SNMP statistics for GRE Tunnel interface statistics - not possible during the day

[oliv Parcell]

Hello !

We use Cacti to get interfaces statistics of a ASR1002 router (version 03.04.02.S.151-3.S2).

A new GRE tunnel has been created, but unfortunately we are not able to get basic interface average during the day.

What is surprising is the fact the graphs are built on the night only.

 

It seems as soon as we exceed some level of Bandwidth (~ 700-800k) the tool does not get the information

The OID I try to get are ifHCInOctets (.1.3.6.1.2.1.31.1.1.1.6) and ifHCOutOctets (.1.3.6.1.2.1.31.1.1.1.10) and some other interface statistics for both 64 and 32 bits.

I am wondering if the default BW of 100kbit/sec for the Tu0 is playing a role here =>

=========================================

Tunnel0 is up, line protocol is up

  Hardware is Tunnel

  Internet address is 172.18.70.73/30

  MTU 17916 bytes, BW 100 Kbit/sec, DLY 50000 usec,

     reliability 255/255, txload 255/255, rxload 255/255

  Encapsulation TUNNEL, loopback not set

  Keepalive set (5 sec), retries 3

  Tunnel source X.X.X.X, destination X.X.X.X

  Tunnel protocol/transport GRE/IP

  Key disabled, sequencing disabled

  Checksumming of packets disabled

  Tunnel TTL 255, Fast tunneling enabled

  Tunnel transport MTU 1476 bytes

  Tunnel transmit bandwidth 8000 (kbps)

  Tunnel receive bandwidth 8000 (kbps)

  Last input never, output 18:34:15, output hang never

  Last clearing of "show interface" counters never

  30 second input rate 5423000 bits/sec, 616 packets/sec

  30 second output rate 864000 bits/sec, 468 packets/sec

=========================================

Does someone has encountered this issue before.

Any suggestion would be much appreciated.

Best regards.

Oliv.

[Alexey Leontiev]

Hello.

You have solved this problem?

[oliv Parcell]

Hello,

It was an issue on the Cacti side. After the Cacti team has recreated the graph, the issue has been fixed.

Best regards.

Oliv.

[Petr Solovev]

Hello,
I think it is a common issue for CACTI and some virtual interfaces. 
When Cacti generates DataSource as it described in DataQueries it uses |query_ifSpeed| for rrd_maximum field of the DataSource. Then somthing going wrong with interface speed determination.

In this case problem in the "SNMP - Interface Statistics" DataQuerу. And you can try to remove rule for the rrd_maximum field.

[charalambos.georkas]

Hi Oliv,

Cacti will get interface bandwidth from the router which in this case is 8Mbps. Any traffic above that will not be represented on the graph.

Solution to this is:

a) find which .rrd file corresponds to this graph

b) ssh to cacti server and go to /usr/share/cacti/site/rra

c) Run the 2 commands below for each Tunnel interface graph (to set graph both incoming and outgoing limit to 400 Mbps):

rrdtool tune <your-rrd-name>.rrd -a traffic_in:400000000
rrdtool tune <your-rrd-name>.rrd -a traffic_out:400000000