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Thread: Verizon DSL Problems

  1. #1

    Verizon DSL Problems

    Ive had Verizon DSL for 2 years already. at first i was downloading 200kbps max. now all of a sudden recently its been dropped to 100kbps maximum. at first i resetted my modem and router and everything but that didnt do anything. i didn't do ANYTHING out of the ordinary btw, im not sure whats wrong, help would be very appreciated thanks.

    TCP options string = 020405ac0103030201010402
    MTU = 1492
    MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
    MSS = 1452
    MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.
    Default TCP Receive Window (RWIN) = 261360
    RWIN Scaling (RFC1323) = 2 bits (scale factor of 4)
    Unscaled TCP Receive Window = 65340

    RWIN is a multiple of MSS
    Other RWIN values that might work well with your current MTU/MSS:
    511104 (MSS x 44 * scale factor of 8)
    255552 (MSS x 44 * scale factor of 4)
    127776 (MSS x 44 * scale factor of 2)
    63888 (MSS x 44)
    bandwidth * delay product (Note this is not a speed test):

    Your TCP Window limits you to: 10454.4 kbps (1306.8 KBytes/s) @ 200ms
    Your TCP Window limits you to: 4181.76 kbps (522.72 KBytes/s) @ 500ms
    MTU Discovery (RFC1191) = ON
    Time to live left = 54 hops
    TTL value is ok.
    Timestamps (RFC1323) = OFF
    Selective Acknowledgements (RFC2018) = ON
    IP type of service field (RFC1349) = 00000000 (0)

    results from http://nitro.ucsc.edu/

    TCP/Web100 Network Diagnostic Tool v5.4.11
    click START to begin
    Connected to: nitro.ucsc.edu -- Using IPv4 address
    Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
    checking for firewalls . . . . . . . . . . . . . . . . . . . Done
    running 10s outbound test (client-to-server [C2S]) . . . . . 373.0kb/s
    running 10s inbound test (server-to-client [S2C]) . . . . . . 832.82kb/s
    Your PC is connected to a Cable/DSL modem
    [S2C]: Excessive packet queuing detected

    results from http://www.mondospeed.com/lite_test.html

    The test has been completed in 5.218 seconds.

    Your speed is : 803.81 kbps.

    Test type: Cable (DSL)

    click START to re-test

    im getting really confused here

    thats my analysis, ive also used TCPOptimizer, butttt nothing changed. Ive searched through the forums but theres still lots of things im not sure i understand. know where i should start?

  2. #2
    Elite Member trogers's Avatar
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    Use TCP Optimizer with the following:

    General Settings tab:
    Custom settings - check
    Modify All Network Adapters - check
    network adapter selection - your NIC
    MTU - 1492
    TTL - 64
    TCP Receive Window - 31944
    MTU Discovery - Yes
    Black Hole Detect - No
    Selective Acks - Yes
    Max Duplicate ACKs - 2
    TCP 1323 Options:
    Windows Scaling - uncheck
    Timestamps - uncheck
    Advanced Settings tab:
    Max Connections per Server - 10
    Max Connections per 1.0 Server - 20
    LocalPriority - 5
    Host Priority - 6
    DNSPriority - 7
    NetbtPriority - 8
    Lan Browsing speedup - optimized
    QoS: NonBestEffortLimit - 0
    ToS: DisableUserTOSSetting - 0
    ToS: DefaultTOSValue - 80
    MaxNegativeCacheTtl - 0
    NetFailureCacheTime - 0
    NegativeSOACache Time - 0
    LAN Request Buffer Size - 32768
    Then select "Apply Changes" and reboot to take effect

  3. #3
    Nope, still the same, thanks for the quick reply though....got any other ideas?

  4. #4
    Elite Member trogers's Avatar
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    Do the nitro test again and post the full results under the 'Statistics' button. Blank off your IP address at the bottom of the results.

  5. #5
    chrisperry
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    you too?

  6. #6
    TCP/Web100 Network Diagnostic Tool v5.4.11
    click START to begin
    Connected to: nitro.ucsc.edu -- Using IPv4 address
    Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
    checking for firewalls . . . . . . . . . . . . . . . . . . . Done
    running 10s outbound test (client-to-server [C2S]) . . . . . 211.0kb/s
    running 10s inbound test (server-to-client [S2C]) . . . . . . 402.87kb/s
    Your PC is connected to a Cable/DSL modem
    [S2C]: Excessive packet queuing detected

    click START to re-test

    seems slower....

  7. #7
    Elite Member trogers's Avatar
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    That was just the Summary report. I was looking for the report under the 'Statistics' button which shows your Round trip time and signal quality.

  8. #8
    WEB100 Enabled Statistics:
    Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
    checking for firewalls . . . . . . . . . . . . . . . . . . . Done
    running 10s outbound test (client-to-server [C2S]) . . . . . 170.0kb/s
    running 10s inbound test (server-to-client [S2C]) . . . . . . 226.99kb/s

    ------ Client System Details ------
    OS data: Name = Windows XP, Architecture = x86, Version = 5.1
    Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_06

    ------ Web100 Detailed Analysis ------
    Cable modem/DSL/T1 link found.
    Link set to Full Duplex mode
    No network congestion discovered.
    Good network cable(s) found
    Normal duplex operation found.

