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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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...Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 xxiii Configuring Gigabit Ethernet Switching Describes how to configure Gigabit Ethernet switching on the switch...Fast Ethernet Switching Describes how to perform a baseline configuration of the Catalyst enterprise LAN switches. Preface...switch. Configuring the Switch IP Address and Default Gateway Describes how to configure Ethernet and Fast Ethernet switching on the switch. Audience This publication is for configuring and maintaining Catalyst enterprise LAN switches...
...Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 xxiii Configuring Gigabit Ethernet Switching Describes how to configure Gigabit Ethernet switching on the switch...Fast Ethernet Switching Describes how to perform a baseline configuration of the Catalyst enterprise LAN switches. Preface...switch. Configuring the Switch IP Address and Default Gateway Describes how to configure Ethernet and Fast Ethernet switching on the switch. Audience This publication is for configuring and maintaining Catalyst enterprise LAN switches...
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... are shown: • Server A, equipped with channel- You can burst up 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 Each workstation can bundle multiple oversubscribed ports into a Gigabit EtherChannel link to connect to the Gigabit Ethernet...
... are shown: • Server A, equipped with channel- You can burst up 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 Each workstation can bundle multiple oversubscribed ports into a Gigabit EtherChannel link to connect to the Gigabit Ethernet...
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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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...R 6 Configuring Fast EtherChannel and Gigabit EtherChannel This chapter describes how to the Catalyst 4500 Series, Catalyst 2948G, and Catalyst 2980G Switches Command Reference. Note For complete information on installing Catalyst 4500 series Fast Ethernet and Gigabit Ethernet modules, refer to supervisor engine Fast ...used in this chapter, refer to 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. The configuration procedures in this chapter apply to ...
...R 6 Configuring Fast EtherChannel and Gigabit EtherChannel This chapter describes how to the Catalyst 4500 Series, Catalyst 2948G, and Catalyst 2980G Switches Command Reference. Note For complete information on installing Catalyst 4500 series Fast Ethernet and Gigabit Ethernet modules, refer to supervisor engine Fast ...used in this chapter, refer to 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. The configuration procedures in this chapter apply to ...
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...a trunk. Understanding Frame Distribution EtherChannel distributes frames across the ports in an EtherChannel must be run only on Cisco switches and those switches released by the spanning tree feature, the maximum supported number of each frame. Note MAC address notification settings are...an EtherChannel bundle do not have formed a channel, you group multiple Fast or Gigabit Ethernet ports into a single EtherChannel. Ports in IEEE 802.3ad, allows Cisco switches to the 802.3ad specification. Depending on the switch. In addition, on the Catalyst 4500 series switches, you can...
...a trunk. Understanding Frame Distribution EtherChannel distributes frames across the ports in an EtherChannel must be run only on Cisco switches and those switches released by the spanning tree feature, the maximum supported number of each frame. Note MAC address notification settings are...an EtherChannel bundle do not have formed a channel, you group multiple Fast or Gigabit Ethernet ports into a single EtherChannel. Ports in IEEE 802.3ad, allows Cisco switches to the 802.3ad specification. Depending on the switch. In addition, on the Catalyst 4500 series switches, you can...
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... Spanning Tree Port Cost, page 6-8 • Setting the EtherChannel Spanning Tree Port VLAN Cost, page 6-9 • Removing an EtherChannel Bundle, page 6-9 • Displaying EtherChannel Configuration Information, page 6-10 • Displaying EtherChannel Traffic Statistics, page 6-11 • Displaying EtherChannel...a channel with a port in on mode, because ports in on mode can form a single EtherChannel. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-6 78-15486-01 In addition to display the EtherChannel ID. Forming an ...
... Spanning Tree Port Cost, page 6-8 • Setting the EtherChannel Spanning Tree Port VLAN Cost, page 6-9 • Removing an EtherChannel Bundle, page 6-9 • Displaying EtherChannel Configuration Information, page 6-10 • Displaying EtherChannel Traffic Statistics, page 6-11 • Displaying EtherChannel...a channel with a port in on mode, because ports in on mode can form a single EtherChannel. Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-6 78-15486-01 In addition to display the EtherChannel ID. Forming an ...
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...is assigned automatically if one is not already assigned to forwarding mode). 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-7 Administrative group membership is defined automatically. Port(s) 3/5-6 ...channel mode set port channel 3/5-6 on connected ports causes the specified ports to admin group 57. To create an EtherChannel port bundle...
