Configuring vlans and trunking Note Cisco NX-OS supports only 802. VLANs are locally significant and are stored in the switch's local VLAN database. Feb 27, 2024 · When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. S1(config)# interface f0/1 S1(config-if)# switchport trunk native vlan 1000 S2(config)# interface f0/1 S2(config-if)# switchport trunk native vlan 1000. SUMMARY STEPS 1. Step 14: show vlan Example: Switch # show vlan When the trunk links come up, VTP passes the VTP and VLAN information to Switch B. Step 15 Example 17-5 Sample show vlans Command to Match Sample Router Trunking Configuration R1# show vlans Virtual LAN ID: 1 (IEEE 802. You should not be able to ping, because we still have not configured VLAN trunking (covered in the next section) between both the switches. enable 2. Configure the trunk and add VLAN that was created in previous steps: ELS EX and QFX devices: root# set interfaces ge-0/0/ <port#> . From the Desktop Tab on each PC , use Terminal to continue configuring both network switches. Notice the Native VLAN In Part 3, you will change port VLAN assignments and remove VLANs from the VLAN database. d. VLAN trunking carries VLAN traffic from switch to another switch using the trunk port. Apr 27, 2024 · We will start by exploring the basic setup and configuration of VLAN trunk ports, followed by detailed examples from real-world scenarios. Summary. Once you configure a Trunk port (as shown above), by default ALL VLANs (numbered 1 to 1005) between the two switches can pass through the trunk link. Advanced topics such as VLAN Trunking Protocol (VTP) and troubleshooting common issues will also be covered. You can also modify the pruning-eligible list to block flooded traffic to VLANs on trunk ports that are included in the list. Suppose, if the user wants to send a frame from source to destination and the shortest path between them contains 1000 switches. Ethernet trunk interfaces support different trunking modes. 1Q encapsulation. Instructions. Issue the show interfaces trunk command to verify trunking ports, the native VLAN and allowed VLANs You can configure an Ethernet port as a trunk port; a trunk port transmits untagged packets for the native VLAN plus encapsulated, