Software Guide
Page 5
... 6-6 Creating an EtherChannel 6-7 Defining an EtherChannel Administrative Group 6-7 Setting the EtherChannel Spanning Tree Port Cost 6-8 Setting the EtherChannel Spanning Tree Port VLAN Cost 6-9 Removing an EtherChannel Bundle 6-9 Displaying EtherChannel Configuration Information 6-10 Displaying EtherChannel Traffic Statistics 6-11 Displaying EtherChannel PAgP Statistics 6-12 EtherChannel Configuration Examples 6-12 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 v
... 6-6 Creating an EtherChannel 6-7 Defining an EtherChannel Administrative Group 6-7 Setting the EtherChannel Spanning Tree Port Cost 6-8 Setting the EtherChannel Spanning Tree Port VLAN Cost 6-9 Removing an EtherChannel Bundle 6-9 Displaying EtherChannel Configuration Information 6-10 Displaying EtherChannel Traffic Statistics 6-11 Displaying EtherChannel PAgP Statistics 6-12 EtherChannel Configuration Examples 6-12 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 v
Software Guide
Page 7
...+ Port VLAN Priority 7-27 Disabling the PVST+ Mode on a VLAN 7-28 Using Rapid PVST+ 7-28 Using MISTP-PVST+ or MISTP 7-30 Default MISTP Mode Configuration 7-30 Setting the MISTP-PVST+ Mode or MISTP Mode 7-31 Configuring the MISTP Bridge ID Priority 7-32...46 Mapping and Unmapping VLANs to an MST Instance 7-54 Configuring Spanning Tree BPDU Skewing 7-57 Configuring Spanning Tree PortFast, BPDU Guard, BPDU Filter, UplinkFast, BackboneFast, and Loop Guard 8-1 Understanding How PortFast Works 8-1 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 vii
...+ Port VLAN Priority 7-27 Disabling the PVST+ Mode on a VLAN 7-28 Using Rapid PVST+ 7-28 Using MISTP-PVST+ or MISTP 7-30 Default MISTP Mode Configuration 7-30 Setting the MISTP-PVST+ Mode or MISTP Mode 7-31 Configuring the MISTP Bridge ID Priority 7-32...46 Mapping and Unmapping VLANs to an MST Instance 7-54 Configuring Spanning Tree BPDU Skewing 7-57 Configuring Spanning Tree PortFast, BPDU Guard, BPDU Filter, UplinkFast, BackboneFast, and Loop Guard 8-1 Understanding How PortFast Works 8-1 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 vii
Software Guide
Page 59
... 4 Configuring Ethernet and Fast Ethernet Switching Configuring Ethernet and Fast Ethernet Ports Table 4-1 Ethernet and Fast Ethernet Default Configurations Feature Port enable state Port name Port priority Duplex mode Native VLAN Spanning tree port cost Fast EtherChannel Default Value All ports are enabled None Normal... ports Disabled on all Fast Ethernet ports (auto mode) Configuring Ethernet and Fast Ethernet Ports These sections describe how to configure Ethernet and Fast Ethernet switching ports on the Catalyst enterprise LAN switches: • Setting Ethernet and Fast Ethernet Port ...
... 4 Configuring Ethernet and Fast Ethernet Switching Configuring Ethernet and Fast Ethernet Ports Table 4-1 Ethernet and Fast Ethernet Default Configurations Feature Port enable state Port name Port priority Duplex mode Native VLAN Spanning tree port cost Fast EtherChannel Default Value All ports are enabled None Normal... ports Disabled on all Fast Ethernet ports (auto mode) Configuring Ethernet and Fast Ethernet Ports These sections describe how to configure Ethernet and Fast Ethernet switching ports on the Catalyst enterprise LAN switches: • Setting Ethernet and Fast Ethernet Port ...
Software Guide
Page 70
... transmit (Tx) Port negotiation Enabled Spanning Tree Protocol Enabled for VLAN 1 Native VLAN VLAN 1 Spanning tree port cost 4 Gigabit EtherChannel Disabled on all Gigabit Ethernet ports (auto mode) Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 5-6 78-15486-01 Default Gigabit Ethernet Configuration Chapter 5 Configuring Gigabit Ethernet Switching Figure 5-1 Example of a Server Switching Network Topology Network backbone Backbone...
... transmit (Tx) Port negotiation Enabled Spanning Tree Protocol Enabled for VLAN 1 Native VLAN VLAN 1 Spanning tree port cost 4 Gigabit EtherChannel Disabled on all Gigabit Ethernet ports (auto mode) Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 5-6 78-15486-01 Default Gigabit Ethernet Configuration Chapter 5 Configuring Gigabit Ethernet Switching Figure 5-1 Example of a Server Switching Network Topology Network backbone Backbone...
Software Guide
Page 77
...reenabled automatically when the link is in a channel get the port to join spanning tree, either set the duplex to full or set back to full duplex. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-3 To get disabled, LACP does not remove the...some EtherChannel ports are disabled automatically to avoid network loops and other side in the on mode. • You can change causes all existing EtherChannels to reset to the default channel mode for the new protocol. • Configure all ports in an EtherChannel to operate at ...
...reenabled automatically when the link is in a channel get the port to join spanning tree, either set the duplex to full or set back to full duplex. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-3 To get disabled, LACP does not remove the...some EtherChannel ports are disabled automatically to avoid network loops and other side in the on mode. • You can change causes all existing EtherChannels to reset to the default channel mode for the new protocol. • Configure all ports in an EtherChannel to operate at ...
Software Guide
Page 118
... the default spanning tree mode for every 60 seconds Using PVST+ PVST+ is skewed. Understanding How BPDU Skewing Works Chapter 7 Configuring Spanning Tree When you can map that VLAN to IST or connect the PVST+ switch to the two regions through a port and when that connection is not received on Ethernet VLANs. 7-22 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches...
... the default spanning tree mode for every 60 seconds Using PVST+ PVST+ is skewed. Understanding How BPDU Skewing Works Chapter 7 Configuring Spanning Tree When you can map that VLAN to IST or connect the PVST+ switch to the two regions through a port and when that connection is not received on Ethernet VLANs. 7-22 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches...
Software Guide
Page 120
...disabled 0 7-24 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Using PVST+ Chapter 7 Configuring Spanning Tree This example shows how to set the PVST+ bridge ID when MAC address reduction is not enabled (default): Console> (enable...) set spantree priority 30000 1 Spantree 1 bridge priority set to 32769 (bridge priority: 32768 + sys ID extension: 1) Console> (enable) show spantree 1 VLAN 1 Spanning tree mode PVST+ Spanning tree type ieee Spanning tree enabled Designated ...
...disabled 0 7-24 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Using PVST+ Chapter 7 Configuring Spanning Tree This example shows how to set the PVST+ bridge ID when MAC address reduction is not enabled (default): Console> (enable...) set spantree priority 30000 1 Spantree 1 bridge priority set to 32769 (bridge priority: 32768 + sys ID extension: 1) Console> (enable) show spantree 1 VLAN 1 Spanning tree mode PVST+ Spanning tree type ieee Spanning tree enabled Designated ...
Software Guide
Page 122
...spanning tree mode, all the ports to have the same path cost defaults. Command set spantree defaultcostmode {short | long} This example shows how to configure the default port cost mode: Console> (enable) set spantree defaultcostmode long Portcost and portvlancost set . Ports with all switches in the network must set the default port cost mode...enter the set a cost value from 1- 65535. 7-26 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 To change the default port cost mode, perform this task in PVST+ is short. You can...
...spanning tree mode, all the ports to have the same path cost defaults. Command set spantree defaultcostmode {short | long} This example shows how to configure the default port cost mode: Console> (enable) set spantree defaultcostmode long Portcost and portvlancost set . Ports with all switches in the network must set the default port cost mode...enter the set a cost value from 1- 65535. 7-26 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 To change the default port cost mode, perform this task in PVST+ is short. You can...
Software Guide
Page 125
...output displays the spanning tree mode: Console> show spantree 3/6 Port 3/6 Edge Port: No, (Configured) Default Port Guard: Default Link Type: P2P...Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-29 Chapter 7 Configuring Spanning Tree Using Rapid PVST+ This example shows how to configure Rapid PVST+: Console> (enable) set spantree mode rapid-pvst+ Spantree mode set to point-to verify the Rapid PVST+ configuration for port 3/6 Console> show spantree 1 Spanning tree mode RAPID-PVST+ Spanning tree type ieee Spanning tree...
...output displays the spanning tree mode: Console> show spantree 3/6 Port 3/6 Edge Port: No, (Configured) Default Port Guard: Default Link Type: P2P...Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-29 Chapter 7 Configuring Spanning Tree Using Rapid PVST+ This example shows how to configure Rapid PVST+: Console> (enable) set spantree mode rapid-pvst+ Spantree mode set to point-to verify the Rapid PVST+ configuration for port 3/6 Console> show spantree 1 Spanning tree mode RAPID-PVST+ Spanning tree type ieee Spanning tree...
Software Guide
Page 126
...(802.1D) Same as port priority but configurable on a per -VLAN basis in PVST+ 20 sec 7-30 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Information about the port states is mapped to build the port database for... switches in order for the new mode, and the new spanning tree mode restarts the computation of the active topology. To use MISTP so that are preserved for MISTP and MISTP-PVST+ modes. Using MISTP-PVST+ or MISTP Chapter 7 Configuring Spanning Tree Using MISTP-PVST+ or MISTP The default spanning tree mode ...
