cisco layer 2 switch models

enterprises hope to deploy a high-intelligence, high-availability, and high-reliability storage network (SAN) on the basis of cost control ), or, if you want to extend your SAN infrastructure from an entry-level network to enterprise-level deployment, try to protect your SAN infrastructure investment. Cisco's upcoming CiscoMDS9100 series of multi-layer smart Optical Fiber switches will make customers' wishes a reality.

cannot connect the LAN to the WAN or the Internet, because the routing protocols supported by layer-3 switches are very limited. After all, this is not its main function. We know that on the LAN, a layer-2 switch identifies the packet sender through the source MAC address and forwards the packet according to the desti

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 application is not flexible -You need to view the r

Branch switches.The Cisco switch can support any media as a trunk line. To achieve relay, you can use its unique isl tag. Isl (inter-switch link) is a protocol for transmitting vlan information and vlan data streams between switches, between switches and routers, and between switches and servers, by configuring isl encapsulation on the port directly connected to

, adding switches and end devices1, double-click switch into switch command line (CLI) mode, switch configuration mode by command2 in most cases for security reasons, you need to configure the switch privileged mode passwordValidation test3 Configuring the telnet login switchTo achieve remote login, first need to confi

Three-layer switch compared to routers in a large LAN, this function is perfect, to master the three-layer switch is very helpful, but now some manufacturers of switches can also directly connect the Internet to provide router capabilities. Comparison of three-layer

[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 Switch VLAN routing so that VLAN10 and VLAN20 members can access each other.

) set Spantree Fwddelay delay_# [vlan_#] Sets the time interval from the listening state to the learning state to the forwarding state (default 15 seconds, the value range is 4-30 seconds)4000> (enable) set Spantree Hello Interval_time [vlan_#] Sets the time interval for the root node switch to send BPDUs (default 2 seconds, the value range is 1-10 seconds)4000> (enable) set Spantree maxage agingtime [vlan_

, R-rip, M-mobile, B-BGPD-EIGRP, Ex-eigrp External, O-OSPF, IA-OSPF Inter areaN1-OSPF NSSA External Type 1, N2-OSPF NSSA Externaltype 2E1-OSPF external Type 1, E2-OSPF external type 2, E-EGPI-is-is, L1-is-is level-1, L2-is-is level-2, ia-is-is Inter area*-Candidate default, U-per-user static route, O-ODRP-periodic downloaded static routeGateway of last resort are not setO E2 192.168.10.0/24 [110/20] via 192

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

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

R1 configuration:router>enRouter#conf TR1 (config) #int f0/0R1 (config-if) #ip add 192.168.10.2 255.255.255.0R1 (config-if) #no shR1 (config-if) #int F0/1R1 (config-if) #ip add 192.168.20.254 255.255.255.0R1 (config-if) #no shSW1 configuration:switch>enSwitch#conf TSwitch (config) #hostname SW1SW1 (config) #lin vty 0 15SW1 (config-line) #password CCNASW1 (Config-line) #loginSW1 (Config-line) #exitSW1 (config) #enable password 123456SW1 (config) #int vlan 1SW1 (config-if) #ip add 192.168.20.1 255

-if) # channel-group 1 mode desirable Switch (config-if) # end Appendix: Switch (config-if) # channel-group port_channel_number mode {auto | desirable | on} // Add the physical port to an Ethernet channel and determine the PagP mode. 3) layer-2 Ethernet Channel Configuration

describe how to combine and deploy the above technologies on CISCO switches for typical Layer 2 attacks and spoofing, to prevent man-in-the-middle attacks, MAC/CAM attacks, DHCP attacks, and address spoofing in the exchange environment, more importantly, address management can be simplified through the deployment of the above technologies, track user IP addresse

the above technologies on CISCO switches to address typical Layer 2 attacks and spoofing, to prevent man-in-the-middle attacks, MAC/CAM attacks, DHCP attacks, and address spoofing in the exchange environment, more importantly, address management can be simplified through the deployment of the above technologies, track user IP addresses and corresponding