Using mrtg to monitor cable modem utilization

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Using mrtg to monitor cable modem utilization

Alex Regan
[first time went without a subject somehow...]

Hi,

Anyone still using mrtg these days? I'm trying to set up mrtg on my
fedora25 system connected to a cable modem (35Mbit up, 5Mbit down) on
one side and a gigabit ethernet on the other and can't figure out how
to reflect that in the config file.

Maybe you have an idea for monitoring utilization using another method?

I'm trying to set it up to determine utilization, so it's important to
define the upper bound for both upload and download. Is this possible?
If I recall, isn't there a way to define input max and output max?

I've run the following cfgmaker command:

# cfgmaker --ifref=descr --ifdesc=alias -zero-speed=5000000
[hidden email]

Here is the ifconfig output for my system. I've also included the
generated cfgmaker output (with 'example' as my domain) below. I don't
understand why it's defined eth0 and eth1 as 125MBit when it's
connected to a bridge on a gigabit network, and why it's chosen
625kbit for br0 when I've tried to define it as 5Mbit.

br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 68.111.193.42  netmask 255.255.255.248  broadcast 68.111.193.47
        inet6 fe80::ec4:7aff:fea9:18de  prefixlen 64  scopeid 0x20<link>
        ether 0c:c4:7a:a9:18:de  txqueuelen 1000  (Ethernet)
        RX packets 5891321629  bytes 2564661840218 (2.3 TiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3670532823  bytes 22827372375556 (20.7 TiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

br0:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 68.111.193.44  netmask 255.255.255.248  broadcast 68.111.193.47
        ether 0c:c4:7a:a9:18:de  txqueuelen 1000  (Ethernet)

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 0c:c4:7a:a9:18:de  txqueuelen 1000  (Ethernet)
        RX packets 6303244831  bytes 2755299573703 (2.5 TiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 18098110833  bytes 24060466118480 (21.8 TiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device memory 0xfb120000-fb13ffff

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.1  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::ec4:7aff:fea9:18df  prefixlen 64  scopeid 0x20<link>
        ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
        RX packets 22104249713  bytes 13271044125506 (12.0 TiB)
        RX errors 0  dropped 0  overruns 44  frame 0
        TX packets 16730830652  bytes 3413227489426 (3.1 TiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device memory 0xfb100000-fb11ffff

eth1:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.2  netmask 255.255.255.0  broadcast 192.168.1.255
        ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
        device memory 0xfb100000-fb11ffff

eth1:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.100  netmask 255.255.255.0  broadcast 192.168.1.255
        ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
        device memory 0xfb100000-fb11ffff

eth1:2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.6.1  netmask 255.255.255.0  broadcast 192.168.6.255
        ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
        device memory 0xfb100000-fb11ffff

eth1:3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.101  netmask 255.255.255.0  broadcast 192.168.1.255
        ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
        device memory 0xfb100000-fb11ffff

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 55198240  bytes 9250184967 (8.6 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 55198240  bytes 9250184967 (8.6 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:63:b9:2a  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::fc54:ff:fe35:dd67  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:35:dd:67  txqueuelen 1000  (Ethernet)
        RX packets 174594324  bytes 160713095174 (149.6 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 200965168  bytes 104887504535 (97.6 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vnet1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::fc54:ff:fe35:dd66  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:35:dd:66  txqueuelen 1000  (Ethernet)
        RX packets 16552006  bytes 139318192739 (129.7 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 30615686  bytes 3092083364 (2.8 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Here is the mrtg.cfg with the disabled interfaces and unnecessary HTML
removed. I've also included the cfgmaker snmp info below.

EnableIPv6: no
Target[orion.example.com_eth0]: \eth0:[hidden email]:
SetEnv[orion.example.com_eth0]: MRTG_INT_IP="No Ip" MRTG_INT_DESCR="eth0"
MaxBytes[orion.example.com_eth0]: 125000000
Title[orion.example.com_eth0]: eth0 -- orion.inside.example.com
PageTop[orion.example.com_eth0]: <h1>eth0 -- orion.inside.example.com</h1>

Target[orion.example.com_eth1]: \eth1:[hidden email]:
SetEnv[orion.example.com_eth1]: MRTG_INT_IP="192.168.6.1" MRTG_INT_DESCR="eth1"
MaxBytes[orion.example.com_eth1]: 125000000
Title[orion.example.com_eth1]: eth1 -- orion.inside.example.com
PageTop[orion.example.com_eth1]: <h1>eth1 -- orion.inside.example.com</h1>

Target[orion.example.com_br0]: \br0:[hidden email]:
SetEnv[orion.example.com_br0]: MRTG_INT_IP="68.111.193.42" MRTG_INT_DESCR="br0"
MaxBytes[orion.example.com_br0]: 625000
Title[orion.example.com_br0]: br0 -- orion.inside.example.com
PageTop[orion.example.com_br0]: <h1>br0 -- orion.inside.example.com</h1>

Target[orion.example.com_vnet0]: \vnet0:[hidden email]:
SetEnv[orion.example.com_vnet0]: MRTG_INT_IP="No Ip" MRTG_INT_DESCR="vnet0"
MaxBytes[orion.example.com_vnet0]: 1250000
Title[orion.example.com_vnet0]: vnet0 -- orion.inside.example.com
PageTop[orion.example.com_vnet0]: <h1>vnet0 -- orion.inside.example.com</h1>

Target[orion.example.com_vnet1]: \vnet1:[hidden email]:
SetEnv[orion.example.com_vnet1]: MRTG_INT_IP="No Ip" MRTG_INT_DESCR="vnet1"
MaxBytes[orion.example.com_vnet1]: 1250000
Title[orion.example.com_vnet1]: vnet1 -- orion.inside.example.com
PageTop[orion.example.com_vnet1]: <h1>vnet1 -- orion.inside.example.com</h1>