...(802.1D) Same as port priority but configurable on a per -VLAN basis in PVST+ 20 sec 7-30 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Information about the port states is mapped to build the port database for... switches in order for the new mode, and the new spanning tree mode restarts the computation of the active topology. To use MISTP so that are preserved for MISTP and MISTP-PVST+ modes. Using MISTP-PVST+ or MISTP Chapter 7 Configuring Spanning Tree Using MISTP-PVST+ or MISTP The default spanning tree mode ...
Software Guide
Page 127
... list of configured VLAN ports on the local switch. When in the PVST+ mode, use a Telnet connection through the data port or you specify the keyword config. Chapter 7 Configuring Spanning Tree Using MISTP-PVST+ or MISTP Table 7-5 MISTP Mode Default Configuration (continued) Feature Hello time Forward delay time Default Value 2 sec 15 sec Setting the MISTP-PVST...
... list of configured VLAN ports on the local switch. When in the PVST+ mode, use a Telnet connection through the data port or you specify the keyword config. Chapter 7 Configuring Spanning Tree Using MISTP-PVST+ or MISTP Table 7-5 MISTP Mode Default Configuration (continued) Feature Hello time Forward delay time Default Value 2 sec 15 sec Setting the MISTP-PVST...
Software Guide
Page 129
...Delay 15 sec Bridge ID MAC ADDR 00-d0-02-27-9c-00 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-33 When forwarding frames, the switch is from 1-65,535. Assign lower numbers to ports that are attached to faster media...; LAN speed in privileged mode: Step 1 Step 2 Task Configure the port cost for a switch port. The default differs for a port, perform this task in megabits per second. Path cost is typically equal to use ports with lower port costs. Chapter 7 Configuring Spanning Tree Using MISTP-PVST+ or ...
...Delay 15 sec Bridge ID MAC ADDR 00-d0-02-27-9c-00 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-33 When forwarding frames, the switch is from 1-65,535. Assign lower numbers to ports that are attached to faster media...; LAN speed in privileged mode: Step 1 Step 2 Task Configure the port cost for a switch port. The default differs for a port, perform this task in megabits per second. Path cost is typically equal to use ports with lower port costs. Chapter 7 Configuring Spanning Tree Using MISTP-PVST+ or ...
Software Guide
Page 130
...priority [instance] show spantree mistp-instance 1 Instance 1 Spanning tree mode MISTP Spanning tree type ieee Spanning tree instance enabled Designated Root 00-05-31-40-64-...9c-00 32769 (bridge priority:32768, sys ID ext:1) 1,74 7-34 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 If all ports have the ...The possible port priority value is 32. the default is from 0-63; Verify the port priority setting. Using MISTP-PVST+ or MISTP Chapter 7 Configuring Spanning Tree Bridge ID Priority VLANs mapped: Bridge Max Age...
...priority [instance] show spantree mistp-instance 1 Instance 1 Spanning tree mode MISTP Spanning tree type ieee Spanning tree instance enabled Designated Root 00-05-31-40-64-...9c-00 32769 (bridge priority:32768, sys ID ext:1) 1,74 7-34 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 If all ports have the ...The possible port priority value is 32. the default is from 0-63; Verify the port priority setting. Using MISTP-PVST+ or MISTP Chapter 7 Configuring Spanning Tree Bridge ID Priority VLANs mapped: Bridge Max Age...
Software Guide
Page 132
... the default instance, is enabled. however, you must map a VLAN to it in order for it to be active. Note The software does not display the status of instances, or all ] show spantree mistp-instance 2 Instance 2 Spanning tree mode MISTP Spanning tree type ieee Spanning tree instance enabled... are using MISTP-PVST+ or MISTP on a switch, you must map at once using portpri 16. Port 1/1 mistp-instance 1,3-16 using and configuring VLANs. 7-36 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Note...
... the default instance, is enabled. however, you must map a VLAN to it in order for it to be active. Note The software does not display the status of instances, or all ] show spantree mistp-instance 2 Instance 2 Spanning tree mode MISTP Spanning tree type ieee Spanning tree instance enabled... are using MISTP-PVST+ or MISTP on a switch, you must map at once using portpri 16. Port 1/1 mistp-instance 1,3-16 using and configuring VLANs. 7-36 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Note...
Software Guide
Page 147
...The default differs for a switch port. Verify the port cost setting. The possible range is typically 1000 ÷ LAN speed in privileged mode: Step 1 Step 2 Task Configure the MST port cost for different media. Chapter 7 Configuring Spanning Tree ...Default Boundary: Yes (PVST) Inst State Role Cost Prio VLANs 0 forwarding ROOT 10000 32 1 1 forwarding BDRY 10000 32 2-20 2 forwarding BDRY 10000 32 21-30 3 forwarding BDRY 10000 32 31-40 4 forwarding BDRY 10000 32 41-50 Console> (enable) 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches...
