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Chapter 1
Introduction to PNNI
Figure 1-6
PNNI Internetworking with IISP
Interim Inter-Switch Protocol (IISP) is the predecessor to AINI and serves the same purpose as AINI,
which is to link two independent PNNI networks. Unlike AINI, IISP does not support all UNI 4.0
features.
Standards-based IISP supports SVC and SVP connections. Cisco has enhanced IISP to also support
Note
CBR1, rt-VBR1, rt-VBR2, rt-VBR3, nrt-VBR1, nrt-VBR2, and ABR SPVC and SPVP connections.
If the border nodes between two independent PNNI networks support AINI, you should use AINI for any
links between them. The only time you should use IISP is when one or both of the border nodes do not
support AINI.
Part Number OL-3847-01 Rev. D0, April, 2004
Example PNNI Internetworking with AINI Topology
PNNI network
Cisco PNNI Network Planning Guide for MGX and SES Products, Release 5
AINI
PNNI network
AINI
PNNI Internetworking with IISP
1-9
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