Many enterprises now have their own Metro Ethernet services. Here we will give you an analysis of the coexistence of Metro Ethernet and traditional WAN services, South Korea's Enterprise Networks Company (formerly GNG Networks) an Optical Transport MAN (MAN) is being built along the subway lines in six major South Korean cities (including Seoul) and plans to provide Metro Ethernet services for enterprises. Enterprise Networks uses the Cisco 15454 Optical Transport Platform.
It is equipped with a
actual use, I found that the upload and download functions in the monitoring mode of the 3550 switch are not stable, and the transmission failure is often prompted. Therefore, the author simply deletes config. text in monitoring mode, and then restarts the switch to reconfigure all the switch information. This situation applies to the fact that the vswitch does not have many configurations and is not complex. In addition, the network administrator mu
Cisco switch iOS upgrade, actually quite simple, but need to note is, can not let the switch flash storage is empty, must have an iOS in, or no iOS in Flash, waiting to upload iOS with Xmodem, so your time can be a lot of waste ah. Because the Rommon mode is not available for the Cisco Catalyst 2950, 2960, 3550 Switch lost iOS or iOS failure, because there is no, only the Cisco Catalyst 4006, 4506 has Rommon mode, This article takes the Cisco Catalyst
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Configure linux as the log host of the pix, switch, and router-Linux Enterprise Application-Linux server application information. For more information, see the following. I. linux Configuration:
1. vi/etc/sysconfig/syslog (press I to enter the vi editing status, Press ESC to return to the command line status after the editing is complete, and then enter: wq to save the disk and exit, if you do not save the disk, enter q! )
Modify SYSLOGD_OPTIONS = "-m 0"
SYSLOGD_OPTIONS = "-r-m 0" //-r allows th
optical fiber and optical transceiver in the middle Cisco 6509 is configured as: super engine SUP720, a 16-port Gigabit Optical module WS-X6816-GBIC, A 48-port fast switching electrical module WS-X6548-RJ-45 ).
Trunk is set up on the corresponding port connecting the optical transceiver's 6509 and the annett switch's frame sealing failure. The annett switch is divided into two VLANs, 172.25.6.0/24 or earlier, VLAN6) and 172.25.7.0/24 (VLAN7), machines in the two Departments are connected to the
. Otherwise, a broadcast storm occurs.. If the domain is H3C, you do not need to enable the digest feature.. After enabling the digest listening function. The switch keeps the configuration summary received recently. Even if the port that enables the digest listening function fails. The previously received configuration summary still takes effect. Configuration instance: Two cisco1_7 instances. Two floor switches. One is 3550. One is H3C3600 C3550-S3:
Vswitch port image configuration Daquan (bringing together 22 different brands of switches) 1. CISCO (CISCO) Switch www.2cto.com 1.1 configure the image (SPAN) port Switch (config) # monitor session 1 source interface fastethernet 4/10 Switch (config) # monitor session 1 filter vlan 57 Switch (config) # monitor session 1 destination interface fastethernet 4/15 if you want to release this SPAN task, run the following command: Switch (config) # no monitor session 1: The following statement shows h
A Cisco router uses Cisco 3620 as the ios dhcp Server. the IP address of the fastethernet0 port connected to the Intranet is 192.168.1.4, And the L2 Switch uses two Cisco 2950, A layer-3 Switch uses a Cisco 3550. There are two VLANs in the network. To simplify the description, assume that each VLAN uses a 24-bit network address. The IP address of VLAN1 is 192.168.1.254, And the IP address of VLAN2 is 192.168.2.254. Implement the ios dhcp Server functi
for others. After the vswitch is powered on and restarted, you can go to the vswitch configuration page and find that you can reconfigure the vswitch password, including the management password for remote TELNET and the privilege password of the local machine. After that, the switch password will be changed to the one you just configured, while other configurations will remain unchanged and will not affect any usage.
TIPS:
In actual use, I found that the upload and download functions in the mon
Example:
3026
2012
5012. The value of 2nd bits is 0 ~ 4 indicates that it is a layer-2 switch.
3550. The fifth digit is 5 ~ 9 indicates that it is a layer-3 switch.
LI (LitesoftwareImage) indicates that the device is a weak feature version.
SI (StandardsoftwareImage) indicates that the device is in the standard version and contains basic features.
EI (EnhancedsoftwareImage) indicates that the device is an enhanced version and contains some adva
in the system hard disk in the notebook and run the following statement:
Enable secret level 1 5! E, 1u _; C9 -8U0H
Enable secret level 15 5 * r_1u _; C3vW8U0H
Delete and save and exit.
Step 10: Download the modified config. text in the notebook to the switch according to the prompt in the switch monitoring mode.
Step 2: Set the serial port speed of the Super Terminal of the notebook to 11th again, and keep the default parameters for others. After the vswitch is powered on and restarted, you ca
Cisco switches enable port speed limiting
As shown in, Node switch 3550 is placed in an office room. The networks of all office companies are from this place. How does the operator configure network bandwidth settings for each company on this device? Let's take the IT Training Center of XX foreign companies as an example. The IT Training Center of XX foreign companies applied for a 2 m link.
Step-1
Rongxin # config t
Rongxin (config) # mls qos // en
Note: switchport mode trunk can run directly on the 2950 switch, which enables 802.1q directly. To enable the relay function on vswitches such as 3550 and 4500, you must first select the encapsulation method, that is, run switchport trunk encapsulation dot1q.Sw0 # vlan databaseSw0 (vlan) # vtp domain ContosoSw0 (vlan) # vtp password ContosoSw0 (vlan) # vtp serverSw0 (vlan) # vlan 10Sw0 (vlan) # vlan 20Sw0 (config) # interface range gigabitEthernet 0/1
Disable forwarding of a specific MAC address on a cisco SwitchIt is really annoying to see other illegal DHCP in the LAN. In addition to the dhcp snooping method, you can also directly disable the mac address! The MAC address of machine A is 00-01-02-03-04-05, which is connected to port F0/3 of Switch B, port F0/3 is in VLAN3. Currently, forwarding of A is blocked on port B. You can set the following according to different vswitches: CatOS (v5.5 or above ): set cam permanent 00-01-02-03-04-050/4
Http://www.chinaitlab.com/cisco/RIP/832426.html1. IntroductionAt present, the realization of real-time voice, video communication and application in IP network has become a mainstream technology and development direction of network application, this paper introduces the standard protocol RTP for real-time voice and video data transmission in IP protocol family (real-time Transport Protocol) and RTCP (RTP Control ptotocol) are the main features.2. Introduction of RTP/RTCP protocolRTP is defined b
Http://www.justwinit.cn/post/2295/
Every time you go to chmod-R *; chown-r nobody. nogroup * is very troublesome. Write a script to solve it. Then you can directly call the securecrt script -- run -- select the script!CodeAs follows:
Sub mainCRT. Screen. synchronous = trueCRT. Screen. Send "chmod-r 755 *" vbcrCRT. Screen. Send "chown-r nobody. nogroup *" vbcrCRT. Screen. Send ""CRT. Screen. synchronous = falseEnd sub
[Preface]Securecrt is a popular and popular remote logon and terminal si
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