Cisco 2950 - Catalyst Switch Configuration Manual

Text of Cisco 2950 - Catalyst Switch User Guide:

• Cisco 2950 - Catalyst Switch, xxxi Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Preface Related Publications Related Publications These documents provide complete information about the switch and are available from this Cisco.com site: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/index.htm You can order printed copies of documents with a DOC-xxxxxx= number from the Cisco.com sites and from the telephone numbers listed in the “Obtaining Documentation” section on page xxxi. • Release Notes for the Catalyst 2950 and Catalyst 2955 Switches (not orderable but is available on Cisco.com) Note Switch requirements and proce

• Cisco 2950 - Catalyst Switch, 23-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 23 Configuring UDLD Understanding UDLD A unidirectional link occurs whenever traffic sent by a local device is received by its neighbor but traffic from the neighbor is not received by the local device. In normal mode, UDLD detects a unidirectional link when fiber strands in a fiber-optic interface are misconnected and the Layer 1 mechanisms do not detect this misconnection. If the interfaces are connected correctly but the traffic is one way, UDLD does not detect the unidirectional link because the Layer 1 mechanism, which is supposed to detect this condition, does no

• Cisco 2950 - Catalyst Switch, 22-3 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 22 Configuring Port-Based Traffic Control Configuring Storm Control The output from the show storm-control privileged EXEC command shows the upper, lower, and current thresholds as a percentage of the total bandwidth or the packets per second, depending on the configuration. Step 3 storm-control {broadcast | multicast | unicast} level {level [level-low] | pps pps pps-low} Configure broadcast, multicast, or unicast storm control. For level, specify the rising threshold level for broadcas

• Cisco 2950 - Catalyst Switch, Contents iv Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 CHAPTER 2 Using the Command-Line Interface 2-1 Cisco IOS Command Modes 2-1 Getting Help 2-3 Abbreviating Commands 2-4 Using no and default Forms of Commands 2-4 Understanding CLI Messages 2-5 Using Command History 2-5 Changing the Command History Buffer Size 2-5 Recalling Commands 2-6 Disabling the Command History Feature 2-6 Using Editing Features 2-6 Enabling and Disabling Editing Features 2-6 Editing Commands through Keystrokes 2-7 Editing Command Lines that W

• Cisco 2950 - Catalyst Switch, 13-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter13 Configuring LRE Understanding LRE Features Connecting a switch LRE port to a remote Ethernet device (such as a PC) requires two types of connections: • LRE link—This is the connection between the switch LRE port and the RJ-11 wall port on an LRE CPE device such as the Cisco 575 LRE CPE or the Cisco 585 LRE CPE. This connection can be through categorized or noncategorized unshielded twisted-pair cable and can

• CHAPTER 17-1 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 17 Configuring VLANs This chapter describes how to configure normal-range VLANs (VLAN IDs 1 to 1005) and extended-range VLANs (VLAN IDs 1006 to 4094) on your Catalyst 2950 or Catalyst 2955 switch. It includes information about VLAN modes and the VLAN Membership Policy Server (VMPS). Note

• Cisco 2950 - Catalyst Switch, 29-9 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 29 Configuring Network Security with ACLs Configuring ACLs Creating a Numbered Standard ACL Note For information about creating ACLs to apply to a management interface, refer to the “Configuring IP Services” section of the Cisco IOS IP and IP Routing Configuration Guide, Cisco IOS Release 12.1 and the Cisco IOS IP and IP Routing Command Reference, Cisco IOS Release 12.1. You can these apply these ACLs only to a management interface. Beginning in privileged EXEC mode, follow these steps to create a numbered standard IP ACL:

• Cisco 2950 - Catalyst Switch, 8-4 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 8 Administering the Switch Managing the System Time and Date This section contains this configuration information: • Default NTP Configuration, page 8-4 • Configuring NTP Authentication, page 8-4 • Configuring NTP Associations, page 8-6 • Configuring NTP Broadcast Service, page 8-7 • Configuring NTP Access Restrictions, page 8-8 • Configuring the Source IP Address for NTP Packets, page 8-10 • Displaying the NTP Configuration, page 8-11 Default NTP Configuration Table 8-1 shows the default NTP configuration. NTP is enabled on all interfaces

• Cisco 2950 - Catalyst Switch, CHAPTER 31-1 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 31 Configuring EtherChannels This chapter describes how to configure EtherChannel on the Layer 2 interfaces of a Catalyst 2950 or Catalyst 2955 switch. EtherChannel provides fault-tolerant high-speed links between switches, routers, and servers. You can use it to increase the bandwidth between the wiring closets and the data center, and you can deploy it anywhere in the network where bottlenecks are likely to occur. EtherChannel provides automatic recovery for the loss of a link by redistributing the lo

• 32-6 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter32 Troubleshooting Using Recovery Procedures Step 9 Copy the configuration file into memory: Switch# copy flash:config.text system:running-config Source filename [config.text]? Destination filename [running-config]? Press Return in response to the confirmation prompts.

