How different is bandwidth allocation or shaping on cisco routers and other devcies ( like specific packetshapers, packeteer etc).
Does it mean shaping will apply even if there is no congestion or only if congestion is seen.
Appreciate your help!
Shaping will apply despite line being congested or not. Traffic shaping is used to guarantee a minimum amount of bandwidth for certain class and traffic policing to limit a class traffic to a maximum amount of bandwidth.
Usually from on-hand experience, provider will police the bandwidth and customers will shape (to avoid packet drop on the provider side).
Regarding your question about Cisco vs others, I have more experience with Cisco, but I believe that in terms of definition of what shaping, policing and so on it should be the same. The configuration and specific features may be different from product to product.