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  • How to check the line speed on the router

    Hi All,

    I have a 2 mb lease line 1:1 and have the router configured for the same.
    I have just joined the organization. I have a doubt that i am not getting 2 mb speed performance.

    Can anyone guide me how can I check if I am getting correct speed and what should be my settings on the router ( if exact command is available for modification would be of great help) for a 2 mb circuit on the fast serial port.

    When I say sh int s0 on the router it shows me line speed 1152. Is it correct.

    Thanks Everyone.

    Ebrahim

  • #2
    Re: How to check the line speed on the router

    Hi Ebrahim,

    Thanks for your post.

    Well, 1152kb is certainly not 2Mb. 2Mb would be 2048.

    Could it be that you have a a circuit that is 1Mb up and 1Mb down and your provider is telling you that you are getting 2Mb, if you were sending traffic full duplex?

    There are plenty of speed tests on the Internet to see what kind of throughput you are really getting. Here is one-
    http://www.bandwidthplace.com/speedtest/

    You could also take a tool like PRTG (http://www.paessler.com/prtg), turn on SNMP on the router, graph your utilization, and then download some huge file from the Internet (through a site that has much faster download speeds than yours).

    Let us know what you find.

    Thanks,
    David
    David Davis - Petri Forums Moderator & Video Training Author
    Train Signal - The Global Leader in IT Video Training
    TrainSignalTraining.com - Free IT Training Products
    Personal Websites: HappyRouter.com & VMwareVideos.com

    Comment


    • #3
      Re: How to check the line speed on the router

      Hi David,

      Thankyou very much for your reply.

      I made a mistake in my post the speed I see is 1544 Kbit and not 1152
      I have a T1 circuit on the twisted pair

      I have run the speed test as given in your link

      the resuls I have got is

      Communication 747.3 kbps
      Storage 91.2 kbps
      1 MB file download 11.2 secs
      subjective rating good

      As per the explaination of the result I understand I am not getting complete 2 MB download speed.

      My router had only ip address for the serial port. And no other config settings

      After your reply I have changed the bandwidth to 2048 Kbit for the serial port
      Still I am getting the same speed


      Do I need to change any config on router if so can U help me with the commands, so I can get 2 MB speed.

      I am new to the router world and don't have hands on experience. For your second suggeted link how do I enable the SNMP on the router.

      I understand there is something wrong with the speed either the configuration of router or the circuit itself. My Service provider says I am getting right speed.

      Pls help me clear my doubts.

      Thanks once again


      Ebrahim

      Comment


      • #4
        Re: How to check the line speed on the router

        A T1 connections is 1544Kb and not 2MB so it looks like you are getting the correct bandwidth.
        1 1 was a racehorse.
        2 2 was 1 2.
        1 1 1 1 race 1 day,
        2 2 1 1 2

        Comment


        • #5
          Re: How to check the line speed on the router

          Hi All,

          Thanks for the reply.

          I checked with my service provider the bandwidth that we are getting is 2 MB and that is for sure as per them.

          I have just got a document of the ISP which says I have a Standard ILL ( internet lease line) 1:1 service and the speed is 2048 Kbps.

          This means the information I got from my office staff that it was a T1 connection is wrong.

          In that case how can I confirm. What does my test reading say?

          I know I am not able to provide U all with right information as I am technically weak in routers. Sorry for all that.

          Thanks

          Regds,

          Ebrahim

          Comment


          • #6
            Re: How to check the line speed on the router

            The bandwidth control usually from two aspects:

            1. ISP
            2. The network connection provider.

            So you may get from the network connection provider 2 MB/sec but the
            ISP can give you 1 MB/sec for example.

            The also a few level of quality of service so 2 MB/sec could be the maximum speed but
            The regular speed could be lower etc.

            Changing the line speed should be resolve by the ISP support staff so you wouldn’t need to
            Change by yourself anything.

            http://www.cisco.com/univercd/cc/td/...11/clkrate.htm

            http://www.cisco.com/univercd/cc/td/...to_doc/qos.htm

            https://my.more.net/services/bandwid...ationguide.pdf

            You can also use a monitoring tools like:

            http://oss.oetiker.ch/mrtg/

            Instead regular SNMP.

            http://www.cisco.com/univercd/cc/td/...o_doc/snmp.htm


            Regards,

            Yuval
            Last edited by yuval14; 2nd July 2006, 22:19.
            Best Regards,

            Yuval Sinay

            LinkedIn: https://www.linkedin.com/in/yuval14, Blog: http://blogs.microsoft.co.il/blogs/yuval14

            Comment


            • #7
              Re: How to check the line speed on the router

              Hi Friends,

              Thanks for all your help and efforts to clear my doubts.

              I have given below my router config, can U suggest if it requires any modification that can help me improve my connection speed.



              Building configuration...

              Current configuration : 1027 bytes
              !
              ! Last configuration change at 10:43:08 ist Tue Jun 20 2006
              !
              version 12.3
              service timestamps debug datetime msec
              service timestamps log datetime msec
              no service password-encryption
              !
              hostname Router
              !
              boot-start-marker
              boot-end-marker
              !
              logging buffered 4096 debugging
              enable secret 5 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
              !
              clock timezone ist 5 30
              mmi polling-interval 60
              no mmi auto-configure
              no mmi pvc
              mmi snmp-timeout 180
              no aaa new-model
              ip subnet-zero
              ip cef
              !
              !
              !
              ip audit notify log
              ip audit po max-events 100
              ip name-server aaa.bbb.ccc.ddd
              ip name-server aaa.bbb.ccc.ddd
              no ftp-server write-enable
              !
              !
              !
              !
              !
              !
              !
              interface BRI0
              no ip address
              shutdown
              !
              interface FastEthernet0
              ip address aaa.bbb.ccc.ddd 255.255.255.128
              speed auto
              !
              interface Serial0
              bandwidth 2048
              ip address aaa.bbb.ccc.ddd 255.255.255.252
              !
              ip classless
              ip route 0.0.0.0 0.0.0.0 aaa.bbb.ccc.ddd
              no ip http server
              no ip http secure-server
              !
              !
              line con 0
              password xxxxxxxxx
              login
              line aux 0
              line vty 0 4
              password xxxxxxxxx
              login
              !
              no scheduler allocate
              !
              end

              Router#



              Thanks & Regds,

              Ebrahim

              Comment


              • #8
                Re: How to check the line speed on the router

                One thing I want to point out about your cofiguration is that the "bandwidth" statement on the serial interface (or any interface for that matter) is strictly for aesthetics and routing protocols. It has nothing to do with the real bandwith of the link or the performance of the link.

                In other words, you could have a 1GB Ethernet interface and set the bandwith statement to 56. This would do nothing for the performance of the link, it would only influence the routing protocols (the ones that use it like OSPF and EIGRP) to use some other link with better bandwidth.

                As you have a serial interface, you must have an external CSU/DSU. If you have a FULL T1 from your ISP, that is 24 channels of 64kb each. Together, those add up to 1544Kb or 1.544Mb.

                A T1 is full duplex. That means that, at any one time, you can send 1544kb and you can receive 1544kb.

                I recommend something like PRTG to use to monitor this.

                If you have any more questions, please post them, I am here to help!

                Thanks,
                David Davis
                David Davis - Petri Forums Moderator & Video Training Author
                Train Signal - The Global Leader in IT Video Training
                TrainSignalTraining.com - Free IT Training Products
                Personal Websites: HappyRouter.com & VMwareVideos.com

                Comment

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