Installation Manual

IBRInstallationGuide
 Page33of40 Doc#770‐00001‐13
 Sept.21,2014
Bydefault,allIBREthernetportsareassignednativelytoVLAN1.Toavoidcreatingaloop,configureatrunk
nativeinterfaceongigabitEthernet3asshowninthefollowingexample:
IBR101(config)#interfacevlan2
IBR101(config‐vlan2)#noshutdown
IBR101(config‐vlan2)#exit
IBR101(config)#interfacegigabitEthernet3
IBR101(config‐if‐ge3)#noswitchporttrunknativevlan1
IBR101(config‐if‐ge3)#switchporttrunknativevlan2
IBR101(config‐if‐ge3)
#docopyrunning‐configstartup‐config
Itisnecessarytoperformthissetupononlyonesideofthelink,unlessthereisuntaggedtrafficonthelink,in
whichcaseitshouldbeperformedonbothsidesofthelink.
NetworkloopsalsocanbeavoidedbycreatingaseparatemanagementinterfaceoneachIBR.SeetheIBR
Administration&CommandLineInterfaceGuideforinformationaboutcreatingamanagementinterface.
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A4. LinkIsEstablishedButNotPassingTraffic
Confirmthatalinkhasbeenestablishedby(i)pingingtheoppositeend,(ii)checkingtheinterfacecounters,
and/or(iii)viewingtheradiolinkstatususingthefollowingcommand:
IBR101#showinterfaceradio0status
Ifalinkhasbeenestablished,butwillnotpasstraffic,dothefollowing:
a. ConfirmthatIBRisconfiguredtopassallVLANtraffic,regardlessofVLAN,byusingthebridge
commandasshownbelow.
IBR101(config)#bridgelinklocalframesgigabitethernet1
DothisonbothsidesofthelinkusingtheconnecteddataportonVLAN2which,inthiscase,isge1.
b. Checksyslogformessagesthatindicatethatthelinkisgoingupanddown.
IBR101#showloggingactive
NOTE:UseCtrl‐Ctostopthedisplayfromcontinuingtoscroll.
c. ConfirmthatMTUissetcorrectlyonbothIBRs.
IBR101(config)#mtu9712
NOTE:WhenMTUissetto9712,itwillbe9712betweenthewiredswitchports;however,theover‐
the‐airMTUislimitedto2599.
d. Checkhistorylogsforradioconditionspriortothetimewhenthelinkwouldnotpasstraffic.
IBR101#showinterfaceradio0history
mcs
IBR101#showinterfaceradio0historybler
IfhistoryshowsthatMCSdroppedto1andBLERincreasedbeforethelinkstoppedpassingtraffic,the
causemightbeinterference.
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A5. IBRCannotBeReachedViatheNetwork
FollowthesestepsifIBRcannotbereachedviathenetwork.