Realtime NetFlow Analyzer - Cisco Ports

First thing, we are new to this forum so if this is not the correct place to post this question can someone tell us where?

We just installed SolarWinds Realtime NetFlow Analyzer tool and trying to monitor one router.  When we launch the tool and select the router we see two interfaces

Interface 13

Interface 21

How can we determine what interface above corresponds to which interface on the router?  What do the numbers 13 and 21 represent?

Here is a partial configuration from our Cisco 3725:

!

interface FastEthernet0/0

description local

no ip address

ip flow ingress

ip flow egress

duplex auto

speed auto

!

interface FastEthernet0/0.1

description Legacy Network - temporary

encapsulation dot1Q 1 native

ip address 172.26.58.1 255.255.255.0 secondary

ip address 172.26.55.1 255.255.255.0

ip helper-address 10.223.250.60

ip flow ingress

!

!

!

interface FastEthernet0/1

description wan

no ip address

duplex auto

speed auto

!

interface FastEthernet0/1.2220

description primary

encapsulation dot1Q 2220

ip address 10.0.18.178 255.255.255.248

ip helper-address 10.23.250.60

ip flow ingress

ip flow egress

!

  • Your configuration is good, provided you've also set up the SNMP. It will take a good several minutes (possibly 10 or more) until the interface names correctly populate. You may need to close and reopen the tool (or at least collapse and re-expand the tree) to see it.

  • We waited a while and nothing changed.  So, we removed the IP FLOW INGRESS and IP FLOW EGRESS commands from all interfaces except the one below:

    !

    interface FastEthernet0/0

    description <S/N FTX1026A645>

    no ip address

    ip flow ingress

    ip flow egress

    duplex auto

    speed auto

    !

    interface FastEthernet0/0.1

    description Legacy Network - temporary

    encapsulation dot1Q 1 native

    ip address 172.26.58.1 255.255.255.0 secondary

    ip address 172.26.55.1 255.255.255.0

    ip helper-address 10.223.250.60

    ip flow ingress

    ip flow egress

    !

    !

    When we launch the Realtime Netflow Analyzer  it show two interfaces:

    Interface 13

    Interface 21

    Both interfaces show Flow Type - Netflow.

    Why is there two interfaces and what do the numbers 13 and 21 mean?