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... P T E R 6 C H A P T E R 78-15486-01 Configuring Gigabit Ethernet Switching 5-1 Understanding How Gigabit Ethernet Works 5-1 Understanding How Gigabit Ethernet Flow Control Works 5-1 Understanding How Port Negotiation... 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
... P T E R 6 C H A P T E R 78-15486-01 Configuring Gigabit Ethernet Switching 5-1 Understanding How Gigabit Ethernet Works 5-1 Understanding How Gigabit Ethernet Flow Control Works 5-1 Understanding How Port Negotiation... 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
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... BackboneFast features. Configuring Gigabit Ethernet Switching Describes how to configure Gigabit Ethernet switching on the switch. Preface This preface describes who are responsible for configuring and maintaining Catalyst enterprise LAN switches. Configuring Ethernet and Fast Ethernet Switching Describes how to configure Fast EtherChannel and and Gigabit EtherChannel Gigabit EtherChannel port bundles. Configuring Fast EtherChannel Describes how to...
... BackboneFast features. Configuring Gigabit Ethernet Switching Describes how to configure Gigabit Ethernet switching on the switch. Preface This preface describes who are responsible for configuring and maintaining Catalyst enterprise LAN switches. Configuring Ethernet and Fast Ethernet Switching Describes how to configure Fast EtherChannel and and Gigabit EtherChannel Gigabit EtherChannel port bundles. Configuring Fast EtherChannel Describes how to...
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... high-end workstations. We do not recommend connecting these ports to the switch through a two-port Gigabit EtherChannel trunk link providing 2-Gbps bandwidth. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 5-5 These configurations are shown: •...connected devices to transmit traffic simultaneously. Bundling multiple oversubscribed ports in each direction. • Server D is the only device that is connected to the oversubscribed port group and can bundle multiple oversubscribed ports into a Gigabit ...
... high-end workstations. We do not recommend connecting these ports to the switch through a two-port Gigabit EtherChannel trunk link providing 2-Gbps bandwidth. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 5-5 These configurations are shown: •...connected devices to transmit traffic simultaneously. Bundling multiple oversubscribed ports in each direction. • Server D is the only device that is connected to the oversubscribed port group and can bundle multiple oversubscribed ports into a Gigabit ...
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... 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 switch CAUTION THIS ASSEMBLY CONTAINS ELECTROSTATICSENSITIVE DEVICES 0% 100% 18069 Gigabit EtherChannel bundles Server A Server B Workstation 1 Workstation 3 Server D Workstation...
... 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 switch CAUTION THIS ASSEMBLY CONTAINS ELECTROSTATICSENSITIVE DEVICES 0% 100% 18069 Gigabit EtherChannel bundles Server A Server B Workstation 1 Workstation 3 Server D Workstation...
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...configure Fast EtherChannel and Gigabit EtherChannel port bundles on switching modules and fixed-configuration switches, as well as to the Catalyst 4500 Series Installation Guide. Note For complete information on installing Catalyst 4500 series Fast Ethernet and Gigabit Ethernet... this chapter apply to Fast Ethernet and Gigabit Ethernet switch ports on the Catalyst enterprise LAN switches. Note For complete syntax and usage information for EtherChannel, page 6-2 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-1 CH A P ...
...configure Fast EtherChannel and Gigabit EtherChannel port bundles on switching modules and fixed-configuration switches, as well as to the Catalyst 4500 Series Installation Guide. Note For complete information on installing Catalyst 4500 series Fast Ethernet and Gigabit Ethernet... this chapter apply to Fast Ethernet and Gigabit Ethernet switch ports on the Catalyst enterprise LAN switches. Note For complete syntax and usage information for EtherChannel, page 6-2 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-1 CH A P ...
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... and they do not have to eight ports. You can configure both Fast and Gigabit EtherChannel bundles as a trunk. PAgP is not configurable. The frame distribution method is a Cisco-proprietary protocol that conform to the port ID handling by licensed vendors. A trap is sent ...traffic previously carried over the failed port switches to form a channel through dynamic negotiation with devices that can be on the Catalyst 4500 series switches, you group multiple Fast or Gigabit Ethernet ports into a single EtherChannel. An EtherChannel bundle can consist of each frame. PAgP and...
... and they do not have to eight ports. You can configure both Fast and Gigabit EtherChannel bundles as a trunk. PAgP is not configurable. The frame distribution method is a Cisco-proprietary protocol that conform to the port ID handling by licensed vendors. A trap is sent ...traffic previously carried over the failed port switches to form a channel through dynamic negotiation with devices that can be on the Catalyst 4500 series switches, you group multiple Fast or Gigabit Ethernet ports into a single EtherChannel. An EtherChannel bundle can consist of each frame. PAgP and...
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... EtherChannel IDs Configuring an EtherChannel creates an administrative group, designated by an integer between 1 and 1024, inclusive, to configure an EtherChannel bundle using PAgP: • Creating an EtherChannel, page 6-7 • Defining an EtherChannel Administrative Group, page 6-7 • Setting the ... group consisting of eight ports. In addition to the same administrative group can form a single EtherChannel. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-6 78-15486-01 You can change if the EtherChannel is torn down and...
... EtherChannel IDs Configuring an EtherChannel creates an administrative group, designated by an integer between 1 and 1024, inclusive, to configure an EtherChannel bundle using PAgP: • Creating an EtherChannel, page 6-7 • Defining an EtherChannel Administrative Group, page 6-7 • Setting the ... group consisting of eight ports. In addition to the same administrative group can form a single EtherChannel. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-6 78-15486-01 You can change if the EtherChannel is torn down and...
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...that are assigned to on connected ports causes the specified ports to forwarding mode). 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-7 Verify the EtherChannel configuration. When you are unsure which ports ...you can configure as an EtherChannel, verify the EtherChannel capabilities for the module or switch you create an EtherChannel port bundle, an...
...that are assigned to on connected ports causes the specified ports to forwarding mode). 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-7 Verify the EtherChannel configuration. When you are unsure which ports ...you can configure as an EtherChannel, verify the EtherChannel capabilities for the module or switch you create an EtherChannel port bundle, an...
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...spanning tree port VLAN cost provides load balancing of the VLANs in a trunk channel. Console> (enable) Removing an EtherChannel Bundle To return a Fast EtherChannel or Gigabit EtherChannel bundle to its default configuration, perform this task in the channel have port cost. Console> (enable) Setting the EtherChannel Spanning ... Command Determine the EtherChannel ID of the EtherChannel for channel ID 768: Console> (enable) show port channel [mod_num[/port_num]] 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-9
...spanning tree port VLAN cost provides load balancing of the VLANs in a trunk channel. Console> (enable) Removing an EtherChannel Bundle To return a Fast EtherChannel or Gigabit EtherChannel bundle to its default configuration, perform this task in the channel have port cost. Console> (enable) Setting the EtherChannel Spanning ... Command Determine the EtherChannel ID of the EtherChannel for channel ID 768: Console> (enable) show port channel [mod_num[/port_num]] 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-9
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...8226; Configuration Example of Two-Port Gigabit EtherChannel, page 6-14 Note For examples of configuring VLAN trunks on EtherChannel port bundles, see the "Example VLAN Trunk Configurations" section on page 11-9. EtherChannel Configuration Examples Chapter 6 Configuring Fast EtherChannel and Gigabit...EtherChannel PAgP statistics by EtherChannel administrative group. Figure 6-1 shows two switches connected through four 100BASE-TX Fast Ethernet ports. 6-12 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Command show port...
...8226; Configuration Example of Two-Port Gigabit EtherChannel, page 6-14 Note For examples of configuring VLAN trunks on EtherChannel port bundles, see the "Example VLAN Trunk Configurations" section on page 11-9. EtherChannel Configuration Examples Chapter 6 Configuring Fast EtherChannel and Gigabit...EtherChannel PAgP statistics by EtherChannel administrative group. Figure 6-1 shows two switches connected through four 100BASE-TX Fast Ethernet ports. 6-12 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Command show port...
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... and Gigabit EtherChannel EtherChannel Configuration Examples Figure 6-1 Example of a Fast EtherChannel Port Bundle 1/1 Switch A 1/2 1/3 1/4 3/1 3/2 Switch B 3/3 3/4 23923 Fast EtherChannel port bundle To configure a four-port EtherChannel link between two switches, follow these steps: Step 1 Step 2 Step 3 Make sure that the neighboring ports on Switch A and Switch B have the same port configuration, including VLAN membership, speed, and duplex. Switch_A...
