Note: There is no source code analysis in this article. However, I think it is more useful to understand the essence than to understand the source code, because after understanding the essence, you may not need to look at the source code again, you can even write the source code. This is why the Linux kernel and Cisco websites contain a large number of documents.
Introduction: routing is a core concept of the Inte
The topology is as follows:
The simple way to provide Internet access for the CE router is to let the interface on the PE connected to the CE router be in the global routing space, the PE router has a VRF interface pointing to the CE router, and an interface to the CE router but not the VRF. Then the CE router can send VPN traffic to the VPN interface and send the In
-address 192.168.1.1 The IP is not assigned by DHCPIP DHCP pool dhcp-test Configure DHCP address poolImport all (importing DNS and WINS server)Network 192.168.1.0 255.255.255.0 IP address range for the DHCP address poolDefault-router 192.168.1.1 Set default route (that is, Gateway) Sixth step: Configure NAT:Access-list 1 Permit 10.1.1.0 0.0.0.255 Setting the range of IP addresses allowed to access the extranetIP nat inside source List 1 interface Dialer 1 overload set NAT address translation fr
this by representing the target and subnet masks in binary notation. A binary subnet mask consists of a series of 1 representing the destination network address portion and a series of 2 parts representing the destination host address portion. View the target to determine whether the host address portion of the target (as defined by the subnet mask) is set to 1.
Only the Windows NT 4.0, Windows 2000, Windows Millennium Edition, and Windows XP route commands support the-p parameter. The route c
specific address 127.0.0.1 (the lo0 interface is a "fake" Nic inside the IP protocol stack ).
The second item of the routing table principle is very interesting. To prevent the host from defining every route that may reach the network on the Internet, you can define a default route, if no entry matches the destination address in the
relationship between the IP address and the MAC address of Host B in its own ARP cache table. At this point, the switch has learned the MAC address of host A and Host B.Detailed routing TableRouters are responsible for communication between different networks, it is an important device in today's network, it can be said that there is no router on the internet to
corresponding relationship between the IP address and the MAC address of Host B in its own ARP cache table. At this point, the switch has learned the MAC address of host A and Host B.
Detailed routing TableRouters are responsible for communication between different networks, it is an important device in today's network, it can be said that there is no router on the
, including its own MAC address.4) After receiving the data frame of this response, host A records the corresponding relationship between the IP address and the MAC address of Host B in its own ARP cache table. At this point, the switch has learned the MAC address of host A and Host B.
Detailed routing TableRouters are responsible for communication between different networks, it is an important device
Win2003 for routing LAN sharing multiple export internet
First, the case
The computer center of the university has a total of 240 computer rooms, has been connected to the local area network, to access the school resources through the campus network interface, and access to external resources through the ADSL interface.
Second, solve
Windows XP and Windows 2003 come with ADSL broadband dialer, which can
do ISPs control and manage their networks while entering the light internet age?
Speed can kill! Control is important if you are playing a car at a 15m.p.h speed on Disney's Autotopia, but you're not going to get hurt. On the other hand, if you find yourself on the Indianapolis500, then, the high performance of the brakes, tires, and driving the controls provided, will be very important for your survival.
This article will assume that we have enter
The Border Gateway Protocol, also known as BGP, is mainly used to connect to the routing protocol of independent systems on the Internet, it is an enhanced, comprehensive, and scalable protocol developed by the Internet Engineering Task Group.
1. routes include two basic actions: determining the optimal path and transmitting information groups (usually called gro
netmask" error message is displayed. This error occurs when one or more bits in the target are set to 1, and the corresponding bit in the subnet mask is set to 0. This can be checked by means of a binary notation for the target and subnet masks. The subnet mask in binary representation includes a series of 1 representing the destination network address portion and a series of 2 parts representing the destination host address portion. View the target to determine whether the target's host addres
through the China Netcom line, and access to the load balancing of telecom resources to go through the China Telecom line.
Comprehensive Performance
The Internet cafe router is very complicated, so it cannot stand out in some aspects alone. It also requires comprehensive development in performance, functions, security, and other aspects to make full use of its advantages, it briefly describes the performan
The latest method to solve China Telecom Netcom's blocked routes and the number of connected machinesRecently, China Netcom and China Telecom have all added restrictions on the number of machines on the Internet, and many people have seen a lot of ways! Not ideal !!Let me teach you a simple method! You don't need to use hardware to implement two steps!Step 1! Still the original method! Routing networking!Ex
relationship between the IP address and the MAC address of Host B in its own ARP cache table. At this point, the switch has learned the MAC address of host A and Host B.
Detailed routing TableRouters are responsible for communication between different networks, it is an important device in today's network, it can be said that there is no router on the internet
Tags: external network address assignment related 5.0 ETH Inux Snat forwardProblem descriptionIntranet client machines access the Internet through a gnu/linux server. The Eth0 network card of the server can access the Internet, and eth1 network card is connected with intranet. The client wants to access the Internet through the server.Experimental environment
prevent the arrival of any one packet, as long as the arrival of the query routing table, it is possible to cause cache jitter. More seriously, the routing cache is susceptible to an attack caused by well-constructed packets, with frequent replacements or unlimited extended lists, which adds to the query overhead.Therefore, it is more efficient to design a
Detailed explanation of Null0 interface and routing black hole generated after the completion of the NAT gateway on the InternetWhen it comes to the Null0 interface, let's take a look at the routing black hole. The so-called black hole routing, as its name implies, is to suck all irrelevant routes into it, so that they have endless routes-equivalent to a temporar
IETF is setting up a new working group to solve the scalability problem in the Internet routing system. This problem is caused by the Division of network traffic between various operators. The Working Group will be built on a proposal from the Cisco engineer team to build a new tunneling mechanism for Internet edge and core routers.
This new approach, known as LI
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