Wednesday, November 14, 2018

Slow site to site speeds over ipsec tunnel?!

Both locations have 100Mbps pipes.

But transfers between them over an ipsec tunnel is only getting 2.5mbps both ways. Something is clearly wrong here. No throttle on the tunnels, and I've adjusted MTU. Any other suggestions that I could use to troubleshoot this issue?

Is the difference really just ipsec overhead? Both sites using Cisco 1921 routers.



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