Reg:GRE tunnel bandwidth

HI,

Can someone resolve my problem.As we know the default bandwidth in gre tunnel inteferface is 9kbps.But if the source of gre tunnel is fastethernet whose

actual b/w is 100Mbps and we have two gre tunnels sourcing from fastethernet then what will be the access rate of tunnels.If we will assign bandwidth on

tunnel will it affect the tunnel access rate or bandwidth command under tunnel is used for QoS purpose.

Please help.

Thanks

 

Comments

  • plz help


    On Wed, Sep 23, 2009 at 9:34 PM, vinod kumar <[email protected]> wrote:

    HI,

    Can someone resolve my problem.As we know the default bandwidth in gre tunnel inteferface is 9kbps.But if the source of gre tunnel is fastethernet whose

    actual b/w is 100Mbps and we have two gre tunnels sourcing from fastethernet then what will be the access rate of tunnels.If we will assign bandwidth on

    tunnel will it affect the tunnel access rate or bandwidth command under tunnel is used for QoS purpose.

    Please help.

    Thanks

     





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  • Hey Vinod

    The Bandwidth command is used for QoS purpose , Routing Protocol Metric Calculation etc.

    It will not have any effect on the Access Rate. And Packets will be forwarded at the interface speed.


    HTH,

    Zeeshan Sanaullah , CCIE #25196 (R&S)

  • Hi ,

     

    Thanks.I have a ene-to-end tunnel with ipsec and when I ping tueel destination with tunnel source with timeout 0 sec I do not see any drops but when left the default i.e 2sec it starts dropping.We have tunnels accross metro ethernet whose mtu is 1500.Is any mtu across the path causing this.will path-mtu-discovey resolve it.


     

    Thanks

     

    On 9/24/09, ccieat21 <[email protected]> wrote:

    Hey Vinod

    The Bandwidth command is used for QoS purpose , Routing Protocol Metric Calculation etc.

    It will not have any effect on the Access Rate. And Packets will be forwarded at the interface speed.


    HTH,

    Zeeshan Sanaullah , CCIE #25196 (R&S)




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  • The way I understand this is the the physical interface is what tells the true story of the link, correct?  My question: On my Tunnel interface I see very high "txload" & "rxload" (~197/255) on the GRE Tunnel interface only.  I also see input & output drops on the Tunnel interface only. 

    When I look at the underlying physical interface, G0/1, I see very low (1/255) "txload" & "rxload" numbers.  I also see no input & output drops on the physcial interface.  So, are all those Tunnel interface numbers useless?  What are they even for? 

     

    Thanks Guys.

     

    Owen_

  • Hi,

    I see it like this:

    Everything related to the IP, utilization, packet counts, etc should be visualized on the Tunnel interface, as it is the L3 interface.

    While everything related to errors, CRC, carrier transitions, etc should be viewed on the physical interface.

    HTH

    Good luck!

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