan links or how to use load sharing over both the site 1 and site 2 wan links ?  Rough diagram attached for reference. Please recommend... Thanks

 

 

2 Replies 2

Mark Malone
VIP Alumni
VIP Alumni

Hi
Use BGP to load share the links from the ISP , this doc shows you the scenarios and how to, has several different scenarios with diagrams , i think the dual  ISP one would be your setup

 

 

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13762-40.html

 

Load Sharing When Multihomed to Two ISPs Through Multiple Local Routers

Hi Mark,

 

Thank you for that input. I will check and get back