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protocol is globally enabled. However, if it is used together with older Cisco devices, you may need to manually start the Discovery protocol. You can RUN the cdp run Command, you need to enter the interface configuration mode and enable cdp on the interface using CDP enable. However, unlike the global mode, the Discovery Protocol on the interface is not enabled

See an article is about the SQL statement or the execution of Union all efficiency comparison, did not pay much attention to this problem, feel the article is good, turn to see. Article original link: http://www.cunyoulu.com/zhuanti/qtstudy/20081124orunion.htmComparison of the execution efficiency of the SQL statement or with UNION ALLWhen a SQL statement has multiple or statements, consider using union or union all instead to increase the speed. SQL statements that use or are often unable to be

Spring also supports Java code-based configuration metadata. But this is a less common approach, but there are some people who use it. So it is necessary to introduce.Spring is based on Java code Configuration metadata, which can be declared as a configuration class by @configuration annotations, and a new one through the @bean annotationsThe classes that are created are managed by the spring container. In this configuration, we can assemble the beans manually, or we can assemble the beans autom

Lucene word breaker and highlightingWord breakerIn Lucene we follow the word segmentation method to index the document, different word breaker index effect is not the same, the previous example used is the standard word breaker, for the English effect is very good, but the Chinese word segmentation effect is not how, he will follow the words of Chinese characters direct participle, no concept of words.Using the word breaker only needs to instantiate analyzer as our third-party word breaker.There

the complexity of O (n) algorithms to ensure that the data between datasets are not duplicated. With the theoretical basis, you can change the SQL structure. After ensuring that there are no duplicates in the Data logic, you can change the two Union statements to Union all, the response speed of a query changes from 1.7 seconds to 300 milliseconds, which takes only 17% of the previous time. Union is also useful. In the query of massive data, if we use select * From c_cons where cons_id in ('123

modem modeAUI interface to turn RJ45 port. AUI connectors are DB15AUX, Remote connection configuration portS0/s1Console configuration PortISDN BRI PortWarning: You cannot connect a non-ISDN device to a router's ISDN product, otherwise damage the device!Console connection:RJ45 (console port)-rj45todb9 adapter-pc1, the PC needs a RJ45 conversion to DB-9 or DB25 converter.2, the communication port set to 9600 baud rate, 8 data bits, do not set parity bit, 1 stop bit, not set flow control.3, the AU

the enterprise. In the past, many enterprises in the event of data loss can not be restored, the enterprise immediately announced the collapse of the message no longer a few. Visible, enterprises need a high-efficiency disaster recovery equipment is the survival of the enterprise. The high-performance, highly available disaster recovery intelligence dominating from the United software is used to address Health Bureau data security.Scenario Preview:Disaster-tolerant tripod uses high-performance

On-Demand Routing principle (ODR-On Demand Routing)ODR uses Cisco's Discovery Protocol CDP to transmit network information between the branch router and the central router. It is only applicable to the central-branch topology environment. The vrolan may have connected several LANs, however, there is usually only one WAN connection instance that reaches the central router: basic configuration: listen tint s0/0 clock rate 64000ip add 12.1.1.1 comment sh

Switch command-Huawei1. Set the host name/system name on the IOS-based switch:Switch (config) # hostnameSet the host name/system name on the CLI-based switch:Switch (enable) set system name-string2. Set the logon password on the IOS-based switch:Switch (config) # enable password level 1 passwordSet the logon password on the CLI-based switch:Switch (enable) set passwordSwitch (enable) set enalbepass3. Set remote access on the IOS-based switch:Switch (config) # interface vlan 1Switch (config-if) #

access on a CLI-based switch:Switch (enable) set interface sc0 ip-address netmask broadcast-addressSwitch (enable) set interface sc0 vlanSwitch (enable) set ip route default gateway The Huawei Switch configuration tutorial starts and views CDP information on an IOS-based switch:Switch (config-if) # cdp enableSwitch (config-if) # no cdp enableTo view

1. Set the host name/system name on the IOS-based switch: Switch (config) # hostname Set the host name/system name on the CLI-based switch: Switch (enable) set system name-string 2. Set the logon password on the IOS-based switch:Switch (config) # enable password level 1 passwordSet the logon password on the CLI-based switch:Switch (enable) set passwordSwitch (enable) set enalbepass 3. Set remote access on the IOS-based switch:Switch (config) # interface vlan 1Switch (config-if) # ip address ip-

(config-line) #transport input Telnet//set protocol that can be logged in (default all)R1 (config-line) #transport output telnet//device can log out of protocol (default all)}R1 (Config-line) #endCDP: Cisco Discovery Protocol (CDP:CISCO Discovery Protocol) Cisco Discovery Protocol CDP is basically used to obtain the protocol address of neighboring devices as well as the platform to discover these devices.r1>enR1#conf TR1 (config) #

1. Set host name/system name on iOS based switch: Switch (config) # hostname hostname To set the hostname/system name on a CLI-based switch: Switch (enable) set system name name-string 2. Set the login password on the iOS based switch: Switch (config) # Enable password Level 1 password To set the logon password on a CLI-based switch: Switch (enable) Set password Switch (enable) Set Enalbepass 3. Set up remote access on iOS-based switches: Switch (config) # interface VLAN 1 Switch (con

1. Set host name/system name on iOS based switch: Switch (config) # hostname hostname To set the hostname/system name on a CLI-based switch: Switch (enable) set system name name-string 2. Set the login password on the iOS based switch: Switch (config) # Enable password Level 1 password To set the logon password on a CLI-based switch: Switch (enable) Set password Switch (enable) Set Enalbepass 3. Set up remote access on iOS-based switches: Switch (config) # interface VLAN 1 Switch (con

Set the host name/system name on the IOS-based switch:Switch (config) # hostnameSet the host name/system name on the CLI-based switch:Switch (enable) set system name-string2. Set the logon password on the IOS-based switch:Switch (config) # enable password level 1 passwordSet the logon password on the CLI-based switch:Switch (enable) set passwordSwitch (enable) set enalbepass3. Set remote access on the IOS-based switch:Switch (config) # interface vlan 1Switch (config-if) # ip address ip-address n

-address netmask broadcast-addressSwitch (enable) set interface sc0 vlanSwitch (enable) set ip route default gateway 4. Enable and browse cdp information on the configuration password of the Huawei switch based on IOS:Switch (config-if) # cdp enableSwitch (config-if) # no cdp enableTo view CDP announcement information

0/1 view switch 1 interface specific configuration and statistical information Show Mac-address-table view MAC Address Table Show mac-address-table aging-time view MAC Address Table automatic aging time 9: Switch Restore factory default RESTORE command Switch> Enable switch# Erase Startup-configure switch# Reload 10: Duplex Mode settings Switch> Enable Switch#configure Terminal switch2950 (conf) #hostname aptch-2950 aptech2950 (CONF) # interface Fastehernet 0/17 with 17 ports for exa

Cisco disables Some uncommon Services 1. Cisco Discovery Protocol CDP is a Cisco dedicated protocol that runs on Layer 2 of all Cisco products, shared basic device information with other directly connected Cisco devices. Independent of media and protocols. Hackers can use CDP information in the investigation and attack again, which is less likely. Because only CDP