An engineer who has worked in the network industry for 10 years says that the first important thing in network construction is the demand, the second is the demand, and the third is the demand. It can be said that the user needs directly determine the purchase of equipment. After making the user needs, from a plane angle to make reasonable equipment purchase.
So how do we choose the two-tier switch we need?
1. Back Plate Bandwidth
Backplane bandwid
Test topologyEnvironment: DHCP server and DHCP clients belong to the same VLAN, but clients belong to different switches, and the L2 and L3 switches turn on DHCP snooping to concludeconfiguration of the L3 switch172.28.27.0 255.255.255.0172.28.27.254 172.28.28.15 ! ! 27IP DHCP snooping information option allow-untrusted //must add this command because the L3 switch also has DHCP snooping turned on, as explained belowIP DHCP snoopin
The configuration of a vswitch has always been mysterious, not only for general users, but also for the vast majority of network administrators. It is also an important and basic indicator for measuring the level of network management. This is mainly due to two reasons: first, the switches configured by the vast majority of enterprises are non-Network-connected vswitches on the desktop, and do not require any configuration at all. They are purely "Dummies". Like hubs, they are connected to the p
The Switch...case statement in Swift can determine the object type, and the objective-c must be an integer.Can not penetrate, can not write break,
var rank = "A"
switch rank{case
"a"://equivalent to if
print ("excellent") Case
"B"://equivalent to else if
print ("excellent")
case "C"://equivalent to else if
print ("excellent")
default://equivalent to else
print ("no rating")
}
The IDC report shows that the switch market has maintained a high growth momentum in recent years, and the market is expected to reach $1.51 billion by 2009. Switch in the enterprise network occupies an important position, is usually the core of the entire network, this position makes it become the focus of hacker intrusion and virus rampant, in order to protect their own network security, enterprises need
The IDC report shows that the switch market has maintained a high growth momentum in recent years, and the market is expected to reach $1.51 billion by 2009. Switch in the enterprise network occupies an important position, is usually the core of the entire network, this position makes it become the focus of hacker intrusion and virus rampant, in order to protect their own network security, enterprises need
There are many things worth learning about the switch system. Here we mainly introduce how to reasonably configure the switch so that the switch system can control the network at will. With the rapid development of information technology, many organizations have established their own internal networks to cater to the information development trend, in the daily of
The first thing you need to do is to switch between the applications that are currently in use, and to turn on the "when I swipe from the left to the middle, switch directly to the recently used Apps" feature.
Apply Toggle Settings
First, use the mouse to switch directly
In the WIN8 system, when you need to sw
In the switched Ethernet environment, the communication between the two workstations is not heard by the third party. In some cases, we may need to do such listening, such as protocol analysis, traffic analysis, intrusion detection. For this we can set the span (switchedportanalyzer Switch Port Analyzer) feature of the Cisco switch, or the early "port mirroring", "Monitoring port" feature. The object that
With the gradual deepening of network application, the Telecom class switch, especially the three-layer switch, has become the focus of the market contention. However, in different functions, a wide range of switch equipment, users how to remove the fog, to find their own application characteristics of the product? This not only requires users to start from the t
At present, the market support Gigabit Ethernet Technology Gigabit Switch products are numerous, manufacturers are also more, how to choose the right equipment in these varieties of equipment, is a need to carefully consider, time-consuming to understand and difficult to weigh the choice of the problem.
Therefore, generally in our evaluation of equipment selection, we should pay attention to the following aspects: Product type, the product support gi
Switching between the pure view
Single document multi-view switching is one of the most difficult problems I have encountered in learning MFC. I feel that the view switch is divided into three levels, the first is to switch the view class in the case of the non-segmented panes, the second is to switch the experiment view in one pane of the pane, and the third
In a Cisco switch, how does one configure QOS speed limit? How to restrict BT download? This blog will use detailed examples for your explanation.
Instance 1: QOS speed limit problem on CISCO switches
It is used to control the bandwidth of a leased line user on a vswitch. The vswitch is usually at 10/100/1000 or three rates. QOS is required for other rates. You can also limit some ports, policy to restrict some ports.
I. Network Description
User‑pc1 i
Switch) performance directly affects the entire network. Therefore, it is not only necessary to understand the Switch parameters, but also helps you make better choices that meet your actual needs. Currently, the price of ATM switches remains high and is mainly used in backbone networks or wide area networks of large networks. Therefore, we will focus on Parameter Analysis of Ethernet switches.Selection of
Previous page Everyone talked about Cisco Basic Operation command switch, while dragon boat holiday, the Cisco simple switch configuration, and hope you share "Happy Dragon Boat Festival"! Ok, configure the switch, first, you must enter the global configuration mode switch, successfully connect the
The is only so called "advanced" usage because I have not mastered the most basic usage of the switch, so, the following is actually the basic usage of it! The Switch statement is similar to a series of IF statements that have the same expression. There are many situations where you need to compare the same variable (or expression) with a number of different values and execute different code based on wh
Recently saw a lot of people asking about the switch, hub, router is what, function, what is the difference, the author on these questions to do some simple answers.
First of all said Hub, that is, hubs. Its role can be simply understood to connect some machines to form a local area network. A switch (also known as a switched hub) works roughly the same as a hub. But there is a difference in performance: t
the trunk port is that the hybrid port can allow multiple VLAN messages to be sent without tagging, while the trunk port allows only the default VLAN messages to be sent without tagging.Table 1-9 Setting the link type of the Ethernet portOperationCommandSet Port to access portSwitch (config) #interface range g0/21-22Switch (config) #switchport mode accessSet Port to hybrid portSwitch (config) #interface range g0/21-22Switch (config) #switchport mode hybridSet Port to trunk portSwitch (config) #
Basic knowledge of VLAN division experiment: VLAN is short for Virtual Local Area Network (VLAN), which is a logical Network divided on a physical Network. This network corresponds to the L2 network of the ISO model. VLAN division is not limited by the actual physical location of the network port. A VLAN has the same attributes as a common physical network, except that it has no physical location restrictions. It is the same as a common LAN. Layer-2 unicast, broadcast, and multicast frames are f
The port of the core switch is mainly a fiber type, but the price of the switch fibre port is very expensive and requires special attention from the user, while the fibre port of the switch is not stacked and can only be used for cascading purposes.
Cascading can use either a normal port or a special mdi-ii port. A pass-through cable should be used when the two
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