Network Fundamentals

[mautez_mah]

if I have many routers, and there is a router in the middle impact a performance by dropping packet , 
ok how can I determine which one If I don't have monitoring tools ,
If I did traceroute is it enough , can I do any other thing to check ,

[Joseph W. Doherty]

Assuming you have access to those routers, you might connect to each an check its CPU and interface stats.  Basically all a monitoring tool do is collect the same information.

[mautez_mah]

@Joseph W. DohertyThanks but if we have 50 routers should I access each one speartly, it is difficult right. 
I am looking for any Network tools. the command will help me with that 

[Joseph W. Doherty]

Ah, I misunderstood - though you were asking what to do if you have no tools, and weren't planning to obtain any.

There are "free" monitoring tools.  For recommendations, post a new question asking for such recommendations.

[mautez_mah]

@Joseph W. Doherty  no you are right, I meant network tools like ping , trace , telnet  ...etc soory it is my bad I should clear my qusetion , 

so no monitoring tools , is there any command or way to check where is issue without accessing routers 

[Georg Pauwen · Accepted solution]

Hello,

from a Windows machine, you could use 'pathping', that will give you an indication of where the bottleneck might be. Below is an example:

C:\Users\gpauwen>pathping 8.8.8.8

Tracing route to dns.google [8.8.8.8]
over a maximum of 30 hops:
0 MSI.dynamic.ziggo.nl [192.168.178.19]
1 192.168.178.1
2 10.255.9.1
3 ht-rc0001-cr102-et69-251.core.as33915.net [213.51.203.141]
4 asd-tr0021-cr101-be152-10.core.as9143.net [213.51.158.12]
5 nl-ams14a-ri1-ae51-0.core.as9143.net [213.51.64.186]
6 10ge-1-4.cr1.ams2.baseip.com [213.46.182.22]
7 142.251.70.127
8 142.251.48.175
9 dns.google [8.8.8.8]




Computing statistics for 225 seconds...


Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
0 MSI.dynamic.ziggo.nl [192.168.178.19]
0/ 100 = 0% |
1 1ms 0/ 100 = 0% 0/ 100 = 0% 192.168.178.1
0/ 100 = 0% |
2 --- 100/ 100 =100% 100/ 100 =100% 10.255.9.1
0/ 100 = 0% |
3 7ms 0/ 100 = 0% 0/ 100 = 0% ht-rc0001-cr102-et69-251.core.as33915.net [213.51.203.141]
0/ 100 = 0% |
4 12ms 0/ 100 = 0% 0/ 100 = 0% asd-tr0021-cr101-be152-10.core.as9143.net [213.51.158.12]
0/ 100 = 0% |
5 14ms 0/ 100 = 0% 0/ 100 = 0% nl-ams14a-ri1-ae51-0.core.as9143.net [213.51.64.186]
0/ 100 = 0% |
6 --- 100/ 100 =100% 100/ 100 =100% 10ge-1-4.cr1.ams2.baseip.com [213.46.182.22]
0/ 100 = 0% |
7 --- 100/ 100 =100% 100/ 100 =100% 142.251.70.127
0/ 100 = 0% |
8 12ms 0/ 100 = 0% 0/ 100 = 0% 142.251.48.175
0/ 100 = 0% |
9 12ms 0/ 100 = 0% 0/ 100 = 0% dns.google [8.8.8.8]

Trace complete.