I have two links with different ISP's and both the (512Kbps) links are terminated on separate Cisco routers (2811). Currently, we are using one link. Another link is new. I want to do load sharing and redundancy between them. Right now I am not using BGP (routers are configured in simple manner). My client and I are concerned with cost.
My present network scenario looks like this:
Internet Ri (ISP 1) -- Layer 3 switch (working here as a simple switch) --- Firewall 1 (Cisco ASA5510) -- Firewall 2 (Cisco ASA5510) --- LAN.
On Firewall 1, remote and site-to-site VPN is configured -- one DMZ. My LAN is in the 172.16.1.xx series; my DMZ is in 172.16.4.10, and after 172.16.1.30 is used for the desktop, 192.168.x.x is the management IP.
Right now I have one other Internet link (512kbps) from a different ISP. So please tell me how I can accomplish load balancing with redundancy.
I've tried OER but unsuccessfully, due to IOS image (c2800nm-ipbasek9-mz.124-11.T.bin) and ISP's AS. Can it be possible through natting, and ACL? Please help me with the OER or anything I've mentioned. If possible, please show me a sample configuration.