--base: Get Device Info on [hidden email]:
--base: Vendor Id: Unknown Vendor - 1.3.6.1.4.1.8072.3.2.10
--base: Populating confcache
--base: Get Interface Info
--base: Walking ifIndex
--snpd:   [hidden email]: -> 1 -> ifIndex = 1
--snpd:   [hidden email]: -> 2 -> ifIndex = 2
--snpd:   [hidden email]: -> 3 -> ifIndex = 3
--snpd:   [hidden email]: -> 4 -> ifIndex = 4
--snpd:   [hidden email]: -> 5 -> ifIndex = 5
--snpd:   [hidden email]: -> 6 -> ifIndex = 6
--snpd:   [hidden email]: -> 7 -> ifIndex = 7
--snpd:   [hidden email]: -> 8 -> ifIndex = 8
--snpd:   [hidden email]: -> 9 -> ifIndex = 9
--base: Walking ifType
--snpd:   [hidden email]: -> 1 -> ifType = 24
--snpd:   [hidden email]: -> 2 -> ifType = 6
--snpd:   [hidden email]: -> 3 -> ifType = 6
--snpd:   [hidden email]: -> 4 -> ifType = 6
--snpd:   [hidden email]: -> 5 -> ifType = 131
--snpd:   [hidden email]: -> 6 -> ifType = 6
--snpd:   [hidden email]: -> 7 -> ifType = 6
--snpd:   [hidden email]: -> 8 -> ifType = 6
--snpd:   [hidden email]: -> 9 -> ifType = 6
--base: Walking ifAdminStatus
--snpd:   [hidden email]: -> 1 -> ifAdminStatus = 1
--snpd:   [hidden email]: -> 2 -> ifAdminStatus = 1
--snpd:   [hidden email]: -> 3 -> ifAdminStatus = 1
--snpd:   [hidden email]: -> 4 -> ifAdminStatus = 1
--snpd:   [hidden email]: -> 5 -> ifAdminStatus = 2
--snpd:   [hidden email]: -> 6 -> ifAdminStatus = 1
--snpd:   [hidden email]: -> 7 -> ifAdminStatus = 2
--snpd:   [hidden email]: -> 8 -> ifAdminStatus = 1
--snpd:   [hidden email]: -> 9 -> ifAdminStatus = 1
--base: Walking ifOperStatus
--snpd:   [hidden email]: -> 1 -> ifOperStatus = 1
--snpd:   [hidden email]: -> 2 -> ifOperStatus = 1
--snpd:   [hidden email]: -> 3 -> ifOperStatus = 1
--snpd:   [hidden email]: -> 4 -> ifOperStatus = 1
--snpd:   [hidden email]: -> 5 -> ifOperStatus = 2
--snpd:   [hidden email]: -> 6 -> ifOperStatus = 2
--snpd:   [hidden email]: -> 7 -> ifOperStatus = 2
--snpd:   [hidden email]: -> 8 -> ifOperStatus = 1
--snpd:   [hidden email]: -> 9 -> ifOperStatus = 1
--base: Walking ifMtu
--snpd:   [hidden email]: -> 1 -> ifMtu = 65536
--snpd:   [hidden email]: -> 2 -> ifMtu = 1500
--snpd:   [hidden email]: -> 3 -> ifMtu = 1500
--snpd:   [hidden email]: -> 4 -> ifMtu = 1500
--snpd:   [hidden email]: -> 5 -> ifMtu = 1332
--snpd:   [hidden email]: -> 6 -> ifMtu = 1500
--snpd:   [hidden email]: -> 7 -> ifMtu = 1500
--snpd:   [hidden email]: -> 8 -> ifMtu = 1500
--snpd:   [hidden email]: -> 9 -> ifMtu = 1500
--base: Walking ifSpeed
--snpd:   [hidden email]: -> 1 -> ifSpeed = 10000000
--snpd:   [hidden email]: -> 2 -> ifSpeed = 1000000000
--snpd:   [hidden email]: -> 3 -> ifSpeed = 1000000000
--snpd:   [hidden email]: -> 4 -> ifSpeed = 0
--snpd:   [hidden email]: -> 5 -> ifSpeed = 0
--snpd:   [hidden email]: -> 6 -> ifSpeed = 0
--snpd:   [hidden email]: -> 7 -> ifSpeed = 10000000
--snpd:   [hidden email]: -> 8 -> ifSpeed = 10000000
--snpd:   [hidden email]: -> 9 -> ifSpeed = 10000000
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Re: Using mrtg to monitor cable modem utilization

Rick Stevens-4
On 06/07/2017 09:15 AM, Alex wrote:

