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Network performance - Server.

Introduction.

This section is focused on performing the review and validation of the server status in general, we will focus on verifying the historical behavior of the main metrics for the server, it is important to review all the metrics related to the good performance between the server and devices

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  • It is important to validate the localhost heath, including the overall reachability, availability, and Health you will be able to see data not following the historical data pattern that can give us a clue where the problem can be happening or even if the abnormal behavior has started before a change request In the early hours.

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  • Viewing the graphs referring to the network performance as (Response Time in milliseconds, IP Utilization, TCP Connection, TCP Segments) will help us to identify the behavior of the server/network in a period of 2 days, we can modify this period time to see more data if needed.

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Device configuration.

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  1. Ping test, The Ping tool is used to test whether a particular host is reachable across an IP network. A Ping measures the time it takes for packets to be sent from the local host to a destination computer and back. 

    Code Block
    ping x.x.x.x #add the ip address you need to reach


  2. Traceroute, is a network diagnostic tool used to track in real-time the pathway taken by a packet on an IP network from source to destination, reporting the IP addresses of all the routers it pinged in between

    Code Block
    traceroute <ip_Node>  #add the ip address you need to reach


  3. MTR, Mtr(my traceroute) is a command line network diagnostic tool that provides the functionality of both the ping and traceroute commands


    Code Block
    sudo mtr -r 8.8.8.8

    [sample results below]

    HOST: endor                       Loss%   Snt   Last   Avg  Best  Wrst StDev
     1. 69.28.84.2                    0.0%    10    0.4   0.4   0.3   0.6   0.1
     2. 38.104.37.141                 0.0%    10    1.2   1.4   1.0   3.2   0.7
     3. te0-3-1-1.rcr21.dfw02.atlas.  0.0%    10    0.8   0.9   0.8   1.0   0.1
     4. be2285.ccr21.dfw01.atlas.cog  0.0%    10    1.1   1.1   0.9   1.4   0.1
     5. be2432.ccr21.mci01.atlas.cog  0.0%    10   10.8  11.1  10.8  11.5   0.2
     6. be2156.ccr41.ord01.atlas.cog  0.0%    10   22.9  23.1  22.9  23.3   0.1
     7. be2765.ccr41.ord03.atlas.cog  0.0%    10   22.8  22.9  22.8  23.1   0.1
     8. 38.88.204.78                  0.0%    10   22.9  23.0  22.8  23.9   0.4
     9. 209.85.143.186                0.0%    10   22.7  23.7  22.7  31.7   2.8
    10. 72.14.238.89                  0.0%    10   23.0  23.9  22.9  32.0   2.9
    11. 216.239.47.103                0.0%    10   50.4  61.9  50.4  92.0  11.9
    12. 216.239.46.191                0.0%    10   32.7  32.7  32.7  32.8   0.1
    13. ???                          100.0    10    0.0   0.0   0.0   0.0   0.0
    14. google-public-dns-a.google.c  0.0%    10   32.7  32.7  32.7  32.8   0.0


  4. snmpwalk, is a Simple Network Management Protocol (SNMP) application present on the Security Management System (SMS) CLI that uses SNMP GETNEXT requests to query a network device for information. An object identifier (OID) may be given on the command line.


    Code Block
    The following example CLI command will return the IPS temperature information:

Command:snmpwalk -v 2c -c tinapc <IP address> 1.3.6.1.4.1.10734.3.5.2.5.5

Command Explanation:

In this case the CLI command breaks down as following;

snmpwalk                             = SNMP application
-v 2c                                     = specifies what SNMP version to use (1, 2c, 3)
-c tinapc                               = specifies the community string. Note: The IPS has the SNMP read-only community string of "tinapc"
<IP address>                       = specifies the IP address of the IPS device
1.3.6.1.4.1.10734.3.5.2.5.5 = OID parameter for the IPS temperature information

Results:

SNMPv2-SMI::enterprises.10734.3.5.2.5.5.1.0 = INTEGER: 27
SNMPv2-SMI::enterprises.10734.3.5.2.5.5.2.0 = INTEGER: 50
SNMPv2-SMI::enterprises.10734.3.5.2.5.5.3.0 = INTEGER: 55
SNMPv2-SMI::enterprises.10734.3.5.2.5.5.4.0 = INTEGER: 0
SNMPv2-SMI::enterprises.10734.3.5.2.5.5.5.0 = INTEGER: 85

Results Explanation:

SNMPv2-SMI::enterprises.10734.3.5.2.5.5.1.0 = INTEGER: 27 = The chassis temperature (27° Celsius / 80.6° Fahrenheit)
SNMPv2-SMI::enterprises.10734.3.5.2.5.5.2.0 = INTEGER: 50 = The major threshold value for chassis temperature (50° Celsius / 122° Fahrenheit)
SNMPv2-SMI::enterprises.10734.3.5.2.5.5.3.0 = INTEGER: 55 = The critical threshold value of chassis temperature (55° Celsius / 131° Fahrenheit)
SNMPv2-SMI::enterprises.10734.3.5.2.5.5.4.0 = INTEGER: 0   = The minimum value of the chassis temperature range ( 0° Celsius / 32° Fahrenheit)
SNMPv2-SMI::enterprises.10734.3.5.2.5.5.5.0 = INTEGER: 85 = The maximum value of the chassis temperature range (85° Celsius / 185° Fahrenheit)


    It is important to see that the device is pingable, do not have latency, packet loss and the SNMP data is been collected.

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