All language subtitles for Free-CCNA-Syslog-Day-41-CCNA-200-301-Complete-Course_en

Welcome to Jeremy’s IT Lab. This is a free,\n

these videos, please subscribe to follow along\n

a comment, and share the video to help spread\n

In this video we will cover Syslog. Syslog\n

events that happen on the device, for example\n

relationships going up or down, etc. The log\n

CLI of the device to inform you of important\n

stored in the device or on an external server\n

so understanding Syslog is essential for network\n

in exam topic 4.5, which says you must be\n

including facilities and levels. In this video\n

Here’s what we’ll cover in this video.\n

and outline how it works. Then I’ll introduce\n

have a standard format, and it’s important\n

understand Syslog messages. Then I’ll introduce\n

levels. You probably aren’t sure exactly\n

yet, but they were both mentioned in the exam\n

video. Then I’ll introduce some basic Syslog\n

isn’t mentioned in the exam topics, but\n

practice. So, I’ll go over the basic Syslog\n

until the end of the video for a bonus practice\n

CCNA, the best practice exams for the CCNA.

Here’s a quick overview of Syslog. Syslog\n

logging. On network devices, Syslog can be\n

status, changes in OSPF neighbor status, or\n

like EIGRP and BGP, also system restarts,\n

so I’m not going to try to list them all.\n

you configure the device, saved in the device’s\n

I’m sure you’ve seen these messages as\n

example, I used NO SHUTDOWN to enable a router\n

are displayed, indicating that the interface\n

when troubleshooting issues, examining the\n

both used for monitoring and troubleshooting\n

but their functionalities are quite different.\n

give a brief summary of how Syslog and SNMP\n

Now let’s take a look at the Syslog message\n

to see in a standard Syslog message. Let’s\n

number indicating the order, the sequence,\n

indicating at what time the message was generated.\n

especially when comparing the logs of different\n

time thanks to NTP, you can use these timestamps\n

on different devices. Note that these two\n

on the device’s configuration. Sequence\n

are very important and I highly recommend\n

is the facility, this is a value that indicates\n

message. For example, if OSPF generated the\n

would be displayed in this field. Next is\n

of the event. Some messages are just informational,\n

Other messages indicate something much more\n

There are 8 severity levels, and you’ll\n

is a mnemonic, which is a short code for the\n

example, if the facility is OSPF, this mnemonic\n

is about OSPF neighbor adjacencies. If the\n

that the message is about an interface going\n

This is the detailed information about the\n

Before looking at some examples of Syslog\n

severity levels. As I briefly mentioned, these\n

event is. For example, something like a serious\n

neighbor moving to the FULL state. There are\n

severity level has a number, 0 being the most\n

level also has a keyword, which is a name\n

description. I took these descriptions directly\n

is level 0, emergency, events which render\n

events for which action must be taken immediately.\n

2 is called critical, and the description\n

for level 3, error, and level 4, warning.\n

representing a ‘normal but significant condition’.\n

for level 5 is ‘Notice’, but in the CLI\n

make sure you know of both names. Notice and\n

and then finally the least severe level, level\n

messages. Now, the RFC doesn’t give detailed\n

into each severity level. So, each vendor\n

a quote from the RFC. Because severities are\n

that means a Syslog server) should not assume\n

of severity. That’s from RFC 5424, The Syslog\n

you Google it. Basically it means that you\n

level to be exactly the same as a Juniper\n

Each vendor may interpret each level differently.\n

the levels and keywords. You should know that\n

6, for example. If you want some help remembering\n

Engineer Will Need Ice cream Daily. Just like\n

ways to remember these levels post them in\nthe comment section!