• Cisco 2950 - Catalyst Switch, 30-24 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 30 Configuring QoS Configuring Standard QoS With the trusted setting, you also can use the trusted boundary feature to prevent misuse of a high-priority queue if a user bypasses the telephone and connects the PC directly to the switch. Without trusted boundary, the CoS labels generated by the PC are trusted by the switch (because of the trusted CoS setting). By contrast, trusted boundary uses CDP to detect the presence of a Cisco IP Phone (such as

• Contents vii Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Understanding CNS Embedded Agents 6-5 Initial Configuration 6-5 Incremental (Partial) Configuration 6-6 Synchronized Configuration 6-6 Configuring CNS Embedded Agents 6-6 Enabling Automated CNS Configuration 6-6 Enabling the CNS Event Agent 6-8 Enabling the CNS Conf

• Cisco 2950 - Catalyst Switch, 11-15 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 11 Configuring Interface Characteristics Monitoring and Maintaining the Interfaces Use the no description interface configuration command to delete the description. This example shows how to add a description on a port and to verify the description: Switch# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Switch(config)# interface fastethernet0/4 Switch(config-if)# description Connects to Marketing Switch(config-if)# end Switch# show inte

• Index IN-17 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 monitoring (continued) network traffic for analysis with probe 25-1 port protection 22-13 port protection 22-13 speed and duplex mode 11-12 traffic flowing among switches 26-1 traffic suppression 22-13 VLANs 17-14 VMPS 17-30 VTP 18-16 MSTP boundary ports configuration guidel

• 22-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 22 Configuring Port-Based Traffic Control Configuring Port Security Security Violations It is a security violation when one of these situations occurs: • The maximum number of secure MAC addresses have been added to the address table, and a station whose MAC addr

• Cisco 2950 - Catalyst Switch, 13-23 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 13 Configuring LRE Upgrading LRE Switch Firmware Beginning in privileged EXEC mode, follow these steps to enable the switch to send debugging messages to the LRE message logging process and to the system message logging process: To disable the syslog export feature, use the no lre syslog global configuration command. When you enter this command, the switch sends debugging messages only to the LRE message logging process. Beginning in privileged EXEC mode, follow these steps to specify the mode in which to log LRE events: To turn off the logging of events, use the

• Cisco 2950 - Catalyst Switch, 12-7 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 12 Configuring Smartports Macros Configuring Smartports Macros You can delete a global macro-applied configuration on a switch only by entering the no version of each command that is in the macro. You can delete a macro-applied configuration on an interface by entering the default interface interface-id interface configuration command. This example shows how to display the cisco-desktop macro, how to apply the macro, and to set the access VLAN ID to 25 on an interface: Switch# show parser macro cisc

• Cisco 2950 - Catalyst Switch, 18-12 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 18 Configuring VTP Configuring VTP Note You can also configure a VTP client by using the vlan database privileged EXEC command to enter VLAN configuration mode and entering the vtp client command, similar to the second procedure under “Configuring a VTP Server” section on page 18-9. Use the no vtp client VLAN configuration command to return the switch to VTP server mode or the no vtp password VLAN configuration command to return the switch to a no-password state. When you configure a domain name, it cannot be r

• 6-12 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter6 Configuring IE2100 CNS Agents Configuring CNS Embedded Agents Enabling a Partial Configuration Beginning in privileged EXEC mode, follow these steps to enable the CNS configuration agent and to initiate a partial configuration on the switch: To disable the CNS configuration agent, use

• Cisco 2950 - Catalyst Switch, 30-34 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 30 Configuring QoS Configuring Standard QoS This example shows how to create a policy map and attach it to an ingress interface. In the configuration, the IP standard ACL permits traffic from network 10.1.0.0. For traffic matching this classification, the DSCP value in the incoming packet is trusted. If the matched traffic exceeds an average traffic rate of 5000000 bps and a normal burst size of 8192 bytes, its DSCP is marked down to a value of 10 and sent. Switch(config)# access-list 1 permit 10.1.0.0 0.0.255.255 Switch(config)# class-map ipclass1 Switch(config-cmap)# match acces