... and Gigabit EtherChannel EtherChannel Configuration Examples Figure 6-1 Example of a Fast EtherChannel Port Bundle 1/1 Switch A 1/2 1/3 1/4 3/1 3/2 Switch B 3/3 3/4 23923 Fast EtherChannel port bundle To configure a four-port EtherChannel link between two switches, follow these steps: Step 1 Step 2 Step 3 Make sure that the neighboring ports on Switch A and Switch B have the same port configuration, including VLAN membership, speed, and duplex. Switch_A...
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...3/1-4 %PAGP-5-PORTTOSTP:Port 3/3 joined bridge port 3/1-4 %PAGP-5-PORTTOSTP:Port 3/4 joined bridge port 3/1-4 After the EtherChannel bundle is negotiated, enter the show port channel Port Status Channel Channel Neighbor Neighbor mode status device port 3/1 connected auto channel... command to configure a two-port Gigabit EtherChannel link between two switches. Figure 6-2 shows two switches connected through four 1000BASE-SX Gigabit Ethernet ports. 6-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01
...3/1-4 %PAGP-5-PORTTOSTP:Port 3/3 joined bridge port 3/1-4 %PAGP-5-PORTTOSTP:Port 3/4 joined bridge port 3/1-4 After the EtherChannel bundle is negotiated, enter the show port channel Port Status Channel Channel Neighbor Neighbor mode status device port 3/1 connected auto channel... command to configure a two-port Gigabit EtherChannel link between two switches. Figure 6-2 shows two switches connected through four 1000BASE-SX Gigabit Ethernet ports. 6-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01
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... Gigabit EtherChannel EtherChannel Configuration Examples Figure 6-2 Example of a Gigabit EtherChannel Port Bundle Switch A 2/1 2/2 3/1 Switch B 3/2 23922 Gigabit EtherChannel port bundle To configure a two-port Gigabit EtherChannel link between two switches, follow these steps: Step 1 Step 2 Step 3 Make sure that...:Port 3/1 joined bridge port 3/1-2 %PAGP-5-PORTTOSTP:Port 3/2 joined bridge port 3/1-2 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-15 If you configure ports on, you must configure the ports on...
... Gigabit EtherChannel EtherChannel Configuration Examples Figure 6-2 Example of a Gigabit EtherChannel Port Bundle Switch A 2/1 2/2 3/1 Switch B 3/2 23922 Gigabit EtherChannel port bundle To configure a two-port Gigabit EtherChannel link between two switches, follow these steps: Step 1 Step 2 Step 3 Make sure that...:Port 3/1 joined bridge port 3/1-2 %PAGP-5-PORTTOSTP:Port 3/2 joined bridge port 3/1-2 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-15 If you configure ports on, you must configure the ports on...
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Table 6-2 describes the EtherChannel modes that prevents the port from channeling. 6-16 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Switch_A> (enable) show port channel Port Status Channel Channel Neighbor Neighbor..., because ports in on page 6-5. Understanding the LACP Chapter 6 Configuring Fast EtherChannel and Gigabit EtherChannel Step 4 After the EtherChannel bundle is connected to another port group in passive mode passively respond to initiation and never initiate the sending of LACP packets. If...
Table 6-2 describes the EtherChannel modes that prevents the port from channeling. 6-16 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 Switch_A> (enable) show port channel Port Status Channel Channel Neighbor Neighbor..., because ports in on page 6-5. Understanding the LACP Chapter 6 Configuring Fast EtherChannel and Gigabit EtherChannel Step 4 After the EtherChannel bundle is connected to another port group in passive mode passively respond to initiation and never initiate the sending of LACP packets. If...
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... port costs between 1-200,000,000. Changes to the default port cost or changes resulting from an aggregate link (port bundle), the bandwidth of the aggregate link increases or decreases. Because of the limitations that are presented by automatically recalculating the topology..., 802.1t states that changes in bandwidth will not result in one of these states: • Blocking 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-5 Therefore, the aggregated port uses the same port cost parameters as a standalone port. Chapter...
