Wan to Lan throughput problem

[Anonymous]

I recently upgraded our WAN from a T1 to a 30mb broadband connection however the maximum download speed I can attain is 5mb.  When tested through another router I can attain the full 30mb.  I am using a very basic setup with one VPN connection, DHCP, a few Port mappings, and a guest LAN.  Any ideas what is slowing it down?  My upload speeds have full throughput at 3mb.

Mike

NetVanta 3120

Firmware Ver. 17.08.01.00.E

[Anonymous]

Mike,

Thank you for asking  your question Mike. I would suggest speaking to ADTRAN's Applications Engineers regarding what you are experiencing. They will be able to determine what kind of throughput you should expect based on your specific requirements. You can reach ADTRAN Applications Engineering by calling 888-423-8726 or sending an email to application.engineering@adtran.com .

It also may be worth looking over your interface statistics to make sure you are not seeing any errors incrementing on your WAN or LAN interface. These can be viewed by issuing the "show interface" command. I would also be more than happy to review your configuration to see if anything stands out. Please remember to remove any information that may be sensitive to your network.

Let us know if you have any questions.

Thanks,

Noor

[Anonymous]

Mike,

I don't see anything out of the ordinary in your configuration. I see that you have turned on FFE, which should help with the throughput as this allows the 3120 to more efficiently process packets. Could you post the output to "show interface" as well? I would be curious to see what the interface statistics look like.

As far as the firmware discrepancy goes, I think you may be viewing the firmware from a previously loaded config file of the 3120. The output to "show version" in the CLI should accurately state which firmware the 3120 is on. Try comparing that with what you are seeing in the "System Summary" page of the web interface. If the AOS versions don't match up there, please let us know.

Thanks,

Noor

[Anonymous]

Noor,

Thanks for the reply.  show version in the CLI is correct.  Here are the 'show interface' results you requested.  Something has to be wrong somewhere in my config.  This router should be capable of 32mbps up/down simoultaneously.  I can't seem to do better than 5mbps.  That can't be right.

NetVanta3120>show interface

Displaying interfaces...

modem 0/1 is admin down

  Caller ID will be used to route incoming calls

  Caller ID normal

  Allow ring events

  Last clearing of "show interface" counters: never

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

    80 packets input, 80 bytes, 0 no buffer

    0 runts, 0 giants, 0 throttles

    0 input errors, 0 CRC, 0 frame

    0 abort, 0 discards, 0 overruns

    7 packets output, 51 bytes, 0 underruns

ppp 1 is administratively down

  Configuration:

    Keep-alive is set (10 sec.)

    No multilink

      MTU = 1500

    No authentication

    Neither bridge nor IP is configured

  Last clearing of "show interface" counters: never

  No links created for this PPP interface

  Bundle information

    Queueing method: weighted fair

    HDLC tx ring limit: 0

    Output queue: 0/0/684/64/0 (size/highest/max total/threshold/drops)

      Conversations  0/0/256 (active/max active/max total)

      Available Bandwidth 0 kilobits/sec

eth 0/1 is UP, line protocol is UP

  Description: WAN

  Hardware address is 00:00:00:00:00:00

  Ip address is 111.111.111.111, netmask is 255.255.255.248

  MTU is 1500 bytes,  BW is 100000 Kbit

  100Mb/s, full-duplex

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: never

  5 minute input rate 297616 bits/sec, 38 packets/sec

  5 minute output rate 38920 bits/sec, 28 packets/sec

    Queueing method

        Configured Queueing Method: fifo

        Effective  Queueing Method: weighted fair

    Output queue: 0/1/684/64/0 (size/highest/max total/threshold/drops)

      Conversations  0/1/256 (active/max active/max total)

      Available Bandwidth 74200 kilobits/sec

    Interface Shaper: NOT ENABLED

2012.05.03 14:01:33 FIREWALL id=firewall time="2012-05-03 14:01:33" fw=NetVanta3

120 pri=1 rule=7  proto=http src=192.168.100.109 dst=111.111.111.111 msg="Zero by

tes transferred for connection Src 49426 Dst 80 from Private policy-class on int

erface vlan 1" agent=AdFirewall     7245657 packets input, 1580277014 bytes

    7235522 unicasts, 10128 broadcasts, 7 multicasts input

    0 unknown protocol, 0 symbol errors, 0 discards

    0 input errors, 9907 runts, 0 giants

    0 no buffer, 0 overruns, 0 internal receive errors

    0 alignment errors, 102543 crc errors

    5668390 packets output, 1167107532 bytes

    5667381 unicasts, 950 broadcasts, 0 multicasts output

    0 output errors, 0 deferred, 0 discards

    0 single, 0 multiple, 0 late collisions

    0 excessive collisions, 0 underruns

    0 internal transmit errors, 0 carrier sense errors

    0 resets, 7 throttles

swx 0/1 is UP, line protocol is UP

  Hardware address is 00:00:00:00:00:00

  100Mb/s, negotiated full-duplex, configured full-duplex

  input flow control is disabled, 0 pause frames received

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: never

  5 minute input rate 45872 bits/sec, 34 packets/sec

  5 minute output rate 299736 bits/sec, 40 packets/sec

    Queueing method: fifo

    Output queue: 0/256/0 (size/max total/drops)

    Interface Shaper: NOT ENABLED

    6744803 packets input, 1277754309 bytes

    6015061 unicasts, 364399 broadcasts, 365343 multicasts input

    0 symbol errors, 0 discards

    0 input errors, 0 runts, 0 giants

    0 alignment errors, 0 crc errors

    7965606 packets output, 1613998911 bytes

    7597293 unicasts, 94162 broadcasts, 274151 multicasts output

    0 output errors, 0 deferred, 0 discards

    0 single, 0 multiple, 0 late collisions

    0 excessive collisions

swx 0/2 is UP, line protocol is UP

  Hardware address is 00:00:00:00:00:00

  100Mb/s, negotiated full-duplex, configured full-duplex

  input flow control is disabled, 0 pause frames received

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: never

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 5288 bits/sec, 5 packets/sec

    Queueing method: fifo

    Output queue: 0/256/0 (size/max total/drops)

    Interface Shaper: NOT ENABLED

    0 packets input, 0 bytes

    0 unicasts, 0 broadcasts, 0 multicasts input

    0 symbol errors, 0 discards

    0 input errors, 0 runts, 0 giants

    0 alignment errors, 0 crc errors

    1097162 packets output, 117773424 bytes

    84 unicasts, 457885 broadcasts, 639193 multicasts output

    0 output errors, 0 deferred, 0 discards

    0 single, 0 multiple, 0 late collisions

    0 excessive collisions

swx 0/3 is UP, line protocol is UP

  Hardware address is 00:00:00:00:00:00

  100Mb/s, negotiated full-duplex, configured full-duplex

  input flow control is disabled, 0 pause frames received

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: never

  5 minute input rate 264 bits/sec, 0 packets/sec

  5 minute output rate 6488 bits/sec, 5 packets/sec

    Queueing method: fifo

    Output queue: 0/256/0 (size/max total/drops)

    Interface Shaper: NOT ENABLED

    289826 packets input, 74159789 bytes

    198284 unicasts, 89707 broadcasts, 1835 multicasts input

    0 symbol errors, 0 discards

    0 input errors, 0 runts, 0 giants

    0 alignment errors, 0 crc errors

    1203356 packets output, 180429629 bytes

    197186 unicasts, 368576 broadcasts, 637594 multicasts output

    0 output errors, 0 deferred, 0 discards

    0 single, 0 multiple, 0 late collisions

    0 excessive collisions

swx 0/4 is DOWN, line protocol is DOWN

  Hardware address is 00:00:00:00:00:00

  ?b/s, negotiated ? duplex, configured full-duplex

  input flow control is disabled, 0 pause frames received

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: never

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

    Queueing method: fifo

    Output queue: 0/256/0 (size/max total/drops)

