Passing Cisco CCNA And CCNP Examinations: Ping And Prolonged Ping
I frequently explain to CCNA and CCNP candidates that you do your very best Studying if you screw a thing up. I frequently obtain a amusing seem ideal soon after I state that, but the only real method to build your Cisco troubleshooting abilities – the skills you’ll should go your Intro, ICND, and CCNP tests – is by actually fixing configurations. Because your employer will have a dim view of you practising these expertise on their network, you far better accomplish that on your own home lab!
3 critical instruments for networking and CCNA/CCNP exam achievements are ping, extended ping, and traceroute. Right now we’re about to Examine the ping that we’re accustomed to utilizing for LAN problems, as well as the extended ping.
We’re all informed about “fundamental” ping, in which you use the ping command followed by the IP tackle you want to validate IP connectivity with. Once you’ve got connectivity, you will note 5 exclamation factors, as seen in this article:
R1#ping 172.twelve.123.two
Kind escape sequence to abort.
Sending five, a hundred-byte ICMP Echos to 172.twelve.123.two, timeout is two seconds:
!!!!!
Success charge is 100 percent (5/5), round-excursion min/avg/max = sixty eight/sixty eight/72 ms
The default supply IP tackle for ping will be the IP handle https://en.search.wordpress.com/?src=organic&q=먹튀검증 closest to the destination IP deal with. Other defaults – 5 ICMP packets are going to be despatched (that’s why the thing is five exclamation points), and so they’re sent two seconds aside.
That’s great For lots of basic scenarios, but while you progress 토토사이트 through your networking occupation and most Highly developed scenarios in your CCNA / CCNP studies, you'll want to transform A few of these defaults. What could you are doing should you needed to ship ten,000 pings? What if you essential your router’s loopback address to get the supply IP address for your pings? What if you planned to send them 5 seconds apart, rather than two?
That’s exactly where prolonged ping is available in. To work with prolonged ping, just kind “ping” and strike enter. (Observe that You can't use extended ping in person exec mode – you need to be in permit manner to do so.)
R1>ping
% Incomplete command.
“incomplete command” suggests which the router is expecting an IP handle; you are able to’t use prolonged ping in user exec manner.
R1>empower
R1#ping
Protocol [ip]:
Target IP deal with: 172.sixteen.123.1
Repeat depend [five]: 1000
Datagram size [a hundred]:
Timeout in seconds [2]:
Prolonged instructions [n]: y
Supply tackle or interface: loopback0
Form of company [0]:
Set DF little bit in IP header? [no]:
Validate reply knowledge? [no]:
Data pattern [0xABCD]:
Unfastened, Rigid, File, Timestamp, Verbose[none]:
Sweep choice of sizes [n]:
Sending 1000, 100-byte ICMP Echos to 172.16.123.1, timeout is 2 seconds:
Packet despatched that has a resource handle of one.one.1.one
…………………………………
In this example, I despatched 1000 ICMP packets to an tackle that doesn’t exist, so I am having durations instead of exclamation points. This illustration reveals you the many choices you have with prolonged ping.
Given that I’ve sent those a thousand pings, Allow’s mention that I would like to prevent that process. At the beginning of The essential ping output, the thing is this phrase: