This article shows how to retrieve interface names that are mapped to a specific VLAN using SNMP MIB.

Using SNMP MIB, a user can obtain details of the number of interfaces along with the names that are mapped to a VLAN on EX series.

Example: Use vlan20 , and interfaces ge-0/0/39 and  ge-0/0/46 , which are mapped to that VLAN:

      root@WIRE>   show   vlans                         vlan20
      Name         Tag    Interfaces
      vlan20       20     ge-0/0/39.0*, ge-0/0/46.0*

1. Use jnxExVlanName to get the index of the specific VLAN:
   
    root@WIRE> show snmp mib walk jnxExVlanName
    jnxExVlanName.2 = Test
    jnxExVlanName.4 = default
    jnxExVlanName.5 = vlan20     ----> 5 is the index for vlan20
    jnxExVlanName.10 = vt
    jnxExVlanName.11 = wireless
    jnxExVlanName.12 = vlan30

• Use jnxExVlanPortStatus to get the number and status of the interface mapped to the VLAN:
  
      root@WIRE> show snmp mib walk jnxExVlanPortStatus .5
     jnxExVlanPortStatus.5.552 = 3
    jnxExVlanPortStatus.5.559 = 3

•   Use dot1dBasePortIfIndex to obtain the ifindex value:
  
       root@WIRE> show snmp mib get dot1dBasePortIfIndex. 552  
    dot1dBasePortIfIndex.552 = 589      ----> index for interface ge-0/0/39

• Use ifDescr to provide the interface name for that specific index:
  
         root@WIRE> show snmp mib get ifDescr. 589
    ifDescr. 589 = ge-0/0/39.0

Retrieve information of the other interface mapped to the VLAN: