Figure 4-1 Iisp Route Across Pnni Domain; Figure 4-2 Routes Needed For A Second Iisp Switch - Cabletron Systems SmartCell 6A000 User Manual

ATM Routing
Dotted lines in the diagrams below represent one-way routes to the devices
Note
pointed to by the arrowheads. Each route is defined on the device from which the
dotted line originates.

Figure 4-1 IISP route across PNNI domain

A second IISP device (Switch D) is added behind Switch A. If Switch D also needs to reach Switch C for LECS
support, you must define additional IISP routes between Switches D and C, B and D, and A and D. Figure 4-2 shows
the typical "route to every point reached" IISP topology.
D
LEC

Figure 4-2 Routes needed for a second IISP switch

4-4 SmartCell 6A000 User Guide
A
LEC
Physical link
IISP route
IISP Domain
A
LEC
Physical link
IISP route
IISP Domain
B
PNNI Domain
B
PNNI Domain
Switch Administration
C
LECS
C
LECS