Hi nanog, Can any friend tell me that how the major NSP/ISPs do the traffic engineering work, i.e. how do they adjust their traffic to fit their physical bandwidth? I know there are several papers on this issue by Awduche of UUNet, and some engineers of Juniper. Most of them suggest MPLS is the final solution, but I just want to know if there is any best practice to adjust the traffic in a pure igp/metric fashion ? Any handy tools to figure out, or calculate the proper metric value? I tried Netsys, but any better one ? We use i-isis as igp, so any isis specific method ? thanks for any input. best regards, Yu Ning ------------------------------------------- (Mr.) Yu(2) Ning(2) ChinaNet Backbone Operation +86-10-66418105/66418121/66418123(fax) -------------------------------------------