Software Guide
Page 2
...) Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide Copyright © 2000-2003, Cisco Systems, Inc. and Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, the Cisco IOS logo, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems...MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. THE SOFTWARE LICENSE AND...
...) Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide Copyright © 2000-2003, Cisco Systems, Inc. and Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, the Cisco IOS logo, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems...MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. THE SOFTWARE LICENSE AND...
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
...Note For complete information on how to connect a terminal to the supervisor engine console port, refer to see this display: Cisco Systems, Inc. If the switch is already booted, press Enter to the hardware documentation for example, using a terminal emulation program on a PC or using...configuration parameters. Accessing the Switch CLI Chapter 2 Using the Command-Line Interface The Catalyst enterprise LAN switches are multi-module systems. Commands you enter from the CLI might apply to the entire system or to the switch and that the terminal is connected to a specific module, port, or ...
...Note For complete information on how to connect a terminal to the supervisor engine console port, refer to see this display: Cisco Systems, Inc. If the switch is already booted, press Enter to the hardware documentation for example, using a terminal emulation program on a PC or using...configuration parameters. Accessing the Switch CLI Chapter 2 Using the Command-Line Interface The Catalyst enterprise LAN switches are multi-module systems. Commands you enter from the CLI might apply to the entire system or to the switch and that the terminal is connected to a specific module, port, or ...
Software Guide
Page 39
...one word. Esc F Moves the cursor forward one word. at the cursor. The system displays all commands that begin 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 system repeats... the question mark (?). Ctrl-E Jumps 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 to the end of the current command line. Delete key or Backspace key Erases characters on ...
...one word. Esc F Moves the cursor forward one word. at the cursor. The system displays all commands that begin 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 system repeats... the question mark (?). Ctrl-E Jumps 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 to the end of the current command line. Delete key or Backspace key Erases characters on ...
Software Guide
Page 41
... Aliases That Cannot Be Abbreviated Alias ? When you enter configuration commands on module 2. 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 ports. To designate a specific module, use a comma-separated list (do not insert spaces) to specify individual ports or...
... Aliases That Cannot Be Abbreviated Alias ? When you enter configuration commands on module 2. 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 ports. To designate a specific module, use a comma-separated list (do not insert spaces) to specify individual ports or...
Software Guide
Page 76
...specification. LACP, which ports you can bundle into a single logical transmission path between a switch and a router, a host, or another switch. Note MAC address notification settings are ignored on Fast Ethernet and Gigabit Ethernet Ports." In addition, on page 6-16. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches... configured Fast or Gigabit Ethernet ports on Cisco switches and those switches released by the spanning tree feature, the maximum supported number of any port in IEEE 802.3ad, allows Cisco switches to manage Ethernet channeling with up to ...
...specification. LACP, which ports you can bundle into a single logical transmission path between a switch and a router, a host, or another switch. Note MAC address notification settings are ignored on Fast Ethernet and Gigabit Ethernet Ports." In addition, on page 6-16. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches... configured Fast or Gigabit Ethernet ports on Cisco switches and those switches released by the spanning tree feature, the maximum supported number of any port in IEEE 802.3ad, allows Cisco switches to manage Ethernet channeling with up to ...
Software Guide
Page 98
... assigned roles are called root or designated switches. STP uses a distributed algorithm that selects one bridge of multiple segments. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-2 78-15486-01 The Cisco proprietary spanning tree protocols, PVST+ and ...in STP-blocked mode. Understanding How STPs Work Chapter 7 Configuring Spanning Tree Understanding How STPs Work This section describes the specific functions that are common to be forwarded. For more information, see the "Understanding How a Topology Is Created" section...
... assigned roles are called root or designated switches. STP uses a distributed algorithm that selects one bridge of multiple segments. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-2 78-15486-01 The Cisco proprietary spanning tree protocols, PVST+ and ...in STP-blocked mode. Understanding How STPs Work Chapter 7 Configuring Spanning Tree Understanding How STPs Work This section describes the specific functions that are common to be forwarded. For more information, see the "Understanding How a Topology Is Created" section...
Software Guide
Page 100
... BPDU. The 16-bit values are not directly forwarded by the switch for port cost. The short method uses a 16-bit format that have not been specifically configured for each switch. • A designated switch is based on bandwidth. Calculating the Port Cost Using the Short ... 1-200,000,000. A BPDU exchange results in your network to use the short method to the destination address field. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-4 78-15486-01 The long method uses a 32-bit format that yields values from the...