• Cisco 2950 - Catalyst Switch, 28-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 28 Configuring SNMP Configuring SNMP Step 3 snmp-server group groupname {v1 | v2c | v3 {auth | noauth | priv}} [read readview] [write writeview] [notify notifyview] [access access-list] Configure a new SNMP group on the remote device. • For groupname, specify the name of the group. • Specify a security model: – v1 is the least secure of the possible security models. – v2c is the second least secure model. It allows transmission of informs and integers twice the normal width. –

• Cisco 2950 - Catalyst Switch, 8-18 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 8 Administering the Switch Configuring a System Name and Prompt Default DNS Configuration Table 8-2 shows the default DNS configuration. Setting Up DNS Beginning in privileged EXEC mode, follow these steps to set up your switch to use the DNS: If you use the switch IP address as its hostname, the IP address is used and no DNS query occurs. If you configure a hostname that contains no periods (.), a period followed by the default do

• Cisco 2950 - Catalyst Switch, 4-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 4 Getting Started with CMS Displaying CMS Specifying an HTTP Port (Nondefault Configuration Only) If you change the HTTP port, you must include the new port number when you enter the IP address in the browser Location or Address field (for example, http://10.1.126.45:184 where 184 is the new HTTP port number). You should write down the port number to which you are connected. Use care when changing

• Cisco 2950 - Catalyst Switch, 32-14 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter32 Troubleshooting Preventing Autonegotiation Mismatches Recovering from Lost Member Connectivity Some configurations can prevent the command switch from maintaining contact with member switches. If you are unable to maintain management contact with a member, and the member switch is forwarding packets normally, check for these conflicts: • A member switch (Catalyst 3550, Catalyst 3500 XL, Catalyst 2955, Catalyst 2950, Catalyst 2940, Catalyst 2900 XL, Catalyst 2820, and Catalyst 1900) cannot

• Cisco 2950 - Catalyst Switch, 29-14 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 29 Configuring Network Security with ACLs Configuring ACLs Beginning in privileged EXEC mode, follow these steps to create a standard named access list using names: Beginning in privileged EXEC mode, follow these steps to create an extended named ACL using names: Command Purpose Step 1 configure terminal Enter global configuration mode. Step 2 ip access-list standard {name | access-list-number} Define a standard IP access list by using a name, and enter access-list configuration

• Cisco 2950 - Catalyst Switch, Contents xxi Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 CHAPTER 25 Configuring SPAN and RSPAN 25-1 Understanding SPAN and RSPAN 25-1 SPAN and RSPAN Concepts and Terminology 25-3 SPAN Session 25-3 Traffic Types 25-3 Source Port 25-4 Destination Port 25-4 Reflector Port 25-5 SPAN Traffic 25-5 SPAN and RSPAN Interaction with Other Features 25-5 SPAN and RSPAN Session Limits 25-6 Default SPAN and RSPAN Configuration 25-7 Configuring SPAN 25-7 SPAN Configuration Guidelines 25-7 Creating a SPAN Session and Specifying Ports to Monitor 25-8 Creating a SPAN Session and Enabling Ingress Traffic 25-9 Removing Ports from a SPAN

• Cisco 2950 - Catalyst Switch, 10-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 10 Configuring 802.1x Port-Based Authentication Understanding 802.1x Port-Based Authentication • If an 802.1x port is authenticated and put in the RADIUS server assigned VLAN, any change to the port access VLAN configuration does not take effect. • The 802.1x with VLAN assignment feature is not supported on trunk ports, dynamic ports, or with dynamic-access port assignment through a VLAN Membership Policy Server (VMPS). To configure VLAN assignment you need to perform these tasks: • Enable AAA authorization. • Enable 802.1x (the

• Cisco 2950 - Catalyst Switch, 14-7 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Chapter 14 Configuring STP Understanding Spanning-Tree Features Disabled State A Layer 2 interface in the disabled state does not participate in frame forwarding or in the spanning tree. An interface in the disabled state is nonoperational. A disabled interface performs as follows: • Discards frames received on the port • Discards frames switched from another interface for forwarding • Does not learn addr

More Instructions:

	Cisco 2950 - Catalyst Switch Hardware installation manual 24-03-2023 134	DOWNLOAD
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