Software Guide
Page 2
...OF SUCH DAMAGES. and certain other company. (0304R) Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide Copyright © 2000-2003, Cisco Systems, Inc. The use of Cisco Systems, Inc.; The Cisco implementation of TCP header compression is an adaptation of a...public domain version of California. CCIP, CCSP, the Cisco Arrow logo, the Cisco Powered Network mark, Cisco Unity, Follow Me Browsing, FormShare, and StackWise are registered trademarks of Cisco Systems, Inc.; THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE ...
...OF SUCH DAMAGES. and certain other company. (0304R) Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide Copyright © 2000-2003, Cisco Systems, Inc. The use of Cisco Systems, Inc.; The Cisco implementation of TCP header compression is an adaptation of a...public domain version of California. CCIP, CCSP, the Cisco Arrow logo, the Cisco Powered Network mark, Cisco Unity, Follow Me Browsing, FormShare, and StackWise are registered trademarks of Cisco Systems, Inc.; THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE ...
Software Guide
Page 17
...or Disabling the "Cisco Systems Console" Telnet Login Banner 27-5 Defining and Using Command Aliases 27-6 Defining and Using IP Aliases 27-7 Configuring Permanent and Static ARP Entries 27-8 Configuring Static Routes 27-9 Scheduling a System Reset 27-10 Scheduling a Reset at a Specific Time 27-10... Scheduling a Reset Within a Specified Amount of Time 27-11 Generating System Status Reports for Tech Support 27-12 Power Management 28-1 Understanding How Power Management Works on the Catalyst 4500 Series Switches 28-1 Power Management Overview 28-2 ...
...or Disabling the "Cisco Systems Console" Telnet Login Banner 27-5 Defining and Using Command Aliases 27-6 Defining and Using IP Aliases 27-7 Configuring Permanent and Static ARP Entries 27-8 Configuring Static Routes 27-9 Scheduling a System Reset 27-10 Scheduling a Reset at a Specific Time 27-10... Scheduling a Reset Within a Specified Amount of Time 27-11 Generating System Status Reports for Tech Support 27-12 Power Management 28-1 Understanding How Power Management Works on the Catalyst 4500 Series Switches 28-1 Power Management Overview 28-2 ...
Software Guide
Page 36
...should appear on page 2-9). If the switch is already booted, press Enter to see the "Example of a Catalyst 4003 Bootup Display" section on the screen (see this display: Cisco Systems, Inc. For more information, see the "Switch CLI Command Modes" section on . Use...a specific module, port, or VLAN. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 2-2 78-15486-01 Enter set and clear commands. If the switch is on page 2-3. Accessing the Switch CLI Chapter 2 Using the Command-Line Interface The Catalyst enterprise LAN switches are ...
...should appear on page 2-9). If the switch is already booted, press Enter to see the "Example of a Catalyst 4003 Bootup Display" section on the screen (see this display: Cisco Systems, Inc. For more information, see the "Switch CLI Command Modes" section on . Use...a specific module, port, or VLAN. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 2-2 78-15486-01 Enter set and clear commands. If the switch is on page 2-3. Accessing the Switch CLI Chapter 2 Using the Command-Line Interface The Catalyst enterprise LAN switches are ...
Software Guide
Page 39
...the character at the privileged prompt to display a list of commands that begin with co, as VT100s. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 2-5 Ctrl-L; Ctrl-X Deletes from the cursor to the first character of the command line. Ctrl...-Line Editing permit redirect route unreachable Console> (enable) set of characters. The system displays all commands that start with a specific set ip Set IP Permit List Set ICMP redirect enable/disable Set IP routing table entry Set ICMP unreachable messages Note The ...
...the character at the privileged prompt to display a list of commands that begin with co, as VT100s. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 2-5 Ctrl-L; Ctrl-X Deletes from the cursor to the first character of the command line. Ctrl...-Line Editing permit redirect route unreachable Console> (enable) set of characters. The system displays all commands that start with a specific set ip Set IP Permit List Set ICMP redirect enable/disable Set IP routing table entry Set ICMP unreachable messages Note The ...
Software Guide
Page 41
... is mod_num/port_num. When you enter configuration commands on these switches are not case sensitive; The Catalyst 4912G, the Catalyst 2948G, and the Catalyst 2980G switches have two logical modules. For example, 3/1 specifies module 3, port 1. To specify a range of the user-configurable ports on a specific module, the command syntax is numbered 2/1 instead of ports. Chapter 2 Using...
