cisco routing and switching book

only receives a frame with a source address of AA-AA-AA-AA-AA-AA on the port port1/2 and then changes its top Mac forwarding Address table entry to the wrong port! As the frame spins in the opposite direction (recalling that loop forwarding exists in two directions), you will see that the MAC address of the HOST-A will beswitch back and forth between Port 1/1 and Port 1/2. in short, not only the unicast ping package will continue to fill the entire network, and the bridge MAC address forw

from source and destination IP to Source andTarget mac, which is forwarded according to Mac .4. Different Technologies involvedAt the data link layer are VLANs,trunks,VTP ( Cisco private ),STP, link aggregation, port security, etc.In the network layer there are dynamic routing protocols,ACLs,NAT , and so on.This blog post on the contents of the content if there is not correct or unreasonable, but also plea

-00-0C has a smaller oui--that is only 12 in number. As a result, your MGS will always be smaller than the MAC address of the catalyst switch you buy, so it will always win a root battle in the Cisco Network (as well as other networks on the planet). In other words, if you ignore the location layout of the root bridge, there are probably 1000 factors that can degrade your network throughput. Obviously, manually controlling your root bridge is criti

Cisco 2800 Password cracking1. Restart the router byCtrl + BREAK +FNKey to enter monitoring mode2. Modify the Register value to change the start orderRemmon>confreg 0x21423. Restart Routing in monitoring modeRemmon>resetLook, here we go into the system. User mode no passwordRouter>enablerouter#Copy Start Running-configDestination filename [running-config]?552 bytes copied in 0.416 secs (1326 bytes/sec)We en

"Copyright notice: Original translation articles, translation level is limited, errors are unavoidable,The Translator is not responsible for the consequences of errors or omissions in the article, please be careful to reprint them. Reproduced please retain this statement and source: blog.csdn.net/shallnet, download the English version of the book "I have never known why Cisco Lan

Recently I started to read this book on TCP/IP routing technology. Although it is difficult to understand at the current level, I am still willing to go and see it. Every time you read a section, sort it out. Although not summarized in your own words. However, it is better to use some original articles. Because you have little experience. Understanding is not thorough enough. Extract the classic data. I wil

"Copyright notice: Original translation articles, translation level is limited, errors are unavoidable, The Translator is not responsible for the consequences of errors or omissions in the article, please be careful to reprint them. Reproduced please retain this statement and source: blog.csdn.net/shallnet, download the English version of the book "The author of the book thanked Radia Perlman for his time i

, this improves the forwarding speed, but it does not fundamentally change the data forwarding process. This is "one route, multiple exchanges". What is the difference between layer-3 switching and layer-3 routing: 1. A layer-3 switch can provide a much higher forwarding rate than a vro, while a vro has a lower forwarding rate.2. A layer-3 Switch generally only supports IP protocol forwarding. A vro general

backplane (such as Catayst 5500 and 6000). bid High-byte domain is the bridge priority, do not confuse the bridge priority and the seventh chapter "Advanced Spanning Tree." The port priority discussed, the bridge priority is a two-byte (16-bit) value, an unsigned 16 is an integer with 216 possible indications, and the range is 0-65535. The default bridge priority is the median value of 32768, which is described using the 10 binary. Note:This book

"Copyright notice: Original translation articles, translation level is limited, errors are unavoidable, The Translator is not responsible for the consequences of errors or omissions in the article, please be careful to reprint them. Reproduced please retain this statement and source: blog.csdn.net/shallnet, download the English version of the book "It seems that the spanning tree protocol is still not perfect enough to be satisfying, in fact, because

root is not a normal command-it is a macro that affects other commands. In other words, Set Spantree root does not appear in the command result of Show config . For example, you run a macroset Spantree root 1, assuming that the current root bridge priority is greater than 8192, the macro automatically executes the set spantree priorities 1 8191 command. After the command set Spantree priority is written to NVRAM, there are no signs of using macros. despite Set Spantree root is just a macro, bu

State and its possible transition to. Figure 6-11. Possible Port states and TransitionsFigure 6-12 shows an example of a network port classification and status show, noting that all ports except CAT-C:PORT-1/2 are forwarding states. Figure 6-12. Sample Network with Port states identifiedTable 6-4 lists the shorthand symbol tables used in this book instead of the spanning tree state. Table 6-4. STP state and Port Symbols state/port