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Enterasys SecureStack B3 User Manual

Enterasys SecureStack B3
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set spantree spanguard
SecureStack B3 Configuration Guide 7-25
Defaults
None.
Mode
Switchcommand,read‐only.
Example
ThisexampleshowshowtodisplaytheSpanGuardfunctionstatus:
B3(su)->show spantree spanguard
Spanguard is disabled
set spantree spanguard
UsethiscommandtoenableordisabletheSpanningTreeSpanGuardfunction.
Syntax
set spantree spanguard {enable | disable}
Parameters
Defaults
None.
Mode
Switchcommand,read‐write.
Usage
SpanGuardisdesignedtodisable,orlockoutan“edge”portwhenanunexpectedBPDUis
received.Theportcanbeconfiguredtobere‐enabledafterasettimeperiod,oronlyaftermanual
intervention.
Aportcanbedefinedasanedge(user)portusingthesetspantreeadminedge
command,
describedin“setspantreeadminedge”onpage 7‐37.Aportdesignatedasanedgeportis
expectedtobeconnectedtoaworkstationorotherend‐usertypeofdevice,andnottoanother
switchinthenetwork.WhenSpanguardisenabled,ifanon‐loopbackBPDUis
receivedonan
edgeport,theSpanningTreestateofthatportwillbechangedto“blocking”andwillnolonger
forwardtraffic.Theportwillremaindisableduntiltheamountoftimedefinedbysetspantree
spanguardtimeout(“setspantreespanguardtimeout”onpage 7‐26)haspassedsincethelastseen
BPDU,theportismanuallyunlocked(setorclearspantreespanguardlock,“clear/setspantree
spanguardlock”onpage 7‐28),theconfigurationoftheportischangedsoitisnotlongeranedge
port,ortheSpanGuardfunctionisdisabled.
SpanGuardisenabledanddisabledonlyonaglobal
basis(acrossthestack,ifapplicable).By
default,SpanGuardisdisabledandSpanGuardtrapsareenabled.
Example
ThisexampleshowshowtoenabletheSpanGuard function:
B3(rw)->set spantree spanguard enable
enable|disable EnablesordisablestheSpanGu ardfunction.

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Enterasys SecureStack B3 Specifications

General IconGeneral
Ports24 or 48 10/100/1000BASE-T ports
Forwarding Rate95.2 Mpps
LayerLayer 2/3
Power SupplyInternal
Redundant Power SupplyOptional
VLANs Supported4094
Uplink Ports4 SFP ports
Dimensions44.0 x 43.7 x 4.4 cm
Weight11.9 lbs (5.4 kg)
MAC Address Table Size16, 000 entries
Jumbo Frame SupportUp to 9, 216 bytes
Power over EthernetPoE+
Operating Temperature0°C to 50°C
Storage Temperature-20 °C to 70 °C
Humidity10% to 95% (non-condensing)

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