21-33
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Chapter 21 Configuring ATM Connections
ATM Connection Configuration
Figure 21-9 Meaning of VS/VD and Flow Control External Segments
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.
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 External segment
1
2
3
4
5
5
ABR with ForeSight
VS ABR standard VD
VS ABR standard VD
ABR with ForeSight
VS ABR VD
VS ABR VD
VS ABR VD
VS ABR VD
ABR standard without VSVD
(without congestion flow control performed by network segment)
ABR Standard
VSVD
No
2
No
Yes
1
ABR with ForeSight
No
Yes
Yes
Flow control
external
segment
4
Flow control
external
segment
3
S6158
Summary of Contents for BPX 8650
Page 49: ...P A R T 1 The BPX Switch ...
Page 50: ......
Page 159: ...P A R T 2 Installation ...
Page 160: ......
Page 273: ...P A R T 3 Initial Configuration and Network Management ...
Page 274: ......
Page 311: ...P A R T 4 Configuring Connections ...
Page 312: ......
Page 487: ...P A R T 5 Troubleshooting and Maintenance ...
Page 488: ......
Page 533: ...P A R T 6 BPX Specifications ...
Page 534: ......
Page 555: ...P A R T 7 Appendices ...
Page 556: ......