With the development of China's routing industry, we have also promoted the update and upgrade of the routing switch technology. Here we have introduced the IOS restoration method of the Cisco routing switch, and we have tried one method, after Flash is deleted, the system cannot be started. You can use X-Modem to restore it. At that time, I accidentally deleted
Configuration of a layer-3 Cisco switch 1. Start a route on a layer-3 switch. Otherwise, layer-3 switch does not have the routing function switch (config) # ip routing2. Configure the VLAN ip address
Tags: cisco/remote configurationIn actual work our routing and switches are always placed in the room to facilitate our work we need to configure the routing and switches so that we can configure the routers and switches in the office or at home.This is a simple network topology diagram where a computer-connected route configures the switch across network segmentsFirst we determine the PC ip:192.168.1.1 255
A rstp fault
Early in the morning, I received a call and the ping gateway to the direct connection failed.
No interface arp table for dis ARP
Dis mac-address without related interfaces
It seems that there are only physical problems, but it is said that interfaces and cables are okay.
View dis stp interface Ethernet 1/0/1
---- [CIST] [Port1 (Ethernet1/0/1)] [DISCARDING] ----
Port Protocol: enabled
Port Role: CIST Designated Port
Port Priority: 128
Port Cost (Legacy):
Overview of LAN switches
LAN switches have evolved from a HUB-based LAN shared in the traditional sense to a broader space. Take Cisco's Catalyst 5000 Series LAN switch as an example. It includes an integrated switching hardware structure, 10-Mbps Ethernet that supports switching, and-Mbps Fast Ethernet, supports fast Ethernet, FDDI, exchange-type ring, and layer-3 switching processing. This type of switch
experiment environment, IOS upgrades are also common. For example, if a CISCO 2950 switch is frequently suspended, the switch that is suspended does not have any warning information. After the switch is restarted, it returns to normal. By upgrading the IOS version of The vswitch from 12.11EA1 to the version later than
When configuring the Cisco 3560 switch in the morning with the Cisco Packet Tracer practice, it is found that the IP address of the port cannot be configured in port configuration mode.Switch>Switch>enableSwitch#configure TerminalSwitch (config) #interface F0/1Switch (
-11.binBut Cisco low-endSwitchRomm Mode (Cisco Low-endSwitchRomm mode prompt for switch:) No Confreg command, what to do? Without this command does not mean that it can not modify the serial port rate, using the following command: (note case)Switch:set BAUD 115200Switch:reset (restart)This is changed, but the Romm mode of the low-end
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
Rongxi
I will talk about two tips, one about monitoring switch port traffic and the other about store value.
1. Monitor switch port traffic
Switch monitoring document in the production environment on the Internet. Therefore, it is complete, and a key knowledge is interspersed in the middle. Zabbix is still innocent .!!! In this demonstration, I used the production envir
domain name (a VTP domain name). vswitches in the same management domain can learn VTP information from each other through the VTP protocol.Cat5001> (enable) sho vtp domainDomain Name Domain Index VTP Version Local Mode------------------------------------------------------------------1 1 serverAdvt Interval Vlan-count Max-vlan-storage Config Revision SNMP Traps-----------------------------------------------------------------300 5 256 0 disabledLast U
One outlet had poor contact. Because there was no wiring module, I just fixed the wiring block and the network was ready for use. After a week, the network was broken again and I asked another colleague to change the wiring module, as a result, my colleague told me that changing the wiring module would not work, and the network would still be disconnected. I thought it was strange. I told him that the Network was originally accessible, but the wiring module was not good.
I will remove the wiring
, the first file is not the correct iOS file, the second is the correct iOS file. It's a lot easier.
Set the startup mode to 2 with the Confreg command, and then manually boot from the correct iOS:
Rommon 2 >boot Bootflash:cat4000-is-mz.121-11b.ew
Rommon reg:0x30004180
Running diags ...
...
When the boot is finished, enter the iOS interface and modify the startup parameters:
Switch>enable
Switch#dir
to say, after you set the password for level 1, you will be asked to enter the password next time you connect to the switch and enter K, this password is the password set for level 1. Level 15 is the privileged mode password that you enter after you enter the enable command.
Step 2: Set the VLAN name. Because the four VLANs belong to different switches, the command for VLAN naming is VLAN 'vlan No. 'name' vlan name ', the following code configures VL
Simply record that a Cisco router is simulated as a frame relay switch, and the router must have a serial interface module. Liehuo.net
// Enable Frame Relay switching on the vroFRSW (config) # frame-relay switching strong-fire-network
// Enter the Interface Configuration ModeFRSW (config) # int serial 0/1
Veryhuo.co
Whether it's on a Cisco router or a network device such as a Cisco switch, the standard ACL access control list is always unable to match both the traffic source address and the destination address, nor does it meet the requirements of the "granular" control of the current network world, such as: A service function that allows access to a server, However, pinging
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