Load Sharing for redundant internet conection Through Multiple Routers

[telesymbol]

Dears,

we've purchased (two) redundant internet links from our ISP to be terminated on two (redundant) Cisco routers.

ISP will configure BGP, between our redundant routers and the ISP side devices and Internally these routers will be connected to redundant Cisco FTDs managed through FMC. we're planning to configure GLBP on the routers internal interface enable load sharping for the internet. attached is our expected connectivity. please advise how we can meet redundancy and internet load sharing as per attached diagram.

Our redundant routers internally connect to our FTDs by OSPF.

Regards

[paul driver]

Hello
No attached diagram!
Depending on what you are going to receive  (full/partial or default route) from the BGP multihomed isp connections its possible you could run IBGP between the wan rtrs and the FTDs, as such there maybe no need for any FHRP or even an IGP.

Are the FTDs performing your l3 for the lan?

[telesymbol]

Hello Paul,

Thanks for your valuable response, at the moment our FTDs and routers are connected with ospf routing.

I've attached the diagram we've planned to implement.

Thanks

[paul driver]

Hello
Still not enough information surrounding bgp -and you inter-vlan routing - however based on what you have provided- one solution could be to run bgp/ospf on your wan rtrs - redistribute ospf into bgp for your LAN and just advertise a default route with preferred seed metric&type into ospf for the primary egress path- this would provide wan/lan resilience-

Additionally LB ingress/egress traffic would then depend on what it is you would like to achieve but you have various ways (inclusive of summary route advertising and using bgp attributes such as local preference-as-path prepending -med etc..)