Let’s look at some examples of Syslog messages.\n

indicating the month, date, hours, minutes,\n

is no sequence number before the timestamp.\n

and timestamp fields may or may not be displayed,\n

Here’s the facility, LINK. And the severity\n

us the message is about an interface going\n

which tells us exactly what happened. Interface\n

that’s an example Syslog message. Make sure\n

message. For example, you might be asked,\n

You should be able to answer ‘LINK’. Or\n

able to answer ‘3’ or ‘error’, depending\n

judging by the exam topics list those seem\n

the exam. Okay, let’s see some more examples.\n

moving to the FULL state. The facility is\n

level, message. The mnemonic is A D J C H\n

and for this one I turned on the sequence\n

In this case the facility is SYS for system,\n

keywords for level 5, ‘notice’ or ‘notification’.\n

of ‘configured from console by jeremy on\n

you exit global config mode and return to\n

this time I just changed the timezone from\n

Again, the facility is SYS, but this time\n

level 6? It’s ‘informational’. And the\n

sure you can identify each part of a Syslog\n

Soon we’ll take a look at how to configure\n

an overview of the different locations Syslog\n

line. This means that Syslog messages will\n

via the console port. By default, all messages,\n

when connected to the CLI via the device’s\n

when you click on a device and go to the CLI\n

via the console port of the device. So, that’s\n

devices in packet tracer via the CLI tab.\n

This means that Syslog messages will be displayed\n

Telnet or SSH. Telnet and SSH will be covered\n

to connect to a device over a network, without\n

console port. Logging to the VTY lines is\n

not be displayed if you’re connecting to\n

an interface, for example, no message will\n

messages is the ‘buffer’ of the device.\n

to RAM. By default, all messages, from level\n

You can view the messages in the buffer with\n

at that command in the lab video. You can\n

to an external server. This is very useful,\n

small networks. Having a central server for\n

easier and makes it easier to compare the\n

servers will listen for Syslog messages on\n

message to a Syslog server, the destination\n

So here are some basic Syslog configurations.\n

the console line. This is enabled by default,\n

is LOGGING CONSOLE, followed by the level.\n

commands, you can specify either the number\n

I specified 6, but I could have used the keyword\n

doesn’t only enable informational messages.\n

and higher, so informational to emergency,\n

0. By default the console logs all messages,\n

level to 6 actually slightly restricts the\n

Okay, next the command to configure logging\n

by the level. Just like above, you can specify\n

the keyword of INFORMATIONAL instead of the\n

buffer the command is LOGGING BUFFERED, followed\n

level. The size is optional, if you don’t\n

size. Just be careful not to set the buffer\n

memory away from other essential operations.\n

you can use either the number or the keyword,\n

6 but also levels 5, 4, 3, 2, 1, and 0. Finally,\n

with LOGGING, followed by the server IP, or\n

commands are the same, you can use whichever.\n

to the external server, you need to use a\n

by the level. This time I specified DEBUGGING,\n

number of 7 instead. This enables logging\n

3, 2, 1, and 0. So, that’s how you enable\n

specify which levels of messages should be\n

specified in the exam topics, you probably\n

the exam. However, I will include flashcards\n

with them in the following lab video.

Let me introduce another command. Even if\n

messages will not be displayed when connected\n

too. For the messages to be displayed, you\n

from privileged exec mode. But not only that,\n

to the device via Telnet or SSH. So, if you\n

command, Syslog messages will be displayed\n

you log out, that ‘session’ is finished\n

effective. To display Syslog messages in the\n

need to use the TERMINAL MONITOR command again.\n

This next command isn’t essential, but very\n

in the CLI while you are in the middle of\n

like this. Notice in the middle of typing\n

I continued typing the command, and the command\n

the color of the command to make it easier\n

the CLI it can be hard to see where the Syslog\n

To prevent this, you should use the logging\n

and I will talk more about ‘line’ configuration\n

to learn this yet, but for example here’s\n

0, and then configure LOGGING SYNCHRONOUS.\n

your typing is interrupted by a message. Here’s\n

was displayed, and then SHOW IP INT was reprinted\n

typing the command. So, this is a nice command\n

labs. It just makes things easier to see.

