Junos OS

When I perform a network discovery using SNMP, the reported switch port name on my EX2200 is 513, 520, 523, and 561, which correspond to ports ge0/0/0.0, ge-0/0/7.0, ge-0/0/10.0, and ge-0/1/0.0.  Using the same software (Solarwinds NTM, LanTopoLog, 10-strike, etc.) on other switches show actual port numbers such as 1, 5, 10, etc.  Is there a way to set the EX to report the port number instead of the 5xx numbers or is there a reference to what the 5xx numbers are?

I discovered that the value reported by the discovery tools is the SNMP ifIndex value which can be found using "show interfaces"

Physical interface: ge-0/0/2, Enabled, Physical link is Down
Interface index: 132, SNMP ifIndex: 506

Use this command "set protocols lldp port-id-subtype interface-name"

https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/port-id-subtype-edit-protocols-lldp.html

HI!

Basically there is no such way to assign the SNMP ifindex manually. So unforatunaely , its not possible to acheive what you are looking for (i.e. SNMP index like 1,5,10 ect. )

But use can use this command to find out which physical interface belongs to 5XX

>show interfaces snmp-index 5XX

to get a list use this :

>show snmp mib walk decimal 1.3.6.1.2.1.31.1.1.1.1

Here is some explanation. 

The index is not predefined, it is monitored and created by mib2d dynamically. When a new interface is created in the system, mib2d checks for an entry of the interface in the file /var/db/dcd.snmp_ix. If the entry for this index is present, the system then picks the SNMP interface index value from this file, or else it assigns a new interface index value and writes it to this file.

Since the file is maintained across reboots, the next time the same interface is deleted and re-created, the SNMP ifIndex does not change. The assignment of the interface index primarily depends on the order in which it is created. Thus, the value is different in a different machine.

Hope this helps !!

(Please remember to accept this as a solution if this helps)

Regards

Arpit 

Hi! 

Maybe you could try with this OID  1.3.6.1.2.1.31.1.1.1.1, which will give you the SNMP index to interface name mapping. Not sure if this helps. 

Example from my lab:

labroot@kamas-re0> show snmp mib walk 1.3.6.1.2.1.31.1.1.1.1
ifName.1 = fxp0
ifName.4 = lsi
ifName.5 = dsc
ifName.6 = lo0
ifName.7 = tap
ifName.8 = gre
ifName.9 = ipip
ifName.10 = pime
ifName.11 = pimd
ifName.12 = mtun
ifName.13 = fxp0.0
ifName.16 = lo0.0
ifName.17 = em0
ifName.18 = em0.0
ifName.21 = lo0.16384
ifName.22 = lo0.16385
ifName.23 = em1
ifName.24 = em1.0
ifName.501 = cbp0
ifName.502 = demux0
ifName.503 = esi
ifName.504 = irb
ifName.505 = jsrv
ifName.506 = jsrv.1
ifName.507 = pip0
ifName.508 = pp0
ifName.509 = rbeb
ifName.510 = vtep
ifName.511 = pfh-3/0/0
ifName.512 = pfe-3/0/0
ifName.513 = pfe-3/0/0.16383
ifName.514 = pfh-3/0/0.16383
ifName.515 = pfh-3/0/0.16384
ifName.516 = ms-3/0/0
ifName.517 = pc-3/0/0
ifName.518 = mams-3/0/0
ifName.519 = ms-3/1/0
ifName.520 = pc-3/1/0
ifName.521 = mams-3/1/0

Best

Mu

Please try loading this OID 1.3.6.1.2.1.31.1.1.1.1 to the Discovery tool and check if that helps