    Interface Shaper: NOT ENABLED

    0 packets input, 0 bytes

    0 unicasts, 0 broadcasts, 0 multicasts input

    0 symbol errors, 0 discards

    0 input errors, 0 runts, 0 giants

    0 alignment errors, 0 crc errors

    0 packets output, 0 bytes

    0 unicasts, 0 broadcasts, 0 multicasts output

    0 output errors, 0 deferred, 0 discards

    0 single, 0 multiple, 0 late collisions

    0 excessive collisions

vlan 1 is UP

  Hardware address is 00:00:00:00:00:00

  vlan 1 Ip address is 192.168.100.1, netmask is 255.255.255.0

  MTU is 1500 bytes, BW is 100000 Kbit

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: 5d 21:49:53

  5 minute input rate 42352 bits/sec, 31 packets/sec

  5 minute output rate 301040 bits/sec, 39 packets/sec

    6435138 packets input, 1240469707 bytes

    5981332 unicasts, 453806 broadcasts, 0 multicasts input

    7566987 packets output, 1634055832 bytes

    7562507 unicasts, 4480 broadcasts, 0 multicasts output

    0 discards

vlan 2 is admin down

  Description: Guest Interface

  Hardware address is 00:00:00:00:00:00

  vlan 2 Ip address is 10.0.0.1, netmask is 255.255.255.0

  MTU is 1500 bytes, BW is 100000 Kbit

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: 5d 21:49:53

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

    0 packets input, 0 bytes

    0 unicasts, 0 broadcasts, 0 multicasts input

    0 packets output, 0 bytes

    0 unicasts, 0 broadcasts, 0 multicasts output

    0 discards

[Anonymous]

Hi Mike:

I don't know, our experience has been the same.  For what it's worth, we have seen a pretty low throughput ceiling on the 3120.  We used to install the 3120 often, when it was common for small office/home offices (SOHO) to connect via DSL or something just a couple Mbps fast.  Current broadband speeds burst pretty high and I think you'll do much better with a 3400-series product.  Maybe will have an ace up her sleeve... 

While you're waiting, you can't go wrong running this by an ADTRAN Applications Engineer (pre-sales support):  888-4-ADTRAN

CJ

[Anonymous]

CJ,

Thanks for the reply.  That's not good to hear, but it really helps to know that you've had the same experience.  I'll be looking for another router with a more robust throughput then.

Mike

[Anonymous]

Are the CRC errors incrementing on eth0/1 as this indicates a problem there.

  0 no buffer, 0 overruns, 0 internal receive errors

    0 alignment errors, 102543 crc errors

    5668390 packets output, 1167107532 bytes

[Anonymous · Accepted solution]

Based on what is saying, if those CRC errors are incrementing, you will want to see if there is a duplex mismatch between the eth 0/1 interface and the interface it is plugging into. Our suggestion is that both interfaces either be set to auto-negotiate, or they be hard-set to the same speed and duplex. If you find a mismatch, then correcting this should improve throughput. You may also want to try switching out cables if you have not done so.

However, I also agree with 's comment that the 3120 may not be able to perform at the full 30mbps up/down throughput you are looking to attain. I agree that it would be a good idea for you to contact Adtran's Applications Engineers so they can verify this for you.

Thanks,

Noor

[Anonymous]

The CRC errors are incrementing.  I swapped out the patch cable to no avail.  I am running 100mb/Full duplex from the adtran.  I can't get access to the SMCD3GN2 cable modem that Charter provided.  I suspect that it is in bridged mode and I don't know how to access the config.  I've tried 192.168.0.1 and 1.1 but no luck. (while connected directly to it with a static IP in the same range)

I tried setting the Adtran eth/01 interface to auto, but it keeps defaulting back to 100mb/full duplex even after a save and a reboot with save.

Any suggestions?

thanks for the help.

[Anonymous]

Wow, how weird is that.  I finally realized I was clicking 'save' but not 'apply'.  I switched the eth/01 interface to Auto and after applying, it still connected at 100mb/full duplex, but no more CRC errors and my download speeds jumped to 25mb.  Thanks for stickin with me and helping out on this one.  Much Appreciated!

Mike

[Anonymous]

I saw this flagged as a popular post, so I thought I'd share the attached PDF regarding duplex issues for those that trek past this spot...

Glen

[Anonymous]

Good write up.  From what I can gather, it sounds like my modem lan ports were set to auto, but because my wan port on the router was set at 100mb/FullDuplex it would not negotiate a connection and the modem was falling back to half duplex.  After I set the router to auto configure, both devices were able to talk and negotiate a true 100mb/FullDuplex connection. Very helpful for configuring devices in the future.

Mike

[Anonymous]

This does not relate to your problem but I would like to know, what tool are you using to measure throughput?

[Anonymous]

typical speedtest.net and speedtest.charter.net

[Anonymous]

Hey TPS, noticed you got that firewall message in the middle.

I've found that entering "no event" in the CLI will disable those messages from spamming you during that session alone. Log out, log back in, and you can monitor the events again.

So if you ever need a clean capture (or just need stuff to NOT scroll off your PuTTY session on a misbehaving router), give that a try!

[Anonymous]

You can toggle default events back on by entering "events" (no quotes) at the enable prompt.  Hope that saves you a logoff/on someday. 

[Anonymous]

We did some testing awhile ago on the 3120 platform, WAN to LAN varied with NAT on/off, but we were seeing anywhere from 15-18mbs throughput.