Support for Eltex MES Managed Switches.

[k0ste]

Added support for Eltex MES devices.
Tested on Access & Aggregation MES devices that I have.
eltexSensorDescription is empty string. Later I will report to the manufacturer about this issue.

MES3124:

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.129.1 --mode hardware-health
OK - environmental hardware working fine | 'sensor__temp'=29°C;55;65;; 'sensor__temp'=33°C;55;65;; 'sensor__temp'=36°C;55;65;;

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.129.1 --mode hardware-health -v
I am a MES3124 28-port 1G/10G Managed Switch
OK - environmental hardware working fine
fan1_unit1 is normal
fan2_unit1 is normal
fan3_unit1 is normal
fan4_unit1 is normal
sensor  is 29°C
sensor  is 33°C
sensor  is 36°C
ps1_unit1 is normal
ps2_unit1 is normal | 'sensor__temp'=29°C;55;65;; 'sensor__temp'=33°C;55;65;; 'sensor__temp'=36°C;55;65;;

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.129.1 --mode cpu-load -v
I am a MES3124 28-port 1G/10G Managed Switch
OK - cpu usage is 22%
cpu usage is 22% | 'cpu_usage'=22%;50;90;0;100 'cpu_usage_one_minute'=5%;50;90;0;100 'cpu_usage_five_minutes'=3%;50;90;0;100

MES5324:

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.129.59 --mode hardware-health
OK - environmental hardware working fine | 'sensor__temp'=38°C;55;65;; 'sensor__temp'=34°C;55;65;; 'sensor__temp'=29°C;55;65;; 'sensor__temp'=35°C;55;65;;

I am a MES5324 28-port 10G/40G Managed Switch
OK - environmental hardware working fine
fan1_unit1 is normal
fan2_unit1 is normal
fan3_unit1 is normal
fan4_unit1 is normal
sensor  is 38°C
sensor  is 34°C
sensor  is 29°C
sensor  is 35°C
ps1_unit1 is normal
ps2_unit1 is normal | 'sensor__temp'=38°C;55;65;; 'sensor__temp'=34°C;55;65;; 'sensor__temp'=29°C;55;65;; 'sensor__temp'=35°C;55;65;;

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.129.59 --mode cpu-load -v
I am a MES5324 28-port 10G/40G Managed Switch
OK - cpu usage is 5%
cpu usage is 5% | 'cpu_usage'=5%;50;90;0;100 'cpu_usage_one_minute'=5%;50;90;0;100 'cpu_usage_five_minutes'=5%;50;90;0;100

MES2124P (have only 2 fans on chassis and only one PSU):

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.129.6 --mode hardware-health
OK - environmental hardware working fine | 'sensor__temp'=32°C;55;65;;

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.129.6 --mode hardware-health -v
I am a MES2124P rev.C 28-port 1G Managed Switch with 24 POE+ ports
OK - environmental hardware working fine
fan1_unit1 is normal
fan2_unit1 is normal
fan3_unit1 is unknown
fan4_unit1 is unknown
fan5_unit1 is unknown
sensor  is 32°C | 'sensor__temp'=32°C;55;65;;

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.129.6 --mode cpu-load -v
I am a MES2124P rev.C 28-port 1G Managed Switch with 24 POE+ ports
OK - cpu usage is 5%
cpu usage is 5% | 'cpu_usage'=5%;50;90;0;100 'cpu_usage_one_minute'=5%;50;90;0;100 'cpu_usage_five_minutes'=5%;50;90;0;100

MES2324 (fanless with one PSU):

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.2.1 --mode hardware-health
OK - environmental hardware working fine | 'sensor__temp'=31°C;55;65;;

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.2.1 --mode hardware-health -v
I am a MES2324 28-port 1G/10G Managed Switch
OK - environmental hardware working fine
fan1_unit1 is unknown
fan2_unit1 is unknown
fan3_unit1 is unknown
fan4_unit1 is unknown
sensor  is 31°C | 'sensor__temp'=31°C;55;65;;

[k0ste@WorkStation check_nwc_health]$ ./plugins-scripts/check_nwc_health --hostname 10.100.2.1 --mode cpu-load -v
I am a MES2324 28-port 1G/10G Managed Switch
OK - cpu usage is 4%
cpu usage is 4% | 'cpu_usage'=4%;50;90;0;100 'cpu_usage_one_minute'=5%;50;90;0;100 'cpu_usage_five_minutes'=4%;50;90;0;100