cisco layer 2 traceroute

Manual implementation usually refers to the use of some hacker tools to scan and sniff the network, obtain the management account and related passwords, and install trojans on the network to further steal confidential files. The attack and deception process is relatively concealed and quiet, but it is extremely harmful to enterprises with high information security requirements. However, attacks from Trojans, viruses, and worms often deviate from the attack and cheat itself. Sometimes, they are v

: Human implementation, viruses, or worms. Manual implementation usually refers to the use of some hacker tools to scan and sniff the network, obtain the management account and related passwords, and install trojans on the network to further steal confidential files. Attacks and spoofing are often concealed and quiet, but they pose great harm to enterprises with high information security requirements. However, attacks from Trojans, viruses, and worms often deviate from the attack and cheat itsel

=192.168.1.1 ttl=64 id=27384 icmp_seq=0 rtt=36.8 mslen=46 ip=192.168.1.1 ttl=64 id=27385 icmp_seq=1 rtt=2. 4 ms---192.168.1.1 hping statistic---2 packets transmitted, 2 packets received, 0% packet Lossround-trip Min/avg/max = 2 .4/19.6/36.8 msLoops can be implemented with scripts or combined rows For addr in $ (SEQ

Configuration example of cisco router and layer-3 Switch environment, cisco layer-3 SwitchSimple environment configuration instance for cisco router layer-3 Switch I. network topology: Ii. configuration command: 1. vro Configura

configuration ip address of the virtual interface, as the vlan gateway for different vlan Note: The IP address of the two-tier switch configuration VLAN can only be used as a device management address, with only one. Experimental Equipment : switch_3560 1 units, switch_2960 1 units, PC 3, straight line, crossover line.Experimental topology :Experimental steps:New Cisco PT topology diagramOn the two-

Cisco CCNA Chapter 2 answers for the third semester, Cisco ccna for the third semester 1. Which command line interface (CLI) mode allows users to configure switch parameters such as host name and password? User Execution Mode Privileged Execution Mode Global Configuration Mode Interface Configuration M

servers and clients, you can query the ARP table to determine their MAC addresses. Then you can use the "traceroute mac address" command to locate the fault point.3. Prerequisites for L2 route TracingBecause the layer-2 route tracing is based on the MAC address, there are more prerequisites than the traceroute ip comm

three switching technology is the technology that combine routing technology with switching technology. After routing the first data stream, theIt will generate a map of the MAC address and IP address, and when the same data stream passes again, it will be directly from layer two through this tablerouting, which eliminates the network delay caused by router routing and improves the efficiency of packet forwarding.Routers: Routers work in the third

cannot connect the LAN to the WAN or the Internet, because the routing protocols supported by layer-3 switches are very limited. After all, this is not its main function. We know that on the LAN, a layer-2 switch identifies the packet sender through the source MAC address and forwards the packet according to the destination MAC address. Send data packets. For a

(All of the following is the hand of pure hand, there are flaws in the place, please also contain a lot of information to send piglets to exchange!) ）(All content and annotations in this article are displayed in the recursive architecture, because the format display does not understand the point of understanding!) ）(In this paper, the command keyword is mostly used shorthand, if there is an unknown, it is best to type the command when you use TAB completion!) ）

enterprises hope to deploy a high-intelligence, high-availability, and high-reliability storage network (SAN) on the basis of cost control ), or, if you want to extend your SAN infrastructure from an entry-level network to enterprise-level deployment, try to protect your SAN infrastructure investment. Cisco's upcoming CiscoMDS9100 series of multi-layer smart Optical Fiber switches will make customers' wishes a reality.

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 vlan forwarding, wasting

Layer-3 switches of Cisco devices practice communication between different VLANs. Layer-3 switches of Cisco devices practice communication between different VLANs. Cisco device layer-3 Switch implements communication between diffe

, although relatively simple, but compared with packet filtering, the function is more robust, in addition, with the Application Layer Agent firewall, its performance is higher, scalability is stronger. ASA can track source and destination addresses, Transmission Control Protocol (TCP) serial numbers, port numbers, and additional TCP flags for each packet. Access is allowed through the Cisco Secure PIX Fire

Branch switches.The Cisco switch can support any media as a trunk line. To achieve relay, you can use its unique isl tag. Isl (inter-switch link) is a protocol for transmitting vlan information and vlan data streams between switches, between switches and routers, and between switches and servers, by configuring isl encapsulation on the port directly connected to the vswitch, you can allocate and configure VLANs across the entire network.The core swit

Equipment: Cisco three layer OneTP AC200 1 UnitsTP AP 2 unitsObjective: To set up multiple SSID signals, each of which is independent of one network segment, and the terminal obtains IP automatically.Difficulties encountered: According to TP description AP Port is added to the specified VLAN, while the SSID binding in AC corresponds to vid, but the wireless termi

What is the second-layer forwarding mechanism? Learning thread and message forwarding thread.Layer 2 only depends on the MAC addressIP-independent So the IP-MAC binding on the second layer is invalid. The forwarding mechanism of a layer-3 Ethernet switch is divided into two parts:

CISCO PT Simulation Experiment (2) port configuration and management for switchesExperimental Purpose : Master the basic configuration and management of the switch, and understand the basic commands of the switch configuration.Experimental background : A company has a new batch of two-layer switch, before formally put into use to initialize the configuration and

-if) # channel-group 1 mode desirable Switch (config-if) # end Appendix: Switch (config-if) # channel-group port_channel_number mode {auto | desirable | on} // Add the physical port to an Ethernet channel and determine the PagP mode. 3) layer-2 Ethernet Channel Configuration Switch # configure terminal Switch (config) # interface range fastethernet 5/6-7 (Note: spaces are required)

server and the client are in the same network segment and are not DHCP relay agents, for Cisco's DHCP In the case of a server, if a request packet with Option82 is received, it is considered a request message from a DHCP relay agent, and the Giaddr field of the message is checked, but because it belongs to the same network segment, the field is 0.0.0.0 DHCP. The server will consider an illegal address, and this message will be discarded, causing the client to obtain no IP address(iv)