3Com 3500 manual Ip rip poisonReverse, Enables or disables RIP Poison Reverse mode on the system

ip rip poisonReverse 457

ip rip poisonReverse

✓3500

✓9000

9400

3900

9300

For CoreBuilder 9000: Applies to Layer 3 switching modules only.

Enables or disables RIP Poison Reverse mode on the system.

Valid Minimum Abbreviation

ip ri poi

Important Considerations

■Your system always implements Split Horizon, a scheme that aims to avoid the problems that are associated with reverse-route updates (that is, the updates that are sent to a neighboring router that include the routes that are learned from that router). The scheme omits the routes that are learned from one neighbor in the updates that are sent to that neighbor (the reverse routes). Poison reverse works with Split Horizon as follows:

■When you enable Poison Reverse for use with the Split Horizon scheme (the default), the system advertises reverse routes in updates, but sets the metrics to 16 (infinity). Setting the metric to infinity breaks the loop immediately when two routers have routes that point to each other.

■When you disable Poison Reverse for the Split Horizon scheme, reverse routes are simply not advertised.

Options

Prompt	Description	Possible Values	[Default]
IP interfaces	Index number of the interfaces	■ One or more	Previous
	for which you want to set the	selectable	entry, if
	poison reverse mode	interface indexes	applicable

Poison Reverse Whether you want to

■all

■? (for a list of selectable interface indexes)

■disabled Current

mode	implement poison reverse for
	the selected interface

■ enabled

value