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CEF (Cisco Express Exchange) detailedCEF Load BalancingOne, the destination-based balance of responsibility:Destination-based load balancing allows routers to use multiple paths to balance the load. For a source/target host, packet forwarding takes the same path, which is ha
Tags: erase cmd terminal copy Cisco forgot password direct out settingLab tasks:1. Configure the password in Cisco mode routing2. How to reset the password after forgetting the passwordExperimental steps:1. Give Router a password:Router >enable#config TRouter (config) #line vty 0 4//Incoming Remote management interface#password//123 Configure password 123Exit
unique.
Default route Configuration
The default route is generally used in the stub network, and the stub network is a network with only one egress path. Use the default route to send packets that are not included in the route table of the target network. In fact, you can understand the default route as a static route with a wildcard (wildcard.
Dynamic Routing Protocol configuration method:
IGRP dynamic Protocol Configuration
IGRP (Interior Gateway Routing Protocol) is a dynamic distance vector
I. User Network Structure
1. the user has two fixed IP addresses in the initial status. The public network goes online, and one Telecom is moved one by one.
2. the VPN device has been connected to three public network ports, in which China Telecom is directly connected to the WAN port of the VPN device, and the mobile line is divided into two lines through a switch, connect to the WAN1 and WAN2 ports of the VPN device.
3. the LAN port address is 192.168.111.1.
4. Establish a VPN channel with
systems. Haproxy is very useful for web systems that are extremely large and require persistent connectivity or four-and seven-layer processing, such as e-commerce , and haproxy can also be used in MySQL Load balancing of databases (read operations)2. Difference between four-and seven-layer load balancingA four-tier load
ADSL, such as broadband access because of its economic and adequate, that is, cost-effective advantages of many small and medium-sized enterprises favored. With the development of enterprise business, especially for some medium-sized enterprises and enterprises with high dependence on network, they will consider bandwidth expansion or planning large bandwidth access. Multi-line broadband access is often its first choice, there will be some enterprises will choose "optical fiber +ADSL" and other
the configuration information on the central site.
Configure memory load configuration information from NVRAM
Configure terminal manual configuration from the terminal
Connect
Copy configuration or image data
Copy flash TFTP back up system image files to the TFTP Server
Copy running-config startup-config stores the current configuration in Ram to NVRAM
Copy running-config TFTP stores the current configuration in Ram on the network TFTP Server
Copy TF
Tags: Cisco router forgot enable passwordSteps:1. Restart the router that appears on the router ROM Monitor mode, press "Ctrl+breack" Key to enter ROM mode, such as:650) this.width=650; "title=" capture. PNG "style=" float:left; "alt=" Wkiol1nkiftr_sdkaaa1fp9kntk338.png-wh_50 "src=" https://s4.51cto.com/wyfs02/M00/A7
Http://publish.it168.com/2006/0315/20060315030001.shtml
1. DNS load balancing method
The RR-DNS (round-robin Domain Name System) takes turns by: In a DNS server,You can configure the same name for multiple IP addresses. When the client queries this name, it will get an address when parsing this name. Therefore, for the same name, different clients will get differentTo achieve
Implementation of VPN on a Cisco router: 1. software requirements: IOS with performaniseplusistmc56 is required. Currently, stable versions are 12.07T2. Hardware requirements: 8 mbflashand40mbram in DownloadIOS, the software and hardware requirements of the downloaded IOS version are prompted. 3. IPSec manual method considerations
Implementation of VPN on a Cisco
Heartbeat (nanny) of the process service between the Real Server)
* IPVS function (lvsd)
* Ipvsadm)
2. principles and structure of the Piranha solution:
The Piranha solution is a set of load balancing high availability solutions based on LVS.
LVS runs on a computer with similar configurations:
One is Active LVS Router and the other is Backup LVS
One of Linux load Balancing software LVS (concept article)
A brief introduction of LVSLVS is the short name of Linux virtual server, the Linux VM, a free software project initiated by Dr. Zhangwensong, and its official site is www.linuxvirtualserver.org. Now that LVS is already part of the Linux standard kernel, Before the Linux2.4 kernel, the use of LVS must be recompiled to support the LVS function module
ancient topic has stereotyped, in writing this article also sees the news, in recently held the 13th session network system design and realizes the USENIX Seminar, the engineer from Google also shared its self-developed Maglev load balancer. Just under the paper has not looked, looked back to write.Reference[1] HAProxy documentation. HAProxy Management Guide[2] HAProxy documentation. HAProxy Starter Guide[3] Willy Tarreau. Making applications scalabl
According to the online article collation.Load balancer software LVs (Linux Virtual Server) concept paperLVS is based on the Linux operating system to establish a virtual server, to achieve the load balance between service nodes. It is implemented based on the Linux kernel. The 2.6.X kernel is integrated with the LVS module by default.The implementation of common load b
balancing operation,one needs several CARP interfaces that are configured to the same IPaddress, but to a different VHIDs. Once an ARP request is received, theCARP protocol will use a hashing function against the source IP addressin the ARP request to determine which VHID should this request belong to.If the corresponding CARP interface is in master state, the ARP requestwill be replied, otherwise it will be ignored. See the EXAMPLES sectionfor a p
. Mode=0 (BALANCE-RR) (Balanced rotation strategy)Link load balancing increases bandwidth, supports fault tolerance, and a link failure automatically switches the normal link. The switch needs to configure the aggregation port, Cisco is called the Port channel.Features: Transmission packet sequence is transmitted sequentially (that is: the 1th packet to go eth0,
Experiment topology:
Lab environment: GNS3 and C3640
Purpose: To verify whether the auto-load balancing function is implemented by the kernel.
Next we will start the experiment
1. Configure an IP address for R1
R1> en
R1 # conf
Starting ing from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
R1 (config) # int lo0
R1 (config-if) # ip add 1.1.
* Mar 1
mod_jk libLoadmodule jk_module modules/mod_jk.so# Where to find workers. PropertiesJkworkersfile CONF/workers. Properties# Where to put JK logsJklogfile logs/mod_jk.log# Set the jk log level [debug/error/info]Jkloglevel info# Select the log formatJklogstampformat "[% A % B % d % H: % m: % S % Y]"# Jkoptions indicates to send SSK key sizeJkoptions + forwardkeysize + forwarduricompat-forwarddirectories# JkrequestlogformatJkrequestlogformat "% w % v % t"# Mount your applicationsJkmount/* loadbalan
backbone network from conventional third layer to comprehensive third-layer, fourth-layer switching function, its unique WAN integration capability and the access control based on layer fourth exchange have played a key role in secure and orderly network data transmission. In addition, Cabletron SmartSwitch router provides different levels of prioritization for specific business application data exchange based on the QoS features of layer fourth swit
Ifcfg-bond0 File
#vi ifcfg-bond0
The original configuration file is as follows
After modification, you need to add a static IP address (NIC bindings do not recommend using dynamic IP), subnet masks, and gateways are as follows
(Note: In addition to BOND0 set IP and other information outside the real card can not set IP address)
Edit Ifcfg-eth0 File#vi Ifcfg-eth0The original configuration file is as follows
After modification
Three network adapters are prepared.
This environment uses Cent
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