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Common commands for Cisco switches -- set the switch Password
A. Change the remote TELNNET Password
Switch#configureterminal
Switch(config)#linevty04
Switch(config-line)#passwordqycx123
Switch(config-line)#l
Layer-3 Switch for Cisco switches
Although single-arm routing solves the communication problem between different VLANs, it also has its fatal defects:
-The single arm itself is the Backbone link of the network, which is easy to form a network bottleneck.
-The sub-interface relies on physical interfaces, and the application is not flexible
-You need to view the route table for each
How to communicate with different vlan segments of a layer-3 switch can be achieved through the layer-3 function of the layer-3 Switch, that is, route forwarding. For example, PC1 (192.168.255.2/24) is connected to GE0/0/1 PC2 (192.168.254.2/24) connect to GE0/0/2 int GE0/0/1 belongs to vlan 2 int GE0/0/2 belongs to
When I got up this morning to go to the forum, I saw a post. Ask how to solve the following problem?
A Cisco three-tier switch divides 3 VLANsVLAN 2:IP 192.168.1.1 255.255.255.0 192.168.1.254 Network SegmentVLAN 3:IP 192.168.2.1 255.255.255.0 192.168.2.254VLAN 4 IP 192.168.3.1 255.255.255.0 192.168.3.254Each VLAN can communicate with each other.Now add 1
Route
Use sub-interfaces
Configure fa0/0 with no IP address and activate
Interface fastethernet0/0
No IP Address
No shut
Configure sub-interface 1Fa0/0.1
Interface fastethernet0/0.1
Encapsulation dot1q 2 (vlan2)
IP address 10.10.10.1 255.255.255.0
No shut
ConfigurationSub-interface 2Fa0/0.2
Interface fastethernet0/0.2
Encapsulation dot1q 3(Vlan3)
IP address 255.255.20.1 255.255.255.0
No shut
SW Configuration:
Create vlan2 and vlan3
First of all, the Cisco, the orders are not many, are basic. Not including STP, upgrades, Acl,web and the like.Ruijie and Cisco 99% are similar.CISCO layer-2Switch>go to HyperTerminal console switch>Enable access switch privileged mode switch#configure terminal Enter
Lab Environment:650) this.width=650; "alt=" Cisco Packet Tracer three-layer switch interrupt Dhcp-ibm.chick-mingkang.zhou "src=" http://img0.ph.126.net/4fx 93s0ahtpaead19pxmyg==/6619563575538146055.jpg "style=" border:0px;height:auto;margin:0px 10px 0px 0px; "/>Experimental Purpose:1, the VLAN is divided on the three layer switching: vlan10\vlan100\vlan200, and t
Cisco 3550 switch stp learning notes STP (Spanning Tree Protocol) (IEEE 802.1D) Spanning Tree Protocol-review the working principles of SW: 1. the frame it forwards cannot be modified. create a MAC-PORT ing table based on source MAC learning. forward the frames in the target MAC ing table directly from the corresponding port. for frames without target MAC ing/Tar
Add acces to the VLAN:Sysint G0/0/1Port Link-type ACCPort default VLAN 2To add a trunk type to a VLAN:Sysint G0/0/1Port Link-type TrunkPort Trunk Allow-pass VLAN 2To create a single VLAN:SysVLAN 2Description XXXBatch Create VLAN:SysVLAN Batch 2 to 10Configure the traffic statistics feature for VLANs:VLAN 2Statistic ena
#config terminal
Route (config) # line vty 0 4 ---- enter telnet remote login port mode (0 4 allows 5 Users)
Route (config-line) # password CISCO ---- set the password to "CISCO" (to encrypt the password, enable vro password protection before: service pass-encryption)
Route (config-line) # login ---- encrypted upon login
Route(config-line)#exit
Continue to enter the privileged mode and wh
Overview of LAN switches
LAN switches have evolved from a HUB-based LAN shared in the traditional sense to a broader space. Take Cisco's Catalyst 5000 Series LAN switch as an example. It includes an integrated switching hardware structure, 10-Mbps Ethernet that supports switching, and-Mbps Fast Ethernet, supports fast Ethernet, FDDI, exchange-type ring, and layer-3 switching processing. This type of switch
switch to automatically learn to bind, this configuration is saved in the MAC address and in the running configuration file. If you save the configuration, you do not have to re-learn the MAC address after the switch restarts, although the sticky and reliable MAC address can be manually configured, CISCO does not recommend this. The command is as follows:
current configurations# copy running-config Startup-config saves the current configuration in RAM into the NVRAMS> show interface [Type slot_#/port_#] View information for all or specified interfacesS> show IP Display IP configuration of the switch (available on 1900 series only)S> Show version View device informations# show ip interface brief verify IP configurationS (config-if) # speed 10|100|auto set interface rateS (config-if) # Duplex Auto|full|
MAC address on the switch.
In the middle of a Cisco switching network, how do I find out which port of the switch is connected to the IP address of a machine? The most convenient and quick way is to use the User tracking function of the CiscoWorks 2000 LMS network management software. The graphical interface is clear at a glance. If you do not have this software
switches in the network receive all the BPDUs and compare them, you can choose the only one root bridgeConvergence of STP5 STP states for switch portsStatus useForwarding (Forwarding) sending/receiving user dataLearning (learning) Building Bridge tablesListen (Listening) build an ' active ' topologyBlocking (Blocking) receives only BPDUsDisable (Disabled) Force shutdown3 Types of Timers for STPHello time: The time interval between network Bridge send
Cisco switch security common traffic control and anti-DDoS problems. Recently, cisco switch security has been favored by many friends. Let's have a deep understanding of cisco switch security solutions today! Traffic control, anti
In the middle of a Cisco switching network, how do I find out which port of the switch is connected to the IP address of a machine? The most convenient and quick way is to use the User tracking function of the CiscoWorks 2000 LMS network management software. The graphical interface is clear at a glance.
If you do not have this software, you can use the following manual analysis method to find the answer:
Ex
This tutorial describes how to start and configure Cisco Catalyst 1900 series switches.1. Tutorial PurposeThrough this experiment, you can master the following skills:Familiar with switch startup interface;Configure the vswitch;Understand the port number of the vswitch.2. device requirementsThis experiment requires the following devices:One Cisco Catalyst 1900 Se
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