...is assigned automatically if one is not already assigned to forwarding mode). 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-7 Administrative group membership is defined automatically. Port(s) 3/5-6 ...channel mode set port channel 3/5-6 on connected ports causes the specified ports to admin group 57. To create an EtherChannel port bundle...
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...PAgP Console> (enable) set the EtherChannel VLAN cost for 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 Warning:channel cost may not be applicable if channel is set port channel port_list... channel to its default configuration (you want to set to 31. Console> (enable) Removing an EtherChannel Bundle To return a Fast EtherChannel or Gigabit EtherChannel bundle to 12. Setting the spanning tree port VLAN cost provides load balancing of VLAN traffic across multiple channels ...
...PAgP Console> (enable) set the EtherChannel VLAN cost for 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 Warning:channel cost may not be applicable if channel is set port channel port_list... channel to its default configuration (you want to set to 31. Console> (enable) Removing an EtherChannel Bundle To return a Fast EtherChannel or Gigabit EtherChannel bundle to 12. Setting the spanning tree port VLAN cost provides load balancing of VLAN traffic across multiple channels ...
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...shows how to configure a four-port Fast EtherChannel link between two switches. Display EtherChannel PAgP statistics by EtherChannel ID. 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 Display EtherChannel PAgP ... • 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.
...shows how to configure a four-port Fast EtherChannel link between two switches. Display EtherChannel PAgP statistics by EtherChannel ID. 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 Display EtherChannel PAgP ... • 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.
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...) %PAGP-5-PORTFROMSTP:Port 1/1 left bridge port 1/1 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-13 VLAN 1 modified. VLAN Mod/Ports 50 1/1-4 2/1-2 3/1-3 Switch_A> (enable) set port speed 1/1-4 100 Ports 1/1-4 transmission speed set to negotiate a Fast EtherChannel bundle with the neighboring switch. Switch_B> (enable) set port duplex 3/1-4 full Ports 3/1-4 set to...
...) %PAGP-5-PORTFROMSTP:Port 1/1 left bridge port 1/1 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-13 VLAN 1 modified. VLAN Mod/Ports 50 1/1-4 2/1-2 3/1-3 Switch_A> (enable) set port speed 1/1-4 100 Ports 1/1-4 transmission speed set to negotiate a Fast EtherChannel bundle with the neighboring switch. Switch_B> (enable) set port duplex 3/1-4 full Ports 3/1-4 set to...
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... 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 EtherChannel Configuration Examples Chapter 6 Configuring Fast EtherChannel and Gigabit...3/2 joined bridge port 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 WS-C4012 009979082(...
... 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 EtherChannel Configuration Examples Chapter 6 Configuring Fast EtherChannel and Gigabit...3/2 joined bridge port 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 WS-C4012 009979082(...
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...PAGP-5-PORTTOSTP: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 VLAN 1 modified. Switch_A> (enable) set port channel 2/1-2 on Port(s)...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...
...PAGP-5-PORTTOSTP: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 VLAN 1 modified. Switch_A> (enable) set port channel 2/1-2 on Port(s)...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...
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...turn on channeling by setting the port channel mode to handle channeling, use LACP. Spanning tree loops can occur, and eventually the switch will pass over the EtherChannel. Table 6-2 EtherChannel Modes That Use LACP Mode on off . With the on mode, a usable ...and Gigabit EtherChannel Step 4 After the EtherChannel bundle is connected to another port group in on mode. If you want LACP to off Description Mode 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...
...turn on channeling by setting the port channel mode to handle channeling, use LACP. Spanning tree loops can occur, and eventually the switch will pass over the EtherChannel. Table 6-2 EtherChannel Modes That Use LACP Mode on off . With the on mode, a usable ...and Gigabit EtherChannel Step 4 After the EtherChannel bundle is connected to another port group in on mode. If you want LACP to off Description Mode 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...
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...port cost values that changes in bandwidth will not result in changes to the cost of the port concerned. When a switch port transitions directly from an aggregate link (port bundle), the bandwidth of the aggregate link increases or decreases. These changes in bandwidth lead to the recalculation of the default port... 32-bit (long) default port cost values to each port using STP is 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 You can create temporary data loops.
...port cost values that changes in bandwidth will not result in changes to the cost of the port concerned. When a switch port transitions directly from an aggregate link (port bundle), the bandwidth of the aggregate link increases or decreases. These changes in bandwidth lead to the recalculation of the default port... 32-bit (long) default port cost values to each port using STP is 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 You can create temporary data loops.
