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GRE/IPSEC Performance Problems

I have a customer who has 2 sites connected using sDSL (Dialer) at SOHO91 to a MPLS ISP Private Backbone (one primary and one secondary at each site). For "best available way to use" I integrated GRE Tunnel with dynamic Routing between each Router to the both Routers of the other site (using RIP cause SOHO91 cannot use EIGRP). Finally I added IPSec over these Tunnels and everything works fine but now the customer can use only 1,2 MBPS instead of 1,9Mbps. When disabling IPSec I have 1,8Mbps. So I have much loose of bandwith. Any idea where I could tune to being able to use the (almost) max of 2Mbps of the sDSL-connection?? Thanks in advance, Matt.

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Re: GRE/IPSEC Performance Problems

On the GRE tunnel can you able ip tcp adjust-mss 1400 and see if it improves your throughput.

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