I have a 1MB link with 4 sub-interfaces. My question is that I plan to 'shape' one of the interfaces inbound to 1MB and leave the other sub-intefaces without shaping. If this is the case, would the other sub-interfaces get any bandwidth ?
 What if I shape average on all interfaces to 1MB inbound when the physical interface is only 1MB ? What would happen ?
Thanks again. My question was actually if the physical interface say is 1 MB and I have four-subinterfaces that I shape to 1MB. This would mean that I would effectively have 4MB of bandwidth which is not possible since the physical bandwidth of the interface is 1MB. How does the router detects this ?
I have tried this in dynamips and the router seems to take 1MB for traffic shaping when I apply it to all the 4 sub-interfaces ....
I don't believe Cisco QoS is smart enough to determine multiple sub-interface shapers sum exceed available bandwidth.
If Cisco QoS doesn't detect shaping more than link capacity, it means your shapers might be ineffective.
If the physical interface is truly 1 Mbps, why shape at 1 Mbps? If the physical interface was more than 1 Mbps, but latter downstream you had only 1 Mbps, shaping to 1 Mbps makes senses. Again, though, if you have multiple shapers, you could exceed the downstream capacity if the shapers' sums exceed the available bandwidth.
You also might try a single shaper at the main interface; unsure if this can be done if there's subinterfaces. If it can, it would insure the aggregate bandwidth not exceeded. It wouldn't, though, allow you to set bandwidth proportions between the subinterfaces. That could be done by shaping each subinterface, such that the multiple subintface shapers don't exceed the available bandwidth.
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...