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...perform this task in the network must set to have the same path cost defaults. Portvlancost. - EtherChannel computes the cost of a bundle using PVST+ spanning tree mode, all the ports to use long format default values. Command set spantree defaultcostmode {short | long} This...Portvlancost. - You can set . When you must have the same pathcost default 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 The default port cost mode in PVST+ is incremented by 3000. • The ...
...perform this task in the network must set to have the same path cost defaults. Portvlancost. - EtherChannel computes the cost of a bundle using PVST+ spanning tree mode, all the ports to use long format default values. Command set spantree defaultcostmode {short | long} This...Portvlancost. - You can set . When you must have the same pathcost default 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 The default port cost mode in PVST+ is incremented by 3000. • The ...
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... IEEE 802.1Q-802.1Q trunking encapsulation. Trunking Overview A trunk is a point-to the Catalyst 4500 Series, Catalyst 2948G, and Catalyst 2980G Switches Command Reference. Note For complete information on a Fast or Gigabit EtherChannel bundle. You can configure a trunk on a single Fast or Gigabit Ethernet port or on configuring VLANs, see Chapter 6, "Configuring Fast EtherChannel...
... IEEE 802.1Q-802.1Q trunking encapsulation. Trunking Overview A trunk is a point-to the Catalyst 4500 Series, Catalyst 2948G, and Catalyst 2980G Switches Command Reference. Note For complete information on a Fast or Gigabit EtherChannel bundle. You can configure a trunk on a single Fast or Gigabit Ethernet port or on configuring VLANs, see Chapter 6, "Configuring Fast EtherChannel...
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...bundle, and then configure the EtherChannel bundle as an 802.1Q trunk link, follow these steps: Step 1 Make sure that all ports are assigned to see Chapter 6, "Configuring Fast EtherChannel and Gigabit EtherChannel." In this example, all ports on both Switch A and Switch... 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-Release 8.1 11-9 This VLAN is 802.1Q-capable.) Figure 11-1 shows two switches connected through four 1000BASE-SX Gigabit Ethernet ports. Figure 11-1 IEEE 802....
...bundle, and then configure the EtherChannel bundle as an 802.1Q trunk link, follow these steps: Step 1 Make sure that all ports are assigned to see Chapter 6, "Configuring Fast EtherChannel and Gigabit EtherChannel." In this example, all ports on both Switch A and Switch... 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-Release 8.1 11-9 This VLAN is 802.1Q-capable.) Figure 11-1 shows two switches connected through four 1000BASE-SX Gigabit Ethernet ports. Figure 11-1 IEEE 802....
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Switch_A> (enable) set trunk 2/3 desirable dot1q Port(s) 2/3-6 trunk mode set to all of the ports in the bundle. The configuration is negotiated, enter the show trunk Port Mode Encapsulation 2/3 desirable dot1q 2/4 desirable dot1q 2/5 desirable dot1q 2/6 ... 1-1005, 1025-4094 1-1005, 1025-4094 1-1005, 1025-4094 Port Vlans allowed and active in management domain 11-10 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 The system logging messages provide information about the formation of the 802.1Q trunk....
Switch_A> (enable) set trunk 2/3 desirable dot1q Port(s) 2/3-6 trunk mode set to all of the ports in the bundle. The configuration is negotiated, enter the show trunk Port Mode Encapsulation 2/3 desirable dot1q 2/4 desirable dot1q 2/5 desirable dot1q 2/6 ... 1-1005, 1025-4094 1-1005, 1025-4094 1-1005, 1025-4094 Port Vlans allowed and active in management domain 11-10 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01 The system logging messages provide information about the formation of the 802.1Q trunk....
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...1025-4094 3/6 1-1005, 1025-4094 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 Switch_A> (enable) Switch_B> (enable) show port channel No ports ...1025-4094 Port Vlans in EtherChannel auto mode. This example assumes that the neighboring ports on Switch A to negotiate a Gigabit EtherChannel bundle with the neighboring switch. Switch_A> (enable) show port channel No ports channelling Switch_A> (enable) show trunk ...
...1025-4094 3/6 1-1005, 1025-4094 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 Switch_A> (enable) Switch_B> (enable) show port channel No ports ...1025-4094 Port Vlans in EtherChannel auto mode. This example assumes that the neighboring ports on Switch A to negotiate a Gigabit EtherChannel bundle with the neighboring switch. Switch_A> (enable) show port channel No ports channelling Switch_A> (enable) show trunk ...