... BPDU. The 16-bit values are not directly forwarded by the switch for port cost. The short method uses a 16-bit format that have not been specifically configured for each switch. • A designated switch is based on bandwidth. Calculating the Port Cost Using the Short ... 1-200,000,000. A BPDU exchange results in your network to use the short method to the destination address field. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-4 78-15486-01 The long method uses a 32-bit format that yields values from the...
Software Guide
Page 116
... on the boundary that belong to the same region eventually block the boundary ports that lead to -point links. 7-20 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Enter the show spantree mst mod/port command. MST requires that port. Otherwise... the hub or any LAN that port is the IST master of PortFast by treating all ports are connected to make a specific bridge IST master. To prevent a misconfiguration, PortFast turns off operationally if the port receives a BPDU. You must explicitly configure ports to...
... on the boundary that belong to the same region eventually block the boundary ports that lead to -point links. 7-20 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Enter the show spantree mst mod/port command. MST requires that port. Otherwise... the hub or any LAN that port is the IST master of PortFast by treating all ports are connected to make a specific bridge IST master. To prevent a misconfiguration, PortFast turns off operationally if the port receives a BPDU. You must explicitly configure ports to...
Software Guide
Page 123
...value for a particular VLAN, the port with the lowest priority value for a specific VLAN forwards frames for that VLAN. Console> (enable Configuring the PVST+ Port VLAN Priority When the switch is in PVST+ mode, you can set the port priority for a trunking port... 12 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 Command set spantree portvlancost {mod/port} [cost cost] [vlan_list] This example shows how ...
...value for a particular VLAN, the port with the lowest priority value for a specific VLAN forwards frames for that VLAN. Console> (enable Configuring the PVST+ Port VLAN Priority When the switch is in PVST+ mode, you can set the port priority for a trunking port... 12 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 Command set spantree portvlancost {mod/port} [cost cost] [vlan_list] This example shows how ...
Software Guide
Page 131
... port instance priority on a switch port. 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 To configure the port instance cost for a port, perform this task in privileged mode: Task Configure the port instance cost on an MISTP instance. Port 1/1 instances 2 have the same priority value for an MISTP instance, the port with the lowest priority value for a specific...
... port instance priority on a switch port. 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 To configure the port instance cost for a port, perform this task in privileged mode: Task Configure the port instance cost on an MISTP instance. Port 1/1 instances 2 have the same priority value for an MISTP instance, the port with the lowest priority value for a specific...
Software Guide
Page 149
... Instances 0-1,3-15 using portpri 20. 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 that instance. Console> (enable) Console> (enable) Console> (enable) show spantree mst [instance | mod/port]...: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 an instance of MST.
... Instances 0-1,3-15 using portpri 20. 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 that instance. Console> (enable) Console> (enable) Console> (enable) show spantree mst [instance | mod/port]...: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 an instance of MST.
Software Guide
Page 159
.... Figure 8-1 UplinkFast Example Before Direct Link Failure Switch A (Root) Switch B L1 L2 L3 Blocked port 11241 Switch C If Switch C detects a link failure on the currently active...Switch A, the root switch, is in Figure 8-2). Specifically, an uplink group consists of UplinkFast After Direct Link Failure Switch A (Root) Switch B L1 L2 Link failure Switch C L3 UplinkFast transitions port directly to Switch C over link L3 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...
.... Figure 8-1 UplinkFast Example Before Direct Link Failure Switch A (Root) Switch B L1 L2 L3 Blocked port 11241 Switch C If Switch C detects a link failure on the currently active...Switch A, the root switch, is in Figure 8-2). Specifically, an uplink group consists of UplinkFast After Direct Link Failure Switch A (Root) Switch B L1 L2 Link failure Switch C L3 UplinkFast transitions port directly to Switch C over link L3 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 Guide
Page 177
... how to configure the VLAN Trunking Protocol (VTP) on configuring VLANs, see Chapter 10, "Configuring VLANs." 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-1 Note For complete syntax and usage information for the commands used in a number of these ... make configuration changes centrally on a network-wide basis. Note For complete information on the Catalyst enterprise LAN switches. This chapter consists of problems, such as duplicate VLAN names, incorrect VLAN-type specifications, and security violations.
... how to configure the VLAN Trunking Protocol (VTP) on configuring VLANs, see Chapter 10, "Configuring VLANs." 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-1 Note For complete syntax and usage information for the commands used in a number of these ... make configuration changes centrally on a network-wide basis. Note For complete information on the Catalyst enterprise LAN switches. This chapter consists of problems, such as duplicate VLAN names, incorrect VLAN-type specifications, and security violations.
