Common Enterprise router configuration errors

For enterprise network O & M personnel, enterprise router configuration is the most basic work, so they must have some understanding of it. Here is a brief introduction. It is helpful to know some knowledge about enterprise vro configurations. Here we mainly explain the solutions to common errors in enterprise vro configurations. Generally, when enterprises perform basic vro configurations, the main points of attention are the wide area network, lan, and public servers.

However, in actual configuration operations, enterprise administrators often have insufficient understanding about the configuration operations and structure principles of Enterprise routers, this leads to the bottleneck of the overall network performance caused by poor Enterprise router configuration. In this article, we will analyze and describe some common router understandings and Common Errors in enterprise router configuration, and propose corresponding corrective measures.

1. A vro with multiple WAN ports can overlay the connection bandwidth of the entire network.

As a result of information technology, many enterprises need to perform a large number of download operations from time to time, which causes the original ADSL bandwidth to be tight. Many network administrators believe that using multi-Wan Port Routers and applying for multiple ADSL lines, it will overlay the bandwidth. In fact, this recognition is wrong. The multi-Wan port router does not increase the overall rate of broadband access because it can support multiple ADSL lines. It only provides an effective management solution for enterprise networks; for example, different applications are allocated with different ADSL lines, cross-network access is required, and backup is required. For example, the two lines connecting China Telecom ADSL and China Netcom ADSL are mainly used for uploading and downloading data because of the stable access and high transmission rate of China Telecom ADSL. The quality of China Netcom ADSL access is normal, it is mainly used for searching and searching materials.

2. Non-regulated DHCP service configuration

The advantage of the DHCP server is that you do not need to make any settings on the computer, which is more convenient for users. However, the disadvantage of DHCP is that, without any control, any user can access the enterprise's network, and it is easy to launch internal attacks, resulting in an impact. Therefore, an enterprise can issue an IP address through DHCP, but at the same time limit the IP address that can be obtained by the calculator for management. For example, if you select a vro that supports IP/MAC binding, you must specify the MAC address of the calculator to issue a specific IP address during configuration so that you can manage the IP address. At the same time, the IP/MAC binding function can also prevent users from modifying IP addresses to gain higher permissions, and thus prevent ARP attacks.

3. The POS interface configurations at both ends of the router are inconsistent

When two enterprise routers configure the POS interface, some users do not pay attention to the consistency of the configurations of the two enterprise routers, resulting in the inability to communicate between the routers. For a Cisco router, the POS interface by default does not allow line-based interference. If one end is configured with line-based interference while the other side does not, it cannot communicate with each other; therefore, in the process of Interworking with the POS port of the Peer router, you should pay attention to determining whether the line is subject to interference. Command: pos scramble-atm is allowed for cabling. no pos scramble-atm is allowed for cabling. In addition, pay attention to the configuration of the MTU value of the interface. Generally, the Cisco router POS port uses the MTU value of 4096. When the MTU values at both ends are inconsistent, you only need to set the MTU value at one end of the router to 1500.

4. Route table configuration is not taken into account when network connectivity is found

The main task of a router is to find an optimal transmission path for each data frame passing through the router and transmit the data to the destination site effectively. Therefore, the routing algorithm is the key to selecting the optimal route. In order to do this, the route table of various transmission paths is saved in the router.

Generally, the route table can be set by the system administrator or dynamically modified by the system. It can be automatically adjusted by the router or controlled by the host. However, some network administrators modify other configurations of the router without considering the correct configuration of the route table, resulting in more associated problems. To view the route table, enter the "Router # show ip route" command. The records starting with C in the table are the CIDR blocks directly connected to the vro. If the port address is configured, this record appears in the route table. Although routers can communicate with each other, but no route is set, the host cannot ping each other.

In addition to considering the Peak Performance of a router product, how to discover the potential advantages of the product to serve the enterprise network is also a concern during the configuration of the enterprise router. Of course, the topic about router configuration errors in this article will also involve many aspects of the configuration, such as the router OSPF measurement indicators, OSPF matching parameters, and subnet passwords, the key issue is that the network administrator must carefully understand the product description and be familiar with the enterprise network environment, so as to avoid various enterprise interconnection and interoperability faults caused by the enterprise router configuration problems.

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