Available Bit Rate Foresight Connections; Figure 21-9 Meaning Of Vsvd And Flow Control External Segments - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

ATM Connection Configuration

Figure 21-9 Meaning of VSVD and Flow Control External Segments

5
2
1
2
3
4
5

Available Bit Rate Foresight Connections

The Available Bit Rate Foresight (ABRFST) connection uses the propriety ForeSight congestion
control and is useful when configuring connections on which both ends do not terminate on BXM cards.
The parameters for an ABRFST connection are shown in Figure 21-10 in the sequence in which they
occur during the execution of the addcon command.
Cisco BPX 8600 Series Installation and Configuration
21-34
ABR Standard
VSVD
No
Yes
Flow control
external
No
segment
Yes
4
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 Network segment
ABR with ForeSight
VS ABR standard
VS ABR VD ABR with ForeSight
VS ABR VD VS ABR standard
ABR standard without VSVD
(without congestion flow control performed by network segment)
ABR with ForeSight
Flow control
1
external
No
segment
Yes
3
External segment
VD
VS ABR VD
VD VS ABR VD
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 21 Configuring ATM Connections