Okay, the last two commands I want to show\n

This is how you control whether or not the\n

in Syslog messages. To enable timestamps for\n

followed either by DATETIME or UPTIME. If\n

the actual date and time when the event occurred.\n

display the date and time, they will display\n

the event occurred. DATETIME is usually the\n

Then I enabled sequence numbers with the SERVICE\n

config mode, you can see that the Syslog message\n

I think it’s a good idea to always enable\n

find sequence numbers particularly useful,\n

Here’s a summary of the commands I just\n

lab will be very helpful, not just for remembering\n

works. So make sure to watch the next video\n

Finally, here’s a brief comparison of Syslog\n

are both used for monitoring and troubleshooting\n

functionalities are different. Syslog is used\n

the system are categorized based on facility\n

and likely to an external Syslog server. Syslog\n

troubleshooting. Here’s a big difference.\n

server, but the server can’t actively pull\n

Get message, or modify variables on the devices,\n

used to retrieve and organize information\n

IP addresses, current interface status, device\n

variables and organized within the MIB. SNMP\n

Set to modify variables on the clients. Syslog\n

device management, and you need to be familiar\n

Before the quiz, here’s a review of what\n

of Syslog. It’s an industry standard protocol\n

I introduced the Syslog message format, as\n

sure you know all of those severity level\n

the different parts of a Syslog message. Finally,\n

You probably won’t be asked about Syslog\n

hands-on practice in Packet Tracer will be\n

end of the quiz for a bonus practice question\n

exams for the CCNA, and the ones I used to\n

What is the severity level of the following\n

the video now to examine the message and select\n

The answer is C, Notification. This is indicated\n

mnemonic. This severity level is called ‘Notice’\n

as ‘Notification’. In the CLI of Cisco\n

Here’s another one. What is the severity\n

are the options. Pause the video now to examine\n

The answer is B, Error. That is the name of\n

the severity levels and their names. They’re\n

definitely important. Okay, let’s go to\nquestion 3.

Which of the following locations are Syslog\n

Syslog configuration? (select two). Here are\n

about the answers, select two.

The answers are B, the console line and C,\n

messages in realtime when connected to the\n

can also use SHOW LOGGING to view those messages\n

of the device. The device will not send Syslog\n

it to do so, and Syslog messages also won’t\n

the device via the VTY lines using Telnet\n

in another video, don’t worry about them\n

You issue the logging buffered 6 command on\n

will be saved to the logging buffer? Here\n

The answer is C, severity 0 to 6. When you\n

of that level and higher severity, meaning\n

are more severe, will be displayed or saved\n

Which of the following Syslog message fields\n

configuration? (select two). Here are the\n

The answers are A, sequence and D, time stamp.\n

and SERVICE SEQUENCE-NUMBERS command. I highly\n

although I don’t think sequence numbers\n

quiz. Now let’s take a look at a bonus question\n

Okay here's today's Boson ExSim practice question.\n

so I'll click on this button to open it up.\n

logging keywords from the left and drag them\n

right. Okay, so I have said this multiple\n

know all of these levels for the CCNA exam.\n

Okay let's check. So, first level 0. This\n

but the severity level is the highest. And\n

number 1, alerts. And the critical, number\n

that, notifications, or notices. And then\n

So, if it helps you remember that, use the\n

need ice cream daily'. So, I personally don't\n

do, so if that helps you remember these seven\n

so I'll click on done and then let's check.\n

as always Boson has a great explanation down\n

about filtering the levels on the console,\n

There is also a reference here to some Cisco\n

keywords. So, if you google this title here\n

is available for free online from Cisco, and\n

that was a question from Boson Software's\n

the best practice exams for the CCNA and I\n

Boson ExSim, please follow the link in the\nvideo description.

There are supplementary materials for this\n

the software ‘Anki’. There will also be\n

some hands-on practice. That will be in the\n

the link in the description, and I’ll send\n

Before finishing today’s video I want to\n

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