Thanks for your reply and sorry if my message is not clear. the links are like this:
they are both using the same ASA. Why are you saying it is not possible to load balance between the 2 links? will the traffic takes the two paths if the static routes are pointed to the two paths? will routing protocol help(OSPF)?
however, instead of using the global NAT, i configure 2 static NAT for my ISA proxy server which serve all my clients internet connection.
When I remove my SDSL link, it works after a break and failover to the ADSL link, i can still ping public IP from the ASA. but my clients connection fail, and my GRE tunnel also fail. I have to manually reboot the ASA to get the GRE tunnel up, and reboot the ISA proxy too to get the links back again.
Attached is my layout, How do I make sure my GRE and clients internet connection through the proxy server works when I have this redundant links. I am using static route right now.
I am currently using 2 static routes with unequal cost method, with the ASA sending SMTP packets to a remote IP.
I notice that when the Leased line failed, it takes around 40 seconds to 1 minutes to fail over to the SDSL line, but the failback from SDSL to the leased line takes around 20 seconds, Is there a way to improve that?
If I go for the OSPF method, since I have two unequal speed lines, one 2MB, one 1.5MB. when OSPF load balance between this 2 lines, will it cause the traffic to slow down?
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