intarea-2----Page:20
1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27 

Legacy ISP A
ISP B
ISP D
ISP C
A
C
S
R1
R2
R3
Router D1
Incremental deployment
During initial stages, legacy ISPs will be the norm
Use true-source bit to prioritize traffic at the destination ISP’s peering routers
Implement true-source “bit” as a diffserv code point
prioritize
TS = 0
PPT Version