Incorrect processing of IP Address with mask using type "IpAddr"

[edgarswed]

Host operating system:

Linux exporter-host 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

snmp_exporter version:

snmp_exporter, version 0.6.0 (branch: HEAD, revision: 4388d68)
build user: root@fd9cde4d0842
build date: 20170822-11:04:46
go version: go1.8.3

What did you do that produced an error?

Was trying to collect some snmp metrics from host. Faced an error:

server returned HTTP status 500 Internal Server Error

snmp_exporter error

An error has occurred during metrics gathering:

9 error(s) occurred:
* collected metric bgpPeerAdvertisedPrefixes label:<name:"BgpRemoteIP" value:"1.1.1.1" > gauge:<value:3403 >  was collected before with the same name and label values
* collected metric bgpPeerAcceptedPrefixes label:<name:"BgpRemoteIP" value:"1.1.1.1" > gauge:<value:78 >  was collected before with the same name and label values
* collected metric bgpPeerAcceptedPrefixes label:<name:"BgpRemoteIP" value:"1.1.1.3" > gauge:<value:11 >  was collected before with the same name and label values
* collected metric bgpPeerAdvertisedPrefixes label:<name:"BgpRemoteIP" value:"1.1.1.3" > gauge:<value:0 >  was collected before with the same name and label values
* collected metric bgpPeerDeniedPrefixes label:<name:"BgpRemoteIP" value:"1.1.1.3" > gauge:<value:0 >  was collected before with the same name and label values
* collected metric bgpPeerDeniedPrefixes label:<name:"BgpRemoteIP" value:"1.1.1.212" > gauge:<value:0 >  was collected before with the same name and label values
* collected metric bgpPeerAdvertisedPrefixes label:<name:"BgpRemoteIP" value:"1.1.1.212" > gauge:<value:0 >  was collected before with the same name and label values
* collected metric bgpPeerDeniedPrefixes label:<name:"BgpRemoteIP" value:"1.1.1.1" > gauge:<value:0 >  was collected before with the same name and label values
* collected metric bgpPeerAcceptedPrefixes label:<name:"BgpRemoteIP" value:"1.1.1.212" > gauge:<value:25 >  was collected before with the same name and label values

What did you expect to see?

Not see, but to collect metrics. And it seems that type: IpAddr doesn't correctly processes IP address with mask. It takes only first 4 octets after oid and ignores last two, which are /mask. So I'm getting an error because (for example) 1.1.1.212/128 and 1.1.1.212/1 become the same and looks like: 1.1.1.212

Part of snmp.yml config

    - name: bgpPeerAcceptedPrefixes
      oid: 1.3.6.1.4.1.9.9.187.1.2.4.1.1
      type: gauge
      indexes:
      - labelname: BgpRemoteIP
        type: IpAddr
    - name: bgpPeerDeniedPrefixes
      oid: 1.3.6.1.4.1.9.9.187.1.2.4.1.2
      type: gauge
      indexes:
      - labelname: BgpRemoteIP
        type: IpAddr
    - name: bgpPeerAdvertisedPrefixes
      oid: 1.3.6.1.4.1.9.9.187.1.2.4.1.6
      type: gauge
      indexes:
      - labelname: BgpRemoteIP
        type: IpAddr

snmpwalk response:

[root@exporter-host ~]# snmpwalk -v 2c -c secret target-host.domain 1.3.6.1.4.1.9.9.187.1.2.4.1.1
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.1.1.1.1.1.1.1 = Counter32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.1.1.1.1.1.1.128 = Counter32: 78
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.1.1.1.1.3.1.1 = Counter32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.1.1.1.1.3.1.128 = Counter32: 11
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.1.1.1.1.212.1.1 = Counter32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.1.1.1.1.212.1.128 = Counter32: 25
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.1.192.168.123.177.1.128 = Counter32: 123
[root@exporter-host ~]# snmpwalk -v 2c -c secret target-host.domain 1.3.6.1.4.1.9.9.187.1.2.4.1.2
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.2.1.1.1.1.1.1 = Gauge32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.2.1.1.1.1.1.128 = Gauge32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.2.1.1.1.3.1.1 = Gauge32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.2.1.1.1.3.1.128 = Gauge32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.2.1.1.1.212.1.1 = Gauge32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.2.1.1.1.212.1.128 = Gauge32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.2.192.168.123.177.1.128 = Gauge32: 109
[root@exporter-host ~]# snmpwalk -v 2c -c secret target-host.domain 1.3.6.1.4.1.9.9.187.1.2.4.1.6
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.6.1.1.1.1.1.1 = Gauge32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.6.1.1.1.1.1.128 = Gauge32: 3403
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.6.1.1.1.3.1.1 = Gauge32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.6.1.1.1.3.1.128 = Gauge32: 3403
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.6.1.1.1.212.1.1 = Gauge32: 0
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.6.1.1.1.212.1.128 = Gauge32: 3403
SNMPv2-SMI::enterprises.9.9.187.1.2.4.1.6.192.168.123.177.1.128 = Gauge32: 91

[SuperQ]

snmp.yml.gz
What is the generator.yml you used to produce this? It looks like your indexing is off compared to what I see from CISCO-BGP4-MIB

modules:
  cisco_bgp4:
    walk:
      - 1.3.6.1.4.1.9.9.187.1.2.4.1 # cbgpPeerAddrFamilyPrefixEntry

This produces these metrics:

cisco_bgp4:
  walk:
  - 1.3.6.1.4.1.9.9.187.1.2.4.1
  metrics:
  - name: cbgpPeerAcceptedPrefixes
    oid: 1.3.6.1.4.1.9.9.187.1.2.4.1.1
    type: counter
    help: Number of accepted route prefixes on this connection, which belong to an
      address family. - 1.3.6.1.4.1.9.9.187.1.2.4.1.1
    indexes:
    - labelname: bgpPeerRemoteAddr
      type: IpAddr
    - labelname: cbgpPeerAddrFamilyAfi
      type: gauge
    - labelname: cbgpPeerAddrFamilySafi
      type: gauge

See attached snmp.yaml

[edgarswed]

Not a bug. Your proper configuration solved the issue for me.
Thank you.