How to route traffic via two different ISP from Cisco ASA 5510 simultaniosly
Hi. I want to configure two different ISP to my Cisco ASA 5510 (on two different interfaces). now, i want some IP, to route defaul traffic to internet via ISP01. Some other internal IP to route default traffic via ISP02.
So, is this possible? also, i want to track connectivity on ISP01, if it fails, all the traffic to be routed via ISP02. Regards!
How to route traffic via two different ISP from Cisco ASA 5510 s
To effectively use 2 ISP links on an ASA you would need to be running 8.4(x) software or higher.
This would enable you to use NAT to select what ISP link each LAN network uses. Though with this kind of NAT setup the NAT configuration becomes more complicated to manage. I am also not sure if this setup would be able to reach to ISP links going down as with the NAT configuration we are specifically overriding the routing table and using the NAT to decide the interface through which the traffic goes.
So the setups you can do are atleast
2 ISP setup with a single active ISP for outbound connections at a given time (ISP Failover)
2 ISP setup with NAT configurations to utilize both ISP links at the same time for outbound connections
2 ISP setup with the mentioned way of routing part of the IPv4 address space through each ISP link. Though I wouldnt personally use this.
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