... port costs between 1-200,000,000. Changes to the default port cost or changes resulting from an aggregate link (port bundle), the bandwidth of the aggregate link increases or decreases. Because of the limitations that are presented by automatically recalculating the topology..., 802.1t states that changes in bandwidth will not result in one of these states: • Blocking 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 7-5 Therefore, the aggregated port uses the same port cost parameters as a standalone port. Chapter...
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... VLANs associated with a lower port VLAN cost are more likely to be chosen to slower media. EtherChannel computes the cost of a bundle using PVST+ spanning tree mode, all the ports to use long format default values. Using PVST+ Chapter 7 Configuring Spanning Tree Port...port cost mode: Console> (enable) set spantree defaultcostmode long Portcost and portvlancost 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 You can enter the set the default port cost mode to long. The default...
... VLANs associated with a lower port VLAN cost are more likely to be chosen to slower media. EtherChannel computes the cost of a bundle using PVST+ spanning tree mode, all the ports to use long format default values. Using PVST+ Chapter 7 Configuring Spanning Tree Port...port cost mode: Console> (enable) set spantree defaultcostmode long Portcost and portvlancost 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 You can enter the set the default port cost mode to long. The default...
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...port or on a Fast or Gigabit EtherChannel bundle. Note For complete information on configuring VLANs, see Chapter 6, "Configuring Fast EtherChannel and Gigabit EtherChannel." 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 11-1 Note... T E R Configuring VLAN Trunks on Fast Ethernet and Gigabit Ethernet Ports This chapter describes how to the Catalyst 4500 Series, Catalyst 2948G, and Catalyst 2980G Switches Command Reference. Trunking Overview A trunk is a point-to extend VLANs across an entire network. This chapter ...
...port or on a Fast or Gigabit EtherChannel bundle. Note For complete information on configuring VLANs, see Chapter 6, "Configuring Fast EtherChannel and Gigabit EtherChannel." 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 11-1 Note... T E R Configuring VLAN Trunks on Fast Ethernet and Gigabit Ethernet Ports This chapter describes how to the Catalyst 4500 Series, Catalyst 2948G, and Catalyst 2980G Switches Command Reference. Trunking Overview A trunk is a point-to extend VLANs across an entire network. This chapter ...
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... configure the EtherChannel bundle as members of configuring trunk links between two switches with 802.1Q-capable hardware. (Use the show port capabilities command to see Chapter 6, "Configuring Fast EtherChannel and Gigabit EtherChannel." Switch_A> (enable) set vlan 1 2/3-6 VLAN Mod/Ports 1 2/3-6 Switch_A> (enable) 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
... configure the EtherChannel bundle as members of configuring trunk links between two switches with 802.1Q-capable hardware. (Use the show port capabilities command to see Chapter 6, "Configuring Fast EtherChannel and Gigabit EtherChannel." Switch_A> (enable) set vlan 1 2/3-6 VLAN Mod/Ports 1 2/3-6 Switch_A> (enable) 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
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...system logging messages provide information about the formation of the ports in the bundle. Switch_A> (enable) show trunk command to all of the ports in the EtherChannel bundle to desirable. This example assumes that the neighboring ports on trunk 1-1005...desirable dot1q Port(s) 2/3-6 trunk mode set to use dot1q or negotiate encapsulation and are in management domain 11-10 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 The configuration is negotiated, enter the show trunk Port Mode Encapsulation ...
...system logging messages provide information about the formation of the ports in the bundle. Switch_A> (enable) show trunk command to all of the ports in the EtherChannel bundle to desirable. This example assumes that the neighboring ports on trunk 1-1005...desirable dot1q Port(s) 2/3-6 trunk mode set to use dot1q or negotiate encapsulation and are in management domain 11-10 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 The configuration is negotiated, enter the show trunk Port Mode Encapsulation ...
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... Switch_B> (enable) Confirm the channeling and trunking status of the EtherChannel bundle. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 11-11 This example assumes that the neighboring ports on Switch A to negotiate a Gigabit EtherChannel bundle with the neighboring switch. Switch_A> (enable) Switch_B> (enable) show port channel No ports channelling Switch_B...
... Switch_B> (enable) Confirm the channeling and trunking status of the EtherChannel bundle. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 11-11 This example assumes that the neighboring ports on Switch A to negotiate a Gigabit EtherChannel bundle with the neighboring switch. Switch_A> (enable) Switch_B> (enable) show port channel No ports channelling Switch_B...