Cisco BPX 8620 Installation And Configuration Manual page 589

See VSI.
virtual switch
interface
See VSI2.
virtual switch
interface, protocol
version 2
See vt.
virtual terminal
A Virtual Trunks is a Virtual Path Connection which appears to VSI masters as ordinary trunk (except
virtual trunks
that the trunk supports 64k VCs at most). In a VSI platform, a virtual trunk endpoint has its own
logical interface.
voice network switching.
VNS
The adjunct processor used in the INS VNS application. The VNS is co-located with and connected
to an IGX switch. An INS application used to provide voice or data switched virtual circuits over a
Cisco WAN switching network for PBXes using either QSIG or DPNSS signaling.
See VAD.
voice activity
detection
See VNS.
voice network
switching
A Virtual Path is a bundle of 2
VP, VPC, VPI
first 12 bits of the VPCI. Most ATM switches can switch VPs using only a single cross-connect
(instead of up to 2
a Virtual Path Connection.
Virtual Path and Channel Identifier
VPCI
Each VC on a link has a unique, VPCI, which is a 28-bit number. The VPCI consists of a 12-bit VPI
concatenated with a 16-bit VCI.
virtual switch interface.
VSI
This is a proposed common control interface to all Cisco MSSBU switches. It embodies both
connection management and switch configuration discovery capabilities.
virtual switch interface, protocol version 2.
VSI 2
This is revision 2 of a proposed common control interface to all MSSBU switches. It embodies both
connection management and switch configuration discovery capabilities.
A controller, such as a PNNI SVC Controller, Portable Automatic Routing Management or Label
VSI Controller
Switch Controller, which controls a switch using the VSI.
A VSI master process implementing the master side of the VSI protocol in a VSI controller.
VSI Master
Sometimes the whole VSI controller might be referred to as a "VSI Master", but this is not strictly
correct.
1) A device that controls a VSI switch, for example, a VSI Label Switch Controller.
2) A process implementing the master side of the VSI protocol.
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
16
Virtual Connections with the same Virtual Path Identifier, that is, the
16
). An end-to-end sequence of VPs cross-connected at the intermediate switches is
Cisco BPX 8600 Series Installation and Configuration
Glossary
GL-23