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Backup center and VRRP

Backup Center Configuration backup center OverviewTo improve network reliability, VRP uses the backup center to provide comprehensive backup functions:1: The backup interface is called the primary interface. Any physical interface or sub-interface on the vro can be used as the primary interface. A logical channel such as X.25 or a virtual circuit of Frame Relay on any interface can also be used as the primary interface.2: The backup interface for other interfaces is called the backup interface.

Evolution of Circuit switches to media gateway controllers

required to process IN business requests under the control of SCF ◆ Business interaction management 4) protocol functions  As an open, multi-protocol entity, standard protocols must be used to communicate with various media gateways, terminals, and networks. These protocols include: h.248, SCTP, ISUP, TUP, INAP, H.323, RADIUS, SNMP, SIP, M3UA, MGCP, BICC, PRO, BRI, etc. 5) interconnection functions  The signaling gateway can be used to achieve interc

In-depth analysis of the powerful functions of the Cisco 2600 Module

Cisco network module slot, and a new advanced integration module AIM) slot. Cisco 1600. The WAN interface cards used by the Cisco 2600 module and the Cisco 3600 series routers support a variety of serial ports, isdn bri, And CSU and DSU) and other options to achieve master-slave WAN connection. The network modules used in the Cisco 2600 and Cisco 3600 series support multiple options, including high-density serial ports, dial-up pools, and multi-servi

LAN and WAN interface standards

; 38400bps-78m; 56000bps-60m; 64000bps-50m; 2048000b. Below are several common but important control signals in v.24 and v.35 procedures: Dtrdata terminal ready, data terminal ready) Dsrdata set ready data preparation), mainly used to transmit negotiation information between devices. Dcddata carrier detect data carrier detection), used by devices to detect the current link status. Rtsrequest to send requests) Ctsclear to send clear and send) Bri: Conn

Simple for CCNA)

DDR:Router (config) # dialer-list Group-Number protocol Protocol-Type permit [list ACL-Number]Router (config) # interface bri 0Router (config-if) # dialer-group Group-NumberRouter (config-if) # dialer map Protocol-Type Next-Hop-Address name Hostname Telphone-NumberRouter (config-if) # ^ z configure ISDN:Router (config) # isdn swith-type Swith-Type Router (config-if) # ^ z Configure Frame Relay:Router (config-if) # encapsulation frame-relay [cisco | i

Security configuration scheme of Cisco IOS Firewall

internal address and the egress addressDisadvantage: When the egress address resources are scarce, only a small number of hosts can be connected to the internet. 2. Internal address share egress addressThe router uses the egress address and port number, as well as the external host address and port number as the interface. The internal address port number is a random number greater than 1024, and the external host port number is recognized as a standard port number. In this way, you can use the

A Quick Guide to VoIP on-the-cheap with asterisk

negotiated at call setup.Application in the real world The server that we have specified for this application has the ability to handle around und 1000 concurrent CILS through the gateway and enough storage for voicemail boxes for all users. CILS have no real effect on the server inside the PBX because of one of the amazing SIP features: reinvite. the reinvite feature allows the SIP proxy to set up the call and then directly connect the endpoints to each other for the audio flow. the server onl

Application of dynamics CRM in large enterprises

2009 year 6 month 3 , microsoft and Intel announce Cali Bri " lang=" En-us "> CRM 4.0 the benchmark test proves that Microsoft CRM run on Intel Xeon 5500 5 over 2.9 millions of daily visits, it can run well. At the same timeOracle SiebelIn2008Year10Test results of the month: font-family:Calibri" lang="en-US">Oracle Siebel 8.0:14,000宋体" lang="zh-CN">User/1.6Millions of visits per day:Calibri" lang="en-US">US $150,000

2014 network administrator-exam exercise Questions and answers (2)

() communication methods. A. Point-to-Point B. opposite to the point C. Face points D. Face to face 17. In the bri service of ISDN, the speed of a B channel is () A. 64 Kbps B. 128 Kbps C. 256 kbps D. 1 Mbps 18. The advantage of using a domain name is () A. Convenient Management B. Easy to remember C. Save Money D. Convenient Input 19. There are two switch methods. The () method is suitable for scenarios with many line errors. A. Direct forwarding B.

Ccna Lab 1: basic configurations of Cisco devices

indicates that the configuration is not loaded into the system, often used for Password Recovery 4: Common show commands Ccna # showrunning-config # view the current configuration, including the default configuration of the device Ccna # showstartup-config # view the startup configuration, that is, the saved configuration Ccna # showversion # view the version system, that is, display the main content of system self-check Ccna # showflash: # view the flash, including space and file confidence

Switch Port Mirroring

Port mirroring, which forwards data traffic from one or more ports to a specified port via a switch or router for traffic monitoring analysis.The function of mirroring is simply to mirror the monitored traffic to the monitoring port so that the monitored traffic can be faulted, traffic analyzed, and the traffic is backed up, the monitoring port is usually directly connected with the monitoring host.Take Cisco as an example:1. Connect to the switch using SSH or Telnetl and enter the user name and

