We were getting about 48Mbps down and 20Mbps up according to Speakeasy speedtest for FIOS 50MBps service. We upped the FIOS service to 75Mbps, but the download speed hasn't increased at all, although upload has improved to around 39Mbps. When I run the Verizon Network Diagnostics Tool it finds a 45Mbps T3/DS3 link in half duplex mode. Do I understand correctly that a 45Mbps T3 in Half Duplex cannot deliver 75Mbps bandwidth? And what does "sender limited" mean in this context? Thanks
----------------------------------------
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
SendBufferSize set to [8192]
running 10s outbound test (client to server) . . . . . 5.68Mb/s
running 10s inbound test (server to client) . . . . . . 45.40Mb/s
------ Client System Details ------
OS data: Name = Windows 7, Architecture = x86, Version = 6.1
Java data: Vendor = Oracle Corporation, Version = 1.7.0_17
------ Web100 Detailed Analysis ------
Client Receive Window detected at 261340 bytes.
45 Mbps T3/DS3 link found.
Link set to Half Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.
Web100 reports the Round trip time = 38.26 msec; the Packet size = 1460 Bytes; and
There were 2 packets retransmitted, 355 duplicate acks received, and 352 SACK blocks received
The connection was idle 0 seconds (0%) of the time
This connection is receiver limited 4.65% of the time.
This connection is sender limited 85.18% of the time.
This connection is network limited 10.17% of the time.
Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: ON
Packet size is preserved End-to-End
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address
↧