:
Switch>
Switch> enable
Switch # conf t
Switch (config) # host 3550
3550 (config )#No ip dolo #This statement may indicate that the statement fails, but does not affect the subsequent results. You can omit it.
Cisco 3550 switch stp learning notes STP (Spanning Tree Protocol) (IEEE 802.1D) Spanning Tree Protocol-review the working principles of SW: 1. the frame it forwards cannot be modified. create a MAC-PORT ing table based on source MAC learning. forward the frames in the target MAC ing table directly from the corresponding port. for frames without target MAC ing/Tar
192.168.3.0, The subnet mask is 255.255.255.0, And the Gateway: 192.168.3.1 is named work01, vlan4 is the network of client 2, work02, IP address segment is 192.168.4.0, subnet mask: 255.255.255.0, Gateway: 192.168.4.1.
3550 Ports 1-8 are allocated to VLAN 2, ports 9-16 are divided into VLAN 3, and ports 17-24 are allocated to VLAN 4.
To configure DHCP for a CISCO
Network Environment: A 3550EMI switch is divided into three VLANs. vlan2 is the network where the server is located and is named server. The IP address segment t-[/[Xm1S3 is 192.168.2.0, subnet mask: 255.255.255.0, Gateway: 192.168.2.1 the Domain Server is windows 2000 advanceserver and serves as a DNS server. The IP address is 192.168.2.10, vlan3 is the network where client 1 is located, the IP address segment is 192.168.3.0, The subnet mask is 255.2
#十二步 Save ConfigurationDestination filename [startup-config]?Building configuration ...[OK]switch#-=--------Switch#reload#重新启动-----------Press RETURN to get started!00:00:14:%spantree-5-extended_sysid:extended sysid enabled for type VLAN00:00:17:%sys-5-config_i:configured from memory by console00:00:17:%sys-5-restart:system restarted--Cisco Internetwork Operating
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
For complete syntax and application information about this chapter, seeCatalyst 3550 Multilayer Switch Command ReferenceAnd Cisco IOS Interface Command Reference For Release 12.1.
Understanding Interface Types
This section describes different interface types and some reference content for configuring these interfaces in detail in other sections. Other section
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
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
[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
interface that will be configured as a three-tier interface
Step 3
No Switchport
To get the physical interface into layer three mode
Step 4
IP address ip_address subnet_mask
Configure IP addresses and subnet masks
Step 5
No shutdown
Step 6
End
Return Privileged Mode
Step 7
show interfaces [Interface-id]show IP inter
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
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 f
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
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
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