Enterasys SecureStack B3

split-horizon poison
SecureStack B3 Configuration Guide 18-7
Example
ThisexampleshowshowtodisableRIPautomaticroutesummarization:
B3(su)->router(Config)#router rip
B3(su)->router(Config-router)#no auto-summary
split-horizon poison
Usethiscommandtoenableordisablesplithorizonpoison‐reversemodeforRIPpackets.Theno
formofthiscommanddisablessplithorizonpoisonreverse.
Syntax
split-horizon poison
no split-horizon poison
Parameters
None.
Defaults
None.
Mode
Routerconfiguration:B3(su)‐>router(Config‐router)#
Usage
Splithorizonpreventspacketsfromexitingthroughthesameinterfaceonwhichtheywere
received.Poison‐reverseexplicitlyindicatesthatanetworkisunreachable,ratherthanimplyingit
bynotincludingthenetworkinroutingupdates.Thisfunctionisdisabledbydefault.
Example
ThisexampleshowshowtodisablesplithorizonpoisonreverseforRIPpacketstransmittedon
theVLAN1interface:
B3(su)->router(Config)#router rip
B3(su)->Router1(Config-router)#no split-horizon poison
passive-interface
UsethiscommandtopreventRIPfromtransmittingupdatepacketsonaninterface.Thenoform
ofthiscommanddisablespassiveinterface.
Syntax
passive-interface vlan vlan-id
no passive-interface vlan vlan-id
Parameters
vlanvlan‐id Specifiesthenum beroftheVLANtomakeapassiveinterface.ThisVLAN
mustbeconfiguredforIProutingasdescribedin“Pre‐Routing
ConfigurationTasks”onpage16‐1.