c3550

3550A # sh runBuilding configuration...Current configuration: 2876 bytes!Version 12.1:No service padService timestamps debug uptimeService timestamps log uptimeNo service password-encryption!Hostname 3550A!Enable secret level 1 5 $1 $ zNAA $ o7rtmXV/

A number of people asked how to configure 3550 as a DHCP server, because at that time, when configuring 3550 as a DHCP relay agent by the way to test A to configure 3550 as a DHCP server and passed, so here the configuration process is written out

Lab requirements: The topology is simulated based on the typical C3550-Headquarters-branch structure. The core route of the headquarters is C3550. The Extranet network uses the OSPF protocol and the Intranet is deployed through the VTP protocol to achieve network-wide interconnection.1, the headquarters core switch C3550-1 to create VLAN10/20/30/40, of which VLAN

, right-click and select "Get". "1: sysDescr.0 (octet string) will appear on the right of the interface) cisco Internetwork Operating System Software IOS (tm) C3550 Software (C3550-I5Q3L2-M), Version 12.1 (14) EA1a, release software (fc1) Copyright (c) 1986-2003 by cisco Systems, Inc. compiled Tue 02-Sep-03 by country ino ", 2 shows 　　 Figure 2 Then you can enter the Sniffer program and click "capture"-"Sto

address 000d. 5621. afd6 Unicast Entries Vlan mac address type protocols port ------- + --------------- + -------- + --------------------- + -------------------- 20 000d. 5621. afd6 dynamic ip, ipx GigabitEthernet3/2 The result shows that this is a gigabit port connection. Let's look at our neighbors (this is the second-level cascade switch of the core switch machine) # Sh cdp neighbors BJ-SW-419-1-4 Capability Codes: R-Router, T-Trans Bridge, B-Source Route Bridge S-Switch, H-Host, I-IGMP, r-R

-table dynamic address 000d. 5621. afd6 Unicast Entries Vlan mac address type protocols port ------- + --------------- + -------- + --------------------- + -------------------- 20 000d. 5621. afd6 dynamic ip, ipx GigabitEthernet3/2 The result shows that this is a gigabit port connection. Let's look at our neighbors (this is the second-level cascade switch of the core switch machine) # Sh cdp neighbors BJ-SW-419-1-4 Capability Codes: R-Router, T-Trans Bridge, B-Source Route Bridge S-Switch, H-Hos

.afd6 ARPA Vlan202. Locating the connected switch Port-Next, we need to know which switching machine his machine is receiving.Bj-sw#show mac-address-table Dynamic Address 000d.5621.afd6Unicast EntriesVLAN MAC address type protocols port-------+---------------+--------+---------------------+--------------------000D.5621.AFD6 Dynamic IP,IPX GIGABITETHERNET3/2From the result it is connected via a gigabit port. Let's look at the neighbor (this is the two cascade switch of the core switching machine)

Case study-network performance reduction caused by attacksFault description The manager of donghuantuo Mining Network reported that many users in the region had access to the Intranet of the group company or the Internet was slow or inaccessible. The linnancang mining report said that the Headquarters network was faulty.This report is used to check related networks and has the following features:First, the CPU load of C7609 is as high as 99%. ping donghuantuo from the Headquarters and the

.122-25.seb4.bin Tftp://192.168.1.100/ C3560-ipbase-mz.122-25.seb4.bin2.Switch#archive tar/create Tftp://192.168.1.100/c3560-ipbase-mz.122-25.seb4.tar flash:/c3560-ipbase-mz.122-25.SEB4Third, upload new iOSSwitch#copy Tftp://192.168.1.100/c3560-advipservicesk9-mz.122-25.see2.bin flash:/ C3560-advipservicesk9-mz.122-25.see2.binIv. Changing the startup settings1. Enable the switch to boot with the new iOSSwitch (config) #boot system Flash:/c3560-advipservicesk9-mz.122-25.see2.bin2. Set up an alter

room.The middle of the backbone cisco ws-c3550-48 is a cisco backbone switch, which is attached to the small switches and routes of each department. the backbone switch is connected to an ids intrusion detection system, which is a 10 m leased line connected to the office section below.There are two 8 m adsl access on the top left, and they are connected to their email server through the firewall and dmz. The email server also has an email backup sub-

Sensor settings in the OSSIM System The setting of Sensor is particularly important. The specific setting method is similar to that of the sniffer. Many people have installed the sniffer. In large networks, this method is not as simple as accessing the network. As a network administrator, you should be clear about the specific circumstances of the managed network environment. 2-2 shows the network topology of an enterprise.Figure 2-2 how to select the position of the snifferNext we will mainly

directly change the domain configuration of the H3C switch that enables the digest listening function and its connected CISCO switch. The Digest listening function must be enabled before the change. 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 rec

routeTool C2500 Cisco 25xx, 3xxx, 5100, and AO series routes(Cisco IOS 11.2 or later) C25fx Cisco 2500 fixed configuration FRAD C2600 Cisco 2600 series routeTool C2800 Catalyst 2800 series switches C2900 Catalyst 2900XL series switches C2950 Catalyst 2950 series switches C29atm Catalyst 2900 ATM Switch C3500 Catalyst 3500xl series switches C3550

mirroring, but with varying levels of support. Support SPAN of equipment:Tp-link Common mirror-capable switches have Tplink sf2005 5 Port Mirror SwitchTp-link 2428WEB Port-managed mirror SwitchCisco ws-c6509 , ws-c4006 , ws-c3750g-24t-e , Ws-c3550-48emi , Ws-c2950g-24-ei Huawei s2008/s2016/s2026/s2403h/s3026 Port mirroring is supported . 650) this.width=650; "title=" 8-21-2.jpg "alt=" wkiol1xwyqpa2r4laafg0-d0cuk917.jpg "src=" http://s3.51cto.com/wyfs

Lab Environment:Routers make Tp-link set up NAT forwarding, Tp-link router gateway is set to 192.168.30.254 ( core layer) Cisco 35,503 layer switch (model C3550-I5Q3L2-M) configuration three Vlan,vlan 10, VLAN 20, and VLAN 30IP address for VLAN 10:192.168.10.1/24IP address for VLAN 20:192.168.20.1/24FA0/24 ports are configured as trunk port-level converged layer Cisco 2960 switch FA0/24 ports through VLAN 10 and VLAN 20IP address for VLAN 30:192.168.