Enterasys b5

Port Mirroring
Enterasys B5 CLI Reference 7-39
•Allportsonthepathfromthesou r ceporttotheremotedestinationmustbemembersofthe
mirrorVLAN.
•Onswitchesonthepathfromthesourceporttotheremotedestination,egresstagginghasto
beenabledonpotentialegressportsforthemirrorVLAN.
Withtheintroductionof
remoteportmirroring:
• ConfiguredmirrordestinationportswillNOTlosetheirswitchingorroutingpropertiesas
theydoonA2,B2,orC2products.
•OnswitcheswherethemirrorVLANhasbeenconfigured,anytrafficonthatVLANwillbe
floodedontheVLAN.Itwillneverbeunicast,evenif
thesourceaddressofthetrafficasbeen
learnedontheswitch.
Configuring SMON MIB Port Mirroring
Overview
SMONportmirroringsupportallowsyoutoredirecttrafficonportsremotelyusingSMONMIBs.
Thisisusefulfortroubleshootingorproblemsolvingwhennetworkmanagementthroughthe
consoleport,telnet,orSSHisnotfeasible.
Procedures
PerformthefollowingstepstoconfigureandmonitorportmirroringusingSMONMIBobjects.
Tocreateandenableaportmirroringinstance:
1. OpenaMIBbrowser,suchasNetsightMIBTools
2. IntheMIBdirectorytree,navigatetotheportCopyEntryfolderandexpandit.
3. SelecttheportCopyStatusMIB.
4. Enteradesiredsource
andtargetportintheInstancefieldusingtheformatsource.target.
Forexample,3.2wouldcreatearelationshipwheresourceportge.1.3wouldbemirroredto
targetportge.1.2.
5. EnterMIBoption4(createAndGo)andperformanSNMPSetoperation.
6. (Optional)UsetheCLItoverifytheportmirroringinstancehasbeen
createdandenabledas
showninthefollowingexample:
B5(su)->show port mirroring
Port Mirroring
==============
Source Port = ge.1.3
Target Port = ge.1.2
Frames Mirrored = Rx and Tx
Port Mirroring status enabled
Tocreateaportmirroringinstancewithoutautomaticallyenablingit:
1. Completesteps1‐4above.
2. EnterMIBoption5(createAndWait)andperformanSNMPSetoperation.
Note: In order to configure a port mirroring relationship, both source and destination interfaces must
be enabled and operational (up).