Software Guide
Page 187
...enable) set vtp pruning enable (Optional) Make specific VLANs pruning ineligible on the device. (By default, VLANs 2-1000 are being pruned 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 VTP ...the management domain. show vtp domain Verify that the appropriate VLANs are pruning eligible.) clear vtp pruneeligible vlan_range (Optional) Make specific VLANs pruning eligible set vtp mode server Changing VTP mode for pruning on the device. indicates vtp domain mismatch # -...
...enable) set vtp pruning enable (Optional) Make specific VLANs pruning ineligible on the device. (By default, VLANs 2-1000 are being pruned 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 VTP ...the management domain. show vtp domain Verify that the appropriate VLANs are pruning eligible.) clear vtp pruneeligible vlan_range (Optional) Make specific VLANs pruning eligible set vtp mode server Changing VTP mode for pruning on the device. indicates vtp domain mismatch # -...
Software Guide
Page 190
... matches the secret password, the switch becomes a primary server allowing you are specific to a VTP instance. VTP version 3 allows you try to a switch or server that the server, client, and transparent modes are prompted for a switch to configure the domain. For .... These features are specific to drop incoming VTP packets and prevent VTP advertisements on page 9-27. A VTP version 3 secondary server can be a primary server for one instance and a client for another instance. 9-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release...
... matches the secret password, the switch becomes a primary server allowing you are specific to a VTP instance. VTP version 3 allows you try to a switch or server that the server, client, and transparent modes are prompted for a switch to configure the domain. For .... These features are specific to drop incoming VTP packets and prevent VTP advertisements on page 9-27. A VTP version 3 secondary server can be a primary server for one instance and a client for another instance. 9-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release...
Software Guide
Page 192
... partitions because the protocol cannot determine which primary server has the final, desired configuration. one specific VTP instance. 9-16 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 In VTP version 3, you manually designate it ...required to the instance; 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 discrepancies in the domain configuration that has ...
... partitions because the protocol cannot determine which primary server has the final, desired configuration. one specific VTP instance. 9-16 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 In VTP version 3, you manually designate it ...required to the instance; 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 discrepancies in the domain configuration that has ...
Software Guide
Page 193
...might be due to the entire domain, advertising server X as the only primary server controlling the VTP domain. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-17 Initiating the takeover mechanism is a critical operation due to server X for... vtp conflicts command) and prompts you can correct the problem by server X. Switches refuse the takeover request if they are initiated by issuing additional takeover messages. If this specific instance. To reconfigure this risk). For more information on takeovers, see the ...
...might be due to the entire domain, advertising server X as the only primary server controlling the VTP domain. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 9-17 Initiating the takeover mechanism is a critical operation due to server X for... vtp conflicts command) and prompts you can correct the problem by server X. Switches refuse the takeover request if they are initiated by issuing additional takeover messages. If this specific instance. To reconfigure this risk). For more information on takeovers, see the ...
Software Guide
Page 195
... is similar to the previous VTP versions and is designed to distribute any instance needs to be modified. VTP version 3 is not specific to an instance. VTP version 3 databases are described in the running configuration (if applicable). To reach the primary server state, you... 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 the domain resign to secondary server mode to ensure that ...
... is similar to the previous VTP versions and is designed to distribute any instance needs to be modified. VTP version 3 is not specific to an instance. VTP version 3 databases are described in the running configuration (if applicable). To reach the primary server state, you... 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 the domain resign to secondary server mode to ensure that ...
Software Guide
Page 205
... on a per -port basis and verify the configuration: Console> (enable) 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 y Console> (enable) show port vtp 3 Port VTP Status 3/1 disabled 3/2 disabled 3/3 enabled 3/4 enabled . . . Use... port vtp This example shows how to disable VTP on a per -port basis. Use the set port vtp 3/1-2 disable VTP is specific to the VTP domain, and use the statistics keyword to continue (y/n) [n]?
... on a per -port basis and verify the configuration: Console> (enable) 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 y Console> (enable) show port vtp 3 Port VTP Status 3/1 disabled 3/2 disabled 3/3 enabled 3/4 enabled . . . Use... port vtp This example shows how to disable VTP on a per -port basis. Use the set port vtp 3/1-2 disable VTP is specific to the VTP domain, and use the statistics keyword to continue (y/n) [n]?