First of all I want to say I know nothing of Cisco IOS, nor have access to the router itself. Now here is a brief summary of the issue and steps taken so far.
WHAT WE WANT TO DO:
Trying to link balance a T-1 (primary as of now) and FiOS business connection using a Cisco 1841 router.
ATT T-1 1.5Mbit through a T1 card plugged to a Cisco 1841 router
Verizon FiOS 20/20Mbit with 5 static IPs. 1 currently used for the router.
FiOS WITHOUT THE CISCO ROUTER:
Automatic Settings for connection (full duplex) and MTU (1500).
Plugging in the FiOS connection from the ONT to the supplied Verizon Westell router, or a LinkSys router, or to a PC configured with the static IP address gets me blazing fast uploads/downloads.
FiOS THROUGH THE CISCO ROUTER:
Trying to implement Optimized Edge Routing, 2 internal static IPs are setup to use FiOS as outbound connectivity.
Download speeds are blazing fast
Upload speeds are almost non existant, like 80Kb.
Speed tests using any site like speedtest.net fail to even initiate the upload.
TROUBLESHOOTING STEPS SO FAR:
Our Cisco expert swears there is nothing on the router that blocks or interferes with the connection.
He removed anything redundant at one point.
He belives it's the MTU settings.
We tried playing around with different numbers, including 1492 and went down very low.
Set TCP MSS Adjust to 1452 on the inside interface.
used the following articles as guides:
We contacted Verizon FiOS support, but they are clueless and insist the problem is on our side, but can not provide us with the MTU settings for getting this to work. I am actually shocked they expect us to use a home router for business grade FiOS!
I asked our Cisco expert for a copy of the config file, without passwords or identifying info, hopefully he will send it over later.
Looking for some clues that would clear this up.