Cabletron Systems 9A100 1 IISP route across PNNI domain, 2 Routes needed for a second IISP switch

ATM Routing Switch Administration

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

A

LEC

Physical link

IISP route

IISP Domain

B

C

PNNI Domain LECS

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	A	B
LEC	LEC
	Physical link	C
	IISP route
		LECS

IISP Domain PNNI Domain

Figure 4-2 Routes needed for a second IISP switch

4-4 SmartSwitch 9A100 User Guide