Cisco 3560 switch interface traffic grabbing vbs scriptTo make it easy for you to view the traffic of the vswitch interface, the customer does not log on to the vswitch, and does not have any network management traffic statistics device. Simply write a vbs script, which is simple and usable.
On error resume next dim wshellset WshShell = WScript. createObject ("W
The Cisco layer-3 switch is another core switch developed by Cisco. It aggregates the bandwidth of the backboard of the switch that is stacked together, in this way, the total backplane
A typical LAN is to connect a core switch with a layer-3 Switch to several Branch switches (not necessarily with layer-3 switching ). We assume that the core switch name is com, and the
Layer-3 Switch for Cisco switches
Although single-arm routing solves the communication problem between different VLANs, it also has its fatal defects:
-The single arm itself is the Backbone link of the network, which is easy to form a network bottleneck.
-The sub-interface relies on physical interfaces, and the applic
[Cisco] DHCP relay, layer-3 Switch VLAN Routing PracticeThe experiment topology uses the GNS3 0.8.6 simulator to build a DHCP server using Red Hat 6.5. The experiment requires configuring a layer-3
1) layer-2 Exchange Technology
The layer-2 switching technology is relatively mature. The layer-2 switch is a data link layer device that can identify MAC locations in data packets.Address information, which is forwarded based on the MAC address, and the corresponding MAC ad
Simply put: Layer-1 switchOnly physical layer protocols are supported (one phone-controlled switch can be called ???)L2 SwitchSupports physical layer and data link layer protocols, such as Ethernet switches.L3 SwitchSupports physical
The Group was originally connected to a subsidiary using the SDH leased line of China Telecom, and now a new mobile leased line is added, which is actually a transparent link. The core switch of the group is cisco00009, and the core switch of the subsidiary is Huawei 3526, all of which are three layers. Therefore, the two cores are connected through routes.You can perform the following two steps:1. Find an
High intelligence, high availability, and high reliability are the characteristics of multi-layer intelligent optical fiber switch. Although its technology is not very mature yet, it has been recognized by people. Cisco Systems recently announced that it will launch the CiscoMDS9100 series of multi-layer smart Optical
, routers can master the topology of the whole network. Link state broadcast is another kind of information passed between routers, it can send the information to the sender of the link state and notify the other routers.
3. Three-layer switching technology
A third-tier switching device is a second layer switch with
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) i
1,Layer-3 forwardingYesRoute information is requiredThe route selection in the forwarding process determines the final egress of the message,L3 SwitchJust put thisRoute functions are integrated into the switch ChipGo.
2,Route SelectionExistExact matchAndLongest matchTwo methods.
2.1,Exact matchThat is, the destination IP address and the route address information
First, network description
The PC1 is connected to the Cisco3550 F0/1 and the rate is 100M;
CISCO3550 's G0/1 for export.
Second, the detailed configuration process
Note: This configuration: Improve the reprint of some of the incorrect configuration.
Each interface supports only one policy in each direction, and one policy can be used for multiple interfaces. Therefore, the download rate limit for all PCs should be defined in the same policy (in this case, Policy-map User-down), while the d
downstream interfaceLimit rate speed, calculated as follows:assuming that 2960 is the port, so the simple set speed limit is*15=720 Note: IP DHCP snooping limit rate needs to be set only if the DHCP snooping converged switch or core is enabled. If there is a large number of access layer switches under a core or aggregation switch, the speed limit setting needs
; (enable) Set MLS include Rp_ip_address tells the switch which IP address is correct6500> (enable) Show MLS include displays a list of IP addresses for the external routing processor6500> (enable) Set MLS flow [Destination|destination-source|full] tells the MLS switch what information to cache the candidate packets6500> (enable) Show MLS entry show third-tier cache table6500> (enable) Set MLS Agingtime agi
Layer-3 switches of Cisco devices practice communication between different VLANs.
Layer-3 switches of Cisco devices practice communication between different VLANs.
Cisco device
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