Cisco Systems 8600 Series manual Meaning of Vsvd and Flow Control External Segments

ATM Connection Configuration

Figure 7-7 Meaning of VSVD and Flow Control External Segments

5

No

2

No

ABR Standard

VSVD

Yes

Flow control

external segment

Yes

4

1

No

ABR with ForeSight

Flow control

external segment

Yes

3

VS and VD shown below are for traffic flowing

in direction of arrow. For the other direction of traffic,

VS and VD are in the opposite direction.

External segment

1

2

3VS ABR VD

4VS ABR VD

Network segment

ABR with ForeSight

VS	ABR standard	VD
	ABR with ForeSight
VS	ABR standard	VD

External segment

VS ABR VD

VS ABR VD

5

ABR standard without VSVD

(without congestion flow control performed by network segment)

S6158

ATM Connections 7-19