> [first time went without a subject somehow...]
>
> Hi,
>
> Anyone still using mrtg these days? I'm trying to set up mrtg on my
> fedora25 system connected to a cable modem (35Mbit up, 5Mbit down) on
> one side and a gigabit ethernet on the other and can't figure out how
> to reflect that in the config file.
>
> Maybe you have an idea for monitoring utilization using another method?
>
> I'm trying to set it up to determine utilization, so it's important to
> define the upper bound for both upload and download. Is this possible?
> If I recall, isn't there a way to define input max and output max?
>
> I've run the following cfgmaker command:
>
> # cfgmaker --ifref=descr --ifdesc=alias -zero-speed=5000000
> [hidden email]
>
> Here is the ifconfig output for my system. I've also included the
> generated cfgmaker output (with 'example' as my domain) below. I don't
> understand why it's defined eth0 and eth1 as 125MBit when it's
> connected to a bridge on a gigabit network, and why it's chosen
> 625kbit for br0 when I've tried to define it as 5Mbit.
>
> br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet 68.111.193.42  netmask 255.255.255.248  broadcast 68.111.193.47
>         inet6 fe80::ec4:7aff:fea9:18de  prefixlen 64  scopeid 0x20<link>
>         ether 0c:c4:7a:a9:18:de  txqueuelen 1000  (Ethernet)
>         RX packets 5891321629  bytes 2564661840218 (2.3 TiB)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 3670532823  bytes 22827372375556 (20.7 TiB)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> br0:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet 68.111.193.44  netmask 255.255.255.248  broadcast 68.111.193.47
>         ether 0c:c4:7a:a9:18:de  txqueuelen 1000  (Ethernet)
>
> eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         ether 0c:c4:7a:a9:18:de  txqueuelen 1000  (Ethernet)
>         RX packets 6303244831  bytes 2755299573703 (2.5 TiB)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 18098110833  bytes 24060466118480 (21.8 TiB)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>         device memory 0xfb120000-fb13ffff
>
> eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet 192.168.1.1  netmask 255.255.255.0  broadcast 192.168.1.255
>         inet6 fe80::ec4:7aff:fea9:18df  prefixlen 64  scopeid 0x20<link>
>         ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
>         RX packets 22104249713  bytes 13271044125506 (12.0 TiB)
>         RX errors 0  dropped 0  overruns 44  frame 0
>         TX packets 16730830652  bytes 3413227489426 (3.1 TiB)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>         device memory 0xfb100000-fb11ffff
>
> eth1:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet 192.168.1.2  netmask 255.255.255.0  broadcast 192.168.1.255
>         ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
>         device memory 0xfb100000-fb11ffff
>
> eth1:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet 192.168.1.100  netmask 255.255.255.0  broadcast 192.168.1.255
>         ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
>         device memory 0xfb100000-fb11ffff
>
> eth1:2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet 192.168.6.1  netmask 255.255.255.0  broadcast 192.168.6.255
>         ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
>         device memory 0xfb100000-fb11ffff
>
> eth1:3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet 192.168.1.101  netmask 255.255.255.0  broadcast 192.168.1.255
>         ether 0c:c4:7a:a9:18:df  txqueuelen 1000  (Ethernet)
>         device memory 0xfb100000-fb11ffff
>
> lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
>         inet 127.0.0.1  netmask 255.0.0.0
>         inet6 ::1  prefixlen 128  scopeid 0x10<host>
>         loop  txqueuelen 1  (Local Loopback)
>         RX packets 55198240  bytes 9250184967 (8.6 GiB)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 55198240  bytes 9250184967 (8.6 GiB)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
>         inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
>         ether 52:54:00:63:b9:2a  txqueuelen 1000  (Ethernet)
>         RX packets 0  bytes 0 (0.0 B)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 0  bytes 0 (0.0 B)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet6 fe80::fc54:ff:fe35:dd67  prefixlen 64  scopeid 0x20<link>
>         ether fe:54:00:35:dd:67  txqueuelen 1000  (Ethernet)
>         RX packets 174594324  bytes 160713095174 (149.6 GiB)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 200965168  bytes 104887504535 (97.6 GiB)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> vnet1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet6 fe80::fc54:ff:fe35:dd66  prefixlen 64  scopeid 0x20<link>
>         ether fe:54:00:35:dd:66  txqueuelen 1000  (Ethernet)
