Hi! This is my first post here. Thanks to Cisco for providing this valuable resource. I'm primarily a Unix system administrator, but I wear many hats do to the small size of the company I'm currently working for. In other words, we don't have a dedicated network engineer.
We recently turned up an AT&T Ethernet WAN circuit between our two data centers (one in Boston, the other in New Jersey). The circuit is supposed to provide 150 Mbit/s. Testing with iperf, I see the expected throughput running from New Jersey to Boston (>100 Mbit/s), but only about one fifth what is expected running from Boston to New Jersey (30 Mbit/s). There are no errors on the Cisco 3560 switches at either end. The odd thing is, if I run 5 iperf clients simultaneously in Boston, each will show just over 20 Mbit/s, which means just about 100 Mbit/s total.
Any ideas what might be wrong? Configuration snippets and iperf test results can be found at the end of the post. Thanks in advance for any suggestions.
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