iccrg-5----Page:23
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Challenge 5: TDM over Pseudo-Wires PW may carry non-TCP data flows e.g. TDM traffic => not responsive to congestion control in a TCP-friendly manner as prescribed by [RFC2914] Not possible to simply reduce the flow rate of a TDM PW when facing packet loss ........... ............ . . . S1 --- E1 --- . . . | . . . === E5 === E7 --- . | . . | S2 --- E2 --- . . | . . . | | ........... . | v . ----- R ---> ........... . | ^ . . . | | S3 --- E3 --- . . | . | . . | . === E6 === E8 --- . | . . S4 --- E4 --- . . . . . ........... ............ \---- P1 ---/ \---------- P2 ----- S1, S2, S3, S4 sources of TDM over IP traffic E1, E2, E3, E4 routers rate limiting traffic No effect from feedback on Sx or Ex BE traffic BE traffic |