Digi PortServer TS 8 Configuration And Administration Manual page 46

regarded R2 as an alternate path to Net 1.
The second is called "poison reverse," which stipulates that routes are advertised as unreachable on
the interface on which the route is learned. Had poison reverse been used in the preceding example,
R2 would have advertised Net 1 as unreachable in its RIP updates to R1. Again R1 would never
have regarded R2 as an alternate path to Net 1.
PortServer TS 8/16 Participation in RIP Updates
PortServer TS 8/16' s participation in the exchange of RIP updates can be configured on the set
forwarding command. This command allows you to configure PortServer TS 8/16
• To neither receive nor propagate RIP updates (state=off), which means it must be configured for
static routes (set route command) if it is to do any routing at all.
• To receive RIP updates but not advertise its own routes using RIP (state=passive)
• To both receive and pass RIP updates (state=active)
9-4 About RIP Routing Updates