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Knowledge Base

FAQ- How to check the ifindex of an interface on the switch

Publication Date:  2016-02-29  |   Views:  8555  |   Downloads:  0  |   Author:  SU1001835942  |   Document ID:  EKB1000097904


Issue Description

There are situations where we need to find out the corespondence between the ifindex and the interface names. For instance, if we receive a log on the switch that is refereing to a ifindex number but does not mention the exact interface name, we would need to know this corelation in order to indentify where the problem resides.


Feb  9 2016 08:47:12 xxxx %%01IFNET/4/BWRATE_OUT_RESUME(l)[0]:Interface output flow bandwidth usage was restored to the log threshold. (Interface=10, BandWidthUsage=85, LogThreshold=90)


To indentify the interface index of the interfaces, I can suggest the following solutions:

--Ru-Run the display rm interface command to check the ifindex of the intenterface directly in the CLI . By running this command the ifindex is shown in hex and you would need to convert it to decimal :


[R6_U11_S5710]display rm interface                                                                                                 


Name: GigabitEthernet0/0/5                                                                                                          

Physical IF Info:                                                                                                                   

 IfnetIndex: 0xA         //  convert the hex value to decimal to obtain the ifindex (0xA = 10 )                                                                                                  

 State: DOWN BCA MULT                                                                                                               

 Hardware Address: F84A-BFF0-2E70                                                                                                   

 Slot: 0(Logic Slot: 9)                                                                                                             

 IntType: 36, PriLog: 0, MTU: 1500, Reference Count: 1                                                                              

 Bandwidth: 0, 100000000                                                                                                            

 Baudrate: 0, 100000000                                                                                                             

 Delay: 0, Reliability: 0, Load: 0                                                                                                  

 LDP-ISIS sync capability: disabled                                                                                                 

 LDP-OSPF sync capability: disabled                                                                                                 

 InstanceID: 0, Instance Name: Public                                                                                               

 Age: 88548sec   

          -Use the below public OIDs to query the name and the ifindexes of the interfaces 

ifName is Oid . and ifIndex is oid .