>         RX packets 16552006  bytes 139318192739 (129.7 GiB)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 30615686  bytes 3092083364 (2.8 GiB)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> Here is the mrtg.cfg with the disabled interfaces and unnecessary HTML
> removed. I've also included the cfgmaker snmp info below.
>
> EnableIPv6: no
> Target[orion.example.com_eth0]: \eth0:[hidden email]:
> SetEnv[orion.example.com_eth0]: MRTG_INT_IP="No Ip" MRTG_INT_DESCR="eth0"
> MaxBytes[orion.example.com_eth0]: 125000000
> Title[orion.example.com_eth0]: eth0 -- orion.inside.example.com
> PageTop[orion.example.com_eth0]: <h1>eth0 -- orion.inside.example.com</h1>
>
> Target[orion.example.com_eth1]: \eth1:[hidden email]:
> SetEnv[orion.example.com_eth1]: MRTG_INT_IP="192.168.6.1" MRTG_INT_DESCR="eth1"
> MaxBytes[orion.example.com_eth1]: 125000000
> Title[orion.example.com_eth1]: eth1 -- orion.inside.example.com
> PageTop[orion.example.com_eth1]: <h1>eth1 -- orion.inside.example.com</h1>
>
> Target[orion.example.com_br0]: \br0:[hidden email]:
> SetEnv[orion.example.com_br0]: MRTG_INT_IP="68.111.193.42" MRTG_INT_DESCR="br0"
> MaxBytes[orion.example.com_br0]: 625000
> Title[orion.example.com_br0]: br0 -- orion.inside.example.com
> PageTop[orion.example.com_br0]: <h1>br0 -- orion.inside.example.com</h1>
>
> Target[orion.example.com_vnet0]: \vnet0:[hidden email]:
> SetEnv[orion.example.com_vnet0]: MRTG_INT_IP="No Ip" MRTG_INT_DESCR="vnet0"
> MaxBytes[orion.example.com_vnet0]: 1250000
> Title[orion.example.com_vnet0]: vnet0 -- orion.inside.example.com
> PageTop[orion.example.com_vnet0]: <h1>vnet0 -- orion.inside.example.com</h1>
>
> Target[orion.example.com_vnet1]: \vnet1:[hidden email]:
> SetEnv[orion.example.com_vnet1]: MRTG_INT_IP="No Ip" MRTG_INT_DESCR="vnet1"
> MaxBytes[orion.example.com_vnet1]: 1250000
> Title[orion.example.com_vnet1]: vnet1 -- orion.inside.example.com
> PageTop[orion.example.com_vnet1]: <h1>vnet1 -- orion.inside.example.com</h1>
>
> --base: Get Device Info on [hidden email]:
> --base: Vendor Id: Unknown Vendor - 1.3.6.1.4.1.8072.3.2.10
> --base: Populating confcache
> --base: Get Interface Info
> --base: Walking ifIndex
> --snpd:   [hidden email]: -> 1 -> ifIndex = 1
> --snpd:   [hidden email]: -> 2 -> ifIndex = 2
> --snpd:   [hidden email]: -> 3 -> ifIndex = 3
> --snpd:   [hidden email]: -> 4 -> ifIndex = 4
> --snpd:   [hidden email]: -> 5 -> ifIndex = 5
> --snpd:   [hidden email]: -> 6 -> ifIndex = 6
> --snpd:   [hidden email]: -> 7 -> ifIndex = 7
> --snpd:   [hidden email]: -> 8 -> ifIndex = 8
> --snpd:   [hidden email]: -> 9 -> ifIndex = 9
> --base: Walking ifType
> --snpd:   [hidden email]: -> 1 -> ifType = 24
> --snpd:   [hidden email]: -> 2 -> ifType = 6
> --snpd:   [hidden email]: -> 3 -> ifType = 6
> --snpd:   [hidden email]: -> 4 -> ifType = 6
> --snpd:   [hidden email]: -> 5 -> ifType = 131
> --snpd:   [hidden email]: -> 6 -> ifType = 6
> --snpd:   [hidden email]: -> 7 -> ifType = 6
> --snpd:   [hidden email]: -> 8 -> ifType = 6
> --snpd:   [hidden email]: -> 9 -> ifType = 6
> --base: Walking ifAdminStatus
> --snpd:   [hidden email]: -> 1 -> ifAdminStatus = 1
> --snpd:   [hidden email]: -> 2 -> ifAdminStatus = 1
> --snpd:   [hidden email]: -> 3 -> ifAdminStatus = 1
> --snpd:   [hidden email]: -> 4 -> ifAdminStatus = 1
> --snpd:   [hidden email]: -> 5 -> ifAdminStatus = 2
> --snpd:   [hidden email]: -> 6 -> ifAdminStatus = 1
> --snpd:   [hidden email]: -> 7 -> ifAdminStatus = 2
> --snpd:   [hidden email]: -> 8 -> ifAdminStatus = 1
> --snpd:   [hidden email]: -> 9 -> ifAdminStatus = 1
> --base: Walking ifOperStatus
> --snpd:   [hidden email]: -> 1 -> ifOperStatus = 1
> --snpd:   [hidden email]: -> 2 -> ifOperStatus = 1
> --snpd:   [hidden email]: -> 3 -> ifOperStatus = 1
> --snpd:   [hidden email]: -> 4 -> ifOperStatus = 1
> --snpd:   [hidden email]: -> 5 -> ifOperStatus = 2
> --snpd:   [hidden email]: -> 6 -> ifOperStatus = 2
> --snpd:   [hidden email]: -> 7 -> ifOperStatus = 2
> --snpd:   [hidden email]: -> 8 -> ifOperStatus = 1
> --snpd:   [hidden email]: -> 9 -> ifOperStatus = 1
> --base: Walking ifMtu
> --snpd:   [hidden email]: -> 1 -> ifMtu = 65536
> --snpd:   [hidden email]: -> 2 -> ifMtu = 1500
> --snpd:   [hidden email]: -> 3 -> ifMtu = 1500
> --snpd:   [hidden email]: -> 4 -> ifMtu = 1500
> --snpd:   [hidden email]: -> 5 -> ifMtu = 1332
> --snpd:   [hidden email]: -> 6 -> ifMtu = 1500
> --snpd:   [hidden email]: -> 7 -> ifMtu = 1500
> --snpd:   [hidden email]: -> 8 -> ifMtu = 1500
> --snpd:   [hidden email]: -> 9 -> ifMtu = 1500
> --base: Walking ifSpeed
> --snpd:   [hidden email]: -> 1 -> ifSpeed = 10000000
> --snpd:   [hidden email]: -> 2 -> ifSpeed = 1000000000
> --snpd:   [hidden email]: -> 3 -> ifSpeed = 1000000000
> --snpd:   [hidden email]: -> 4 -> ifSpeed = 0
> --snpd:   [hidden email]: -> 5 -> ifSpeed = 0
> --snpd:   [hidden email]: -> 6 -> ifSpeed = 0
> --snpd:   [hidden email]: -> 7 -> ifSpeed = 10000000
> --snpd:   [hidden email]: -> 8 -> ifSpeed = 10000000
> --snpd:   [hidden email]: -> 9 -> ifSpeed = 10000000