... is mod_num/port_num. When you enter configuration commands on these switches are not case sensitive; The Catalyst 4912G, the Catalyst 2948G, and the Catalyst 2980G switches have two logical modules. For example, 3/1 specifies module 3, port 1. To specify a range of the user-configurable ports on a specific module, the command syntax is numbered 2/1 instead of ports. Chapter 2 Using...
Software Guide
Page 76
... channels is a Cisco-proprietary protocol that conform to the 802.3ad specification. PAgP and LACP Port Aggregation Control Protocol (PAgP) and Link Aggregation Control Protocol (LACP) allow ports with similar characteristics to form a channel through dynamic negotiation with devices that can be the same speed. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
... channels is a Cisco-proprietary protocol that conform to the 802.3ad specification. PAgP and LACP Port Aggregation Control Protocol (PAgP) and Link Aggregation Control Protocol (LACP) allow ports with similar characteristics to form a channel through dynamic negotiation with devices that can be the same speed. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
Software Guide
Page 98
...they use an algorithm that calculates the best loop-free path through an exchange of a spanning tree connected active topology. The Cisco proprietary spanning tree protocols, PVST+ and MISTP, are based on the IEEE 802.1D STP. (See the "Understanding How... How STPs Work This section describes the specific functions that are placed in STP-blocked mode. When loops occur, some switches recognize stations on page 7-2. At regular intervals the switches in the active topology. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-2 78-...
...they use an algorithm that calculates the best loop-free path through an exchange of a spanning tree connected active topology. The Cisco proprietary spanning tree protocols, PVST+ and MISTP, are based on the IEEE 802.1D STP. (See the "Understanding How... How STPs Work This section describes the specific functions that are placed in STP-blocked mode. When loops occur, some switches recognize stations on page 7-2. At regular intervals the switches in the active topology. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-2 78-...
Software Guide
Page 100
... Understanding BPDUs BPDUs contain configuration information about the transmitting switch and its ports, including switch and port MAC addresses, switch priority, port priority, and port cost. BPDUs are only used for ports that have not been specifically configured for port cost. A BPDU exchange results in... the port cost of port when you use the same method for each switch is closest to communicate with and compute the spanning tree topology. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-4 78-15486-01 The long method uses ...
... Understanding BPDUs BPDUs contain configuration information about the transmitting switch and its ports, including switch and port MAC addresses, switch priority, port priority, and port cost. BPDUs are only used for ports that have not been specifically configured for port cost. A BPDU exchange results in... the port cost of port when you use the same method for each switch is closest to communicate with and compute the spanning tree topology. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-4 78-15486-01 The long method uses ...
Software Guide
Page 116
... a BPDU. Link Type You can avoid explicit configuration by treating all ports are connected to -point links. 7-20 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Understanding How MST Works Chapter 7 Configuring Spanning Tree IST Master Edge Ports...that MST region. Otherwise, the port requires twice the forward delay time to a host or router. When you need to make a specific bridge IST master. For correct operation of the protocol, you can establish rapid connectivity only on point-to the CST root. A ...
... a BPDU. Link Type You can avoid explicit configuration by treating all ports are connected to -point links. 7-20 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Understanding How MST Works Chapter 7 Configuring Spanning Tree IST Master Edge Ports...that MST region. Otherwise, the port requires twice the forward delay time to a host or router. When you need to make a specific bridge IST master. For correct operation of the protocol, you can establish rapid connectivity only on point-to the CST root. A ...
Software Guide
Page 123
.... . Port 2/3 VLANs 1-5,12 have the same priority value for a particular VLAN, the port with the lowest priority value for a specific VLAN forwards frames for that VLAN. The possible port VLAN priority range is from 0-63. Port 2/3 vlans 801,1005 using portpri 32.... set spantree portpri 2/1-48 32 set spantree portvlanpri 2/1 0 set spantree portvlancost 2/3 cost 20000 1-5,12 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-27 Chapter 7 Configuring Spanning Tree Using PVST+ To configure the port VLAN cost for ...
