Port Mirroring
5-30 Port Configuration
Remote Port Mirroring
Remoteportmirroringisanextensiontoportmirroringwhichfacilitatessimultaneousmirroring
ofmultiplesourceportsonmultipleswitchesacrossanetworktooneormoreremotedestination
ports.
Remoteportmirroringinvolvesconfigurationofthefollowingportmirroringrelatedparameters:
1. Configurationofnormalportmirroringsourceportsandone
destinationportonallswitches,
asdescribedabove.
2. ConfigurationofamirrorVLAN,whichisauniqueVLANonwhichmirroredpackets
traverseacrossthenetwork.ThemirrorVLANhastobeconfiguredonALLswitchesacross
thenetworkalongwhichmirroredtraffictraverses,fromtheswitchwherethesourceports
residetotheswitchwherethemirroredpacketsaresniffedand/orcaptured.
Youmustensurethatswitchesinvolvedareprop erlyconfiguredtofacilitatecorrectremoteport
mirroringoperation.Thefollowingpointsinparticularneedtobeobserved:
•Onthesourceswitch,thecorrectdestinationportmustbechosentoensurethat
thereisan
egresspathfromthatporttothedesiredremotedestination(s).
•Allportsonthepathfromthesourceporttotheremotedestinationmustbemembersofthe
mirrorVLAN.
•Onswitchesonthepathfromthesourceporttotheremotedestination,egresstagginghasto
beenabledonpotentialegressportsforthemirrorVLAN.
Withtheintroductionofremoteportmirroring:
• ConfiguredmirrordestinationportswillNOTlosetheirswitchingorroutingpropertiesas
theydoonSecureStackA2,B2,orC2products.
•OnswitcheswherethemirrorVLANhasbeenconfigured,anytrafficonthat
VLANwillbe
floodedontheVLAN.Itwillneverbeunicast,evenifthesourceaddressofthetrafficasbeen
learnedontheswitch.
Purpose
Toreviewandconfigureportmirroringonthedevice.
Commands
Note: This functionality is not supported on SecureStack A2, B2, or C2 products.
For information about... Refer to page...
show port mirroring 5-31
set port mirroring 5-31
clear port mirroring 5-32
set mirror vlan 5-32
clear mirror vlan 5-33
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