You must know. net

our reply after 24 hours of sending the text message, please call (010) 88254369. The winners in June were from Beijing, Shanghai, Xi'an, and Guangdong respectively. They both selected "not far from the road-in-depth analysis of ASP. NET control development" (China-Pub purchase address ). Winners:Zhang Ronghua [Zha "You must know. Net" @ gmail.com] Wu binbe, you must know. net, @ foxmail.com Si Hao [ou "You must know. Net" @ mail.com] Zhang tiefeng [ztf _ "You must know. Net" @ 163.com] This t

Interface cable standard for LAN and WAN

; 9600bps-312m; 19200bps-156m; 38400bps-78m; 56000bps-60m; 64000bps-50m; 2048000b. 6. below are several common but important control signals in V.24 and V.35 procedures: DTR (Data terminal ready, Data terminal ready) DSR (Data Set Ready Data preparation) It is mainly used to transmit negotiation information between devices. DCD (Data Carrier Detect Data Carrier detection) Used by devices to detect the current link status. RTS (request to send) CTS (clear to send clear send) 7.

Learning PPPOE configuration (1)

(config)#intfast0/0 ATM1(config-if)#noipaddress ATM1(config-if)#bridge-group1 ATM1(config-if)#intatm1/0 ATM1(config-if)#noipadd ATM1(config-if)#bri ATM1(config-if)#bridge-group1 ATM1(config-if)#pvc1/100 ATM1(config-if-atm-vc)#encapsulationaal5snap ATM1(config-if-atm-vc)#bridge1protocolieee Configure BBA-Group ATM1 (config) # bba-group pppoe global ATM1 (config-bba-group) # virtual-template 1 virtual touch version is

CCNA Study Notes 13-WAN ppp

PPPoE session PADT packet may be sent within the selected time after the session starts. It is mainly used to terminate the PPPoEPPPoE basic principle (session phase) configuration.Server: layer-3 nested configuration; address pool defined; a template defined and an address pool called; pppoe group called template, pppoe group is applied to int f1/0 no shu pppoe enable group cisco under the interface to enable pppoe, call the cisco group bba-group pppoe cisco to define the PPPOE group name cisc

Simple code for Brightness contrast adjustment of grayscale images

Code:#include using namespaceCV;intBrightness =5;intcontrast =5; Mat src; Mat Brightnesscontrast;voidBrightnesscontrastfilter (int,void*){ floatBRI = Brightness/5.0f; floatCont = contrast/5.0f; //Brightening ImagesCv::mat Bright = src*(BRI); //Average Brightness floatsum =0; for(inti =0; i ){ for(intj =0; J ) {sum+ = Bright.at(i, j); } } floataver = SUM/(bright.cols*bright.rows); Cv::mat averimg=cv::mat::ones (Bright.rows, Bright.

Network devices-Cisco-Switches (example 3750) stack end configuration Chapter

software has*mar 1 00:03:35.721:%imagemgr-6-auto_advise_sw:been added to the stack. The storage*mar 1 00:03:35.721:%imagemgr-6-auto_advise_sw:devices on any of the stack members has*mar 1 00:03:35.721:%imagemgr-6-auto_advise_sw:been scanned, and the software required*mar 1 00:03:35.721:%imagemgr-6-auto_advise_sw:to make all stacks members compatible with*mar 1 00:03:35.721:%imagemgr-6-auto_advise_sw:each other is not found. The "Archive*mar 1 00:03:35.721:%IMAGEMGR-6-AUTO_ADVISE_SW:DOWNLOAD-SW

CCNP Study notes----VRRP (industry standard)

The same principle as HSRP, two physical devices virtual one IP and MacDifferences from HSRP:1, roleHSRP Active/standbyVRRP Master/backup2, virtual addressHSRP cannot be a virtual network address that already existsVRRP can be a virtual network already exists address3,Hello packet intervalHSRP master ready to send hello; address 224.0.0.2; interval 3s timeout 10sVRRP only Master sends helloInterval 1s timeout 3sMulticast address 224.0.0.184, shootout modeHSRP Manual OpenVRRP is turned on by defa

Sicily Online Judge 1438. Shopaholic (Quick row, three summation)

maximum discount Lindsay can get.InputThe first line of input gives the number of test scenarios, 1≤t≤20. Each scenario consists of lines of input. The first gives the number of items Lindsay is buying, 1≤n≤20000. The next line gives the prices of these items, 1≤pi≤20000.OutputFor each scenario, output one line giving the maximum discount Lindsay can get by selectively choosing which items she BRI NGS to the counter at the same time.Sample Input16400

RIP of Dynamic routing protocol

receivingRouter RIPPassive-interface default//Set all interfaces to be interfaceRouter RIPNo passive-interface s1/0//Cancel a passive interfaceDebug IP RipRoute Summary >After you turn off auto-summarization in RIP, you can do a manual summary on an interface. Note, however, that the aggregated network number cannot cross the main class network. RIP does not support CIDR.650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M02/80/26/wKioL1c5lKaQg1KZAAA7pWl8484978.png "title=" screen Shot 2016

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