I haven't edited the message so others can take a shot.

We still use MRTG as a part of Nagios and Cacti in our monitoring
systems but I haven't done any manual configs in a very long time. One
common thing to keep in mind is that although NICs are generally
specified in bits-per-second, SNMP (and consequently mrtg) use bytes-
per-second. One gigabit IS 125,000,000 bytes (1,000,000,000 / 8 =
125,000,000).

The MaxBytes option simply tells mrtg that values above this are to be
ignored (ditto with AbsBytes). The primary idea is for mrtg to ignore
nonsensical data which sometimes happens.

I don't know if cfgmaker permits you to specify the "Thresh[Min|Max]*"
options. That may still be a "manual, go hack the config yourself" step
as it was back in the day (and a common reason people use Cacti (it
allows you to set thresholds relatively easily through its GUI).
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Re: Using mrtg to monitor cable modem utilization

Alex Regan
Hi,

On Wed, Jun 7, 2017 at 10:11 AM, Rick Stevens <[hidden email]> wrote:

> I haven't edited the message so others can take a shot.
>
> We still use MRTG as a part of Nagios and Cacti in our monitoring
> systems but I haven't done any manual configs in a very long time. One
> common thing to keep in mind is that although NICs are generally
> specified in bits-per-second, SNMP (and consequently mrtg) use bytes-
> per-second. One gigabit IS 125,000,000 bytes (1,000,000,000 / 8 =
> 125,000,000).
>
> The MaxBytes option simply tells mrtg that values above this are to be
> ignored (ditto with AbsBytes). The primary idea is for mrtg to ignore
> nonsensical data which sometimes happens.
>
> I don't know if cfgmaker permits you to specify the "Thresh[Min|Max]*"
> options. That may still be a "manual, go hack the config yourself" step
> as it was back in the day (and a common reason people use Cacti (it
> allows you to set thresholds relatively easily through its GUI).

Thanks very much for the info. It's also been like a decade since I've
had to configure mrtg. Most of my concern comes from the large
disparity between the download (35mbit) and the upload (5mbit), and
the upload getting lost on the graph.

Ideas for other utilization graphing programs would be appreciated.
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