    Web100 reports the Round trip time = 921.62 msec; the Packet size = 1452 Bytes; and
    No packet loss was observed.
    C2S throughput test: Packet queuing detected: 5.46%
    S2C throughput test: Excessive packet queuing detected: 18.05%
    This connection is receiver limited 62.61% of the time.
    Increasing the the client's receive buffer (31.0 KB) will improve performance
    This connection is network limited 37.3% 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: OFF

    Server 'nitro.ucsc.edu' is not behind a firewall. [Connection to the ephemeral port was successful]
    Client is not behind a firewall. [Connection to the ephemeral port was successful]
    Information: Network Middlebox is modifying MSS variable
    Server IP addresses are preserved End-to-End
    Information: Network Address Translation (NAT) box is modifying the Client's IP address

  9. #9
    Elite Member trogers's Avatar
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    Quote Originally Posted by Lethardicus
    Web100 reports the Round trip time = 921.62 msec; the Packet size = 1452 Bytes; and
    No packet loss was observed.
    C2S throughput test: Packet queuing detected: 5.46%
    S2C throughput test: Excessive packet queuing detected: 18.05%
    This connection is receiver limited 62.61% of the time.
    Increasing the the client's receive buffer (31.0 KB) will improve performance
    This connection is network limited 37.3% of the time.
    The cause for your slowdown is the high latency of 922ms. Usual value should be 90-130ms.

    Set your TCP Receive Window to 63888 for now and do a tracert to see if the problem is on your ISP's end.

  10. #10
    what do i use tracert on though?

  11. #11
    Elite Member trogers's Avatar
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    To do a tracert, click 'Start' and then 'Run'. Type "cmd" into the box and click 'ok'.

    A DOS black screen will appear. Type after the C:\

    tracert www.speedguide.net

    and press enter key

    When test is completed, move mouse cusor to the DOS black screen, click right and choose 'select all'.

    Move mouse cursor to the Quick Reply box of this forum, click right and 'paste'.

  12. #12
    Tracing route to speedguide.net [63.217.30.70]
    over a maximum of 30 hops:

    1 1 ms 1 ms 2 ms 192.168.1.1
    2 53 ms 14 ms 16 ms 10.9.60.1
    3 117 ms 39 ms 12 ms so-2-0-0-0.CORE-RTR2.BOS.verizon-gni.net [130.81
    .13.197]
    4 62 ms 76 ms 133 ms so-0-2-0-0.BB-RTR2.BOS.verizon-gni.net [130.81.2
    0.86]
    5 129 ms 59 ms 18 ms so-7-2-0-0.BB-RTR2.NY5030.verizon-gni.net [130.8
    1.19.66]
    6 77 ms 154 ms 123 ms so-7-0-0-0.BB-RTR1.NY5030.verizon-gni.net [130.8
    1.19.54]
    7 26 ms 25 ms 23 ms 130.81.19.74
    8 72 ms 42 ms 25 ms so-7-0-0-0.ASH-PEER-RTR2.verizon-gni.net [130.81
    .17.179]
    9 59 ms 32 ms 34 ms ge6-2.br02.ash01.pccwbtn.net [63.218.94.21]
    10 129 ms 120 ms 26 ms ge13-1.br01.ash01.pccwbtn.net [63.218.44.125]
    11 278 ms 251 ms 169 ms 63-217-30-70.pccwbtn.net [63.217.30.70]

    Trace complete.

  13. #13
    Elite Member trogers's Avatar
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    Quote Originally Posted by Lethardicus
    T
    3 117 ms 39 ms 12 ms so-2-0-0-0.CORE-RTR2.BOS.verizon-gni.net [130.81
    .13.197]
    4 62 ms 76 ms 133 ms so-0-2-0-0.BB-RTR2.BOS.verizon-gni.net [130.81.2
    0.86]
    5 129 ms 59 ms 18 ms so-7-2-0-0.BB-RTR2.NY5030.verizon-gni.net [130.8
    1.19.66]
    6 77 ms 154 ms 123 ms so-7-0-0-0.BB-RTR1.NY5030.verizon-gni.net [130.8
    1.19.54]
    Check with your ISP. Their line has pretty high latencies on all 4 hops.

  14. #14
    A+, S+, M+, C+, CySA+ Shinobi's Avatar
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    Lethardicus, Welcome to SpeedGuide

    My Father has the same problem that you had.. he was fine for 3 years.. then boom, down to 200kbs down.. Turn out to be a "line" problem.. Both He and I , had to hit up on Verizon to do anything about it..

    I have Verizon DSL, and even though I have great speed.. I do not like thier customer server support. Also have Verizon "CREDIT" you money back because you are not getting what you are paying for. Be firm on that!
    _______________________________________________
    Vendor neutral certified in IT Project Management, IT Security, Cisco Networking, Cisco Security, Wide Area Networks, IPv6, IT Hardware, Unix, Linux, and Windows server administration

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