...The default differs for a switch port. Verify the port cost setting. The possible range is typically 1000 ÷ LAN speed in privileged mode: Step 1 Step 2 Task Configure the MST port cost for different media. Chapter 7 Configuring Spanning Tree ...Default Boundary: Yes (PVST) Inst State Role Cost Prio VLANs 0 forwarding ROOT 10000 32 1 1 forwarding BDRY 10000 32 2-20 2 forwarding BDRY 10000 32 21-30 3 forwarding BDRY 10000 32 31-40 4 forwarding BDRY 10000 32 41-50 Console> (enable) 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches...
Software Guide
Page 153
...the last skew - Chapter 7 Configuring Spanning Tree Configuring Spanning Tree BPDU Skewing 12 - 13 - 14 999 15 - Console> (enable) Console> (enable) show spantree mst 3 Spanning tree mode MST Instance 3 VLANs Mapped: 31-...spanning tree BPDU skewing feature perform these functions: • Allow you to show spantree bpdu-skewing mistp-instance [instance] [mod/port] 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-57 The date and time of the VLAN or PVST+ or MISTP instance and the port affected by default...
...the last skew - Chapter 7 Configuring Spanning Tree Configuring Spanning Tree BPDU Skewing 12 - 13 - 14 999 15 - Console> (enable) Console> (enable) show spantree mst 3 Spanning tree mode MST Instance 3 VLANs Mapped: 31-...spanning tree BPDU skewing feature perform these functions: • Allow you to show spantree bpdu-skewing mistp-instance [instance] [mod/port] 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-57 The date and time of the VLAN or PVST+ or MISTP instance and the port affected by default...
Software Guide
Page 158
... put the interface back in a network, the PortFast mode is received on a per-switch basis; The BPDU guard feature provides a secure response to a port, the port normally enters the spanning tree listening state. By default, spanning tree sends BPDUs from occurring in service. If a PortFast-...network immediately, instead of putting them into an errdisable state when a BPDU is supported only on the switch. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 8-2 78-15486-01 When the BPDU guard feature is transitioned to all ...
... put the interface back in a network, the PortFast mode is received on a per-switch basis; The BPDU guard feature provides a secure response to a port, the port normally enters the spanning tree listening state. By default, spanning tree sends BPDUs from occurring in service. If a PortFast-...network immediately, instead of putting them into an errdisable state when a BPDU is supported only on the switch. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 8-2 78-15486-01 When the BPDU guard feature is transitioned to all ...
Software Guide
Page 172
... UplinkFast and restore the default spanning tree bridge priority, port cost, and port-VLAN cost values to their default values, enter the clear spantree uplinkfast command. You cannot disable UplinkFast on a per -VLAN load sharing on redundant trunk links, the load-sharing configuration can disable only spanning tree UplinkFast processing on the switch. This command restores the...
... UplinkFast and restore the default spanning tree bridge priority, port cost, and port-VLAN cost values to their default values, enter the clear spantree uplinkfast command. You cannot disable UplinkFast on a per -VLAN load sharing on redundant trunk links, the load-sharing configuration can disable only spanning tree UplinkFast processing on the switch. This command restores the...
Software Guide
Page 365
...default spanning tree parameters are used). To prevent spanning tree loops, normal UDLD with the neighbor. Verify the configuration. Console> (enable) 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 23-5 Enabling UDLD aggressive mode provides additional benefits in privileged mode... a blocking port transitions to enable UDLD aggressive mode: Console> (enable) set to 10 seconds Console> (enable) This example shows how to -point links between Cisco switches running software release 5.4(3) or later releases. Chapter...
...default spanning tree parameters are used). To prevent spanning tree loops, normal UDLD with the neighbor. Verify the configuration. Console> (enable) 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 23-5 Enabling UDLD aggressive mode provides additional benefits in privileged mode... a blocking port transitions to enable UDLD aggressive mode: Console> (enable) set to 10 seconds Console> (enable) This example shows how to -point links between Cisco switches running software release 5.4(3) or later releases. Chapter...
Software Guide
Page 430
...,789. Because 32,769 is a root switch In this case, the spanning tree topology does not change after you replace the chassis with MAC reduction enabled and a default spanning tree bridge ID priority set to 32,768 to the network, the bridge ID priority of the new Catalyst 4500 series switch increments in the same manner as bridge...
...,789. Because 32,769 is a root switch In this case, the spanning tree topology does not change after you replace the chassis with MAC reduction enabled and a default spanning tree bridge ID priority set to 32,768 to the network, the bridge ID priority of the new Catalyst 4500 series switch increments in the same manner as bridge...