21-30
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 21 Configuring ATM Connections
ATM Connection Configuration
The characteristics of rt-VBR or nrt-VBR are supported by appropriately configuring the parameters of
the VBR connection.
Note
When configuring a rt-VBR connection, the trunk cell routing restriction prompt does not
occur, as rt-VBR connection routing is automatically restricted to ATM trunks.
Connection Criteria for real-time VBR and non-real-time VBR Connections
•
Default utilization for voice traffic is 100 percent.
•
For rt-VBR connections, all nodes must be running at least Rel. 9.2.20. The command line interface
will block you from adding rt-VBR connections in a network running pre-9.2.20 switch software
•
When upgrading to Rel. 9.2.20, all existing VBR connections are re-designated as nrt-VBR
connections.
•
BXM and UXM (IGX switch) cards can terminate rt-VBR connections and support rt-VBR queues.
•
On the BPX switch, BXM and BNI trunks support rt-VBR queues
•
On the IGX switch only, UXM trunks support rt-VBR queues.
•
In Release 9.2.20, you can add both rt-VBR and nrt-VBR connections.The parameter prompts are
the same for both rt-VBR and nrt-VBR, except for Trunk Cell Routing Restriction prompt. (For
rt-VBR connections, the "Trunk Cell Routing Restriction" prompt will not display because rt-VBR
traffic should only be routed over ATM trunks; rt-VBR traffic should not be routed over FastPacket
trunks.)
•
With Release 9.2.20, rt-vbr is supported only on single-segment connections (for example, CPE to
BXM to BXM to CPE). Later releases will support 2 and 3 segment connections, for example with
the UXM card on the IGX switch (2 segment: CPE to IGX feeder UXM to BXM to BXM to CPE)
or (3 segment: CPE to IGX feeder UXM to BXM to BXM to IGX feeder UXM to CPE).
The parameters for a VBR connection are shown in Figure 21-7 in the sequence in which they occur
during the execution of the addcon command. The VBR policing definitions are summarized in
Table 21-9.
Содержание BPX 8600 Series
Страница 43: ...P A R T 1 The BPX Switch ...
Страница 44: ......
Страница 151: ...P A R T 2 Installation ...
Страница 152: ......
Страница 261: ...P A R T 3 Initial Configuration and Network Management ...
Страница 262: ......
Страница 291: ...P A R T 4 Configuring Connections ...
Страница 292: ......
Страница 481: ...P A R T 5 Troubleshooting and Maintenance ...
Страница 482: ......
Страница 531: ...P A R T 6 BPX Specifications ...
Страница 532: ......
Страница 563: ...P A R T 7 Appendices ...
Страница 564: ......
Страница 624: ...Glossary 24 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...
Страница 630: ...Index 6 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...