.... . Port 2/3 VLANs 1-5,12 have the same priority value for a particular VLAN, the port with the lowest priority value for a specific VLAN forwards frames for that VLAN. The possible port VLAN priority range is from 0-63. Port 2/3 vlans 801,1005 using portpri 32.... set spantree portpri 2/1-48 32 set spantree portvlanpri 2/1 0 set spantree portvlancost 2/3 cost 20000 1-5,12 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-27 Chapter 7 Configuring Spanning Tree Using PVST+ To configure the port VLAN cost for ...
Software Guide
Page 131
...instance cost for an instance of MISTP. Command set spantree portinstancepri {mod/port} priority [instances] 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-35 Port 1/1 instances 2 have the same priority value for an MISTP instance, the...port} [cost cost] [instances] This example shows how to trunking ports only. Ports with the lowest priority value for a specific MISTP instance forwards frames for port instance cost is from 1-268435456. Console> (enable) Configuring the MISTP Port Instance Priority You can...
...instance cost for an instance of MISTP. Command set spantree portinstancepri {mod/port} priority [instances] 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-35 Port 1/1 instances 2 have the same priority value for an MISTP instance, the...port} [cost cost] [instances] This example shows how to trunking ports only. Ports with the lowest priority value for a specific MISTP instance forwards frames for port instance cost is from 1-268435456. Console> (enable) Configuring the MISTP Port Instance Priority You can...
Software Guide
Page 149
...from 0-63. If all ports have the same priority for an MST instance, the port with the lowest priority for a specific MST instance forwards frames for an instance of MST. Port 6/1 MST Instances 0-1,3-15 using portpri 20. Command set spantree ...32770 (root priority:32768, sys ID ext:2) Designated Root Cost 0 Remaining Hops 20 Designated Root Port 1/0 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-53 The port with the lowest port number forwards frames for that instance. Console> (enable...
...from 0-63. If all ports have the same priority for an MST instance, the port with the lowest priority for a specific MST instance forwards frames for an instance of MST. Port 6/1 MST Instances 0-1,3-15 using portpri 20. Command set spantree ...32770 (root priority:32768, sys ID ext:2) Designated Root Cost 0 Remaining Hops 20 Designated Root Port 1/0 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-53 The port with the lowest port number forwards frames for that instance. Console> (enable...
Software Guide
Page 159
...root port (which is connected directly to Switch B over link L1 and to forwarding state 11242 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 8-3 The port on backbone or distribution layer switches. This switchover takes approximately 1 to the... fast convergence using uplink groups in case the currently forwarding link fails. Switch A, the root switch, is forwarding at any given time. Figure 8-1 shows an example UplinkFast network topology. Specifically, an uplink group consists of active VLANs.
...root port (which is connected directly to Switch B over link L1 and to forwarding state 11242 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 8-3 The port on backbone or distribution layer switches. This switchover takes approximately 1 to the... fast convergence using uplink groups in case the currently forwarding link fails. Switch A, the root switch, is forwarding at any given time. Figure 8-1 shows an example UplinkFast network topology. Specifically, an uplink group consists of active VLANs.
Software Guide
Page 177
... addition, deletion, and renaming of problems, such as duplicate VLAN names, incorrect VLAN-type specifications, and security violations. Note For complete syntax and usage information for the commands used in a number of VLANs on the Catalyst enterprise LAN switches. Configuring VTP CH A P T E R 9 This chapter describes how to configure the VLAN Trunking Protocol (VTP...
... addition, deletion, and renaming of problems, such as duplicate VLAN names, incorrect VLAN-type specifications, and security violations. Note For complete syntax and usage information for the commands used in a number of VLANs on the Catalyst enterprise LAN switches. Configuring VTP CH A P T E R 9 This chapter describes how to configure the VLAN Trunking Protocol (VTP...
Software Guide
Page 187
...-1000 Console> (enable) show vtp domain Verify that the appropriate VLANs are pruning eligible.) clear vtp pruneeligible vlan_range (Optional) Make specific VLANs pruning eligible set vtp pruneeligible vlan_range on trunk ports. indicates vtp domain mismatch # - Do you want to 99, 250-...enable) set vtp mode server Changing VTP mode for pruning on trunk 16/1 1-1005,1025-4094 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-11 Console> (enable) set vtp pruning enable This command will not be pruning-capable...
...-1000 Console> (enable) show vtp domain Verify that the appropriate VLANs are pruning eligible.) clear vtp pruneeligible vlan_range (Optional) Make specific VLANs pruning eligible set vtp pruneeligible vlan_range on trunk ports. indicates vtp domain mismatch # - Do you want to 99, 250-...enable) set vtp mode server Changing VTP mode for pruning on trunk 16/1 1-1005,1025-4094 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-11 Console> (enable) set vtp pruning enable This command will not be pruning-capable...
Software Guide
Page 190
... for one instance and a client for another instance. 9-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 VTP Version 3... Per-Port Configuration Note With software release 8.1(1), all VTP versions can be partitioned. If a trunk is unchanged (see Figure 9-3). A VTP version 3 secondary server can be configured as primary or secondary. • VTP version 3 modes (server, client, and transparent) are specific...
... for one instance and a client for another instance. 9-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 VTP Version 3... Per-Port Configuration Note With software release 8.1(1), all VTP versions can be partitioned. If a trunk is unchanged (see Figure 9-3). A VTP version 3 secondary server can be configured as primary or secondary. • VTP version 3 modes (server, client, and transparent) are specific...
Software Guide
Page 192
...partitioned. Understanding How VTP Version 3 Works Figure 9-4 VTP Version 3: Partitioned VTP Domain Domain Cisco Primary Server X Domain Cisco Primary Server Y Chapter 9 Configuring VTP 94282 Partitions exist because of a misconfigured switch. This behavior of VTP version 3 protects the domain from accepting a conflicting configuration after ... for one instance may be partitioned while another might not be resolved by VTP. one specific VTP instance. 9-16 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01
...partitioned. Understanding How VTP Version 3 Works Figure 9-4 VTP Version 3: Partitioned VTP Domain Domain Cisco Primary Server X Domain Cisco Primary Server Y Chapter 9 Configuring VTP 94282 Partitions exist because of a misconfigured switch. This behavior of VTP version 3 protects the domain from accepting a conflicting configuration after ... for one instance may be partitioned while another might not be resolved by VTP. one specific VTP instance. 9-16 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01
Software Guide
Page 193
...switches in the domain will only accept instance configuration updates that instance. For more information on takeovers, see the "Configuring a VTP Version 3 Takeover" section on other primary servers in Figure 9-5) as the new primary server for confirmation before taking over . To reconfigure this specific...; The takeover erases conflicting configurations that are initiated by issuing additional takeover messages. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-17 Chapter 9 Configuring VTP Understanding How VTP Version...
...switches in the domain will only accept instance configuration updates that instance. For more information on takeovers, see the "Configuring a VTP Version 3 Takeover" section on other primary servers in Figure 9-5) as the new primary server for confirmation before taking over . To reconfigure this specific...; The takeover erases conflicting configurations that are initiated by issuing additional takeover messages. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-17 Chapter 9 Configuring VTP Understanding How VTP Version...
Software Guide
Page 195
You only need the primary server when the VTP configuration for the feature happens through VTP whether or not the switch is specific to the instance. The off mode, the VTP messages are tied to VLAN information. In both modes, you must issue a... 3 secondary server can operate with VTP Version 1 and VTP Version 2, page 9-21 • Limitations, page 9-21 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-19 All other potential primary servers in VTP version 3 is similar to the previous VTP versions and is controlling...
You only need the primary server when the VTP configuration for the feature happens through VTP whether or not the switch is specific to the instance. The off mode, the VTP messages are tied to VLAN information. In both modes, you must issue a... 3 secondary server can operate with VTP Version 1 and VTP Version 2, page 9-21 • Limitations, page 9-21 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-19 All other potential primary servers in VTP version 3 is similar to the previous VTP versions and is controlling...
Software Guide
Page 205
Use the set port vtp mod/port {enable | disable} command to requests. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-29 To disable VTP on a per -port basis and verify the configuration: Console> (... Version 3 show Commands Use the show vtp {conflicts | devices | domain | statistics} command to nontrusted hosts. Switches in the domain with conflicting (conflicts) configurations. When a port is specific to the VTP domain, and use the statistics keyword to continue (y/n) [n]? Command set port vtp 3/1-2 disable VTP ...
Use the set port vtp mod/port {enable | disable} command to requests. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-29 To disable VTP on a per -port basis and verify the configuration: Console> (... Version 3 show Commands Use the show vtp {conflicts | devices | domain | statistics} command to nontrusted hosts. Switches in the domain with conflicting (conflicts) configurations. When a port is specific to the VTP domain, and use the statistics keyword to continue (y/n) [n]? Command set port vtp 3/1-2 disable VTP ...