Bandwidth assigned to gre tunnels?

Unanswered Question
Aug 22nd, 2007
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Hello,


I'm using gre over ipsec and in the output of "sh int tunnel x" command I can see "BW 9 Kbit". Then, some lines below, i see:


"Tunnel transmit bandwidth 8000 (kbps)"

"Tunnel receive bandwidth 8000 (kbps)"


Can someone explain me what these three bandwidths are and why they are different?

If I wanted to limit the banwdidth of my gre tunnel, for example because I want to give each tunnel 10Mb, would a simple "bandwidth 10000" command on the tunnel interface do the trick?


Thank you

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royalblues Wed, 08/22/2007 - 00:41
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Friend,


By default the IOS computes the bandwidth of a GRE tunnel as 9 Kbps


Bandwidth command under an interface has no significance on the actual bandwidth of the link. It is used by routing protocols like EIGRP & OSPF to compute their metric. ALso some NMS tools tend to take this bandwidth into consideration for calculation utilization % etc.


If you want to limit the bandwidth, then you have to use police/shape the traffic using QoS techniques


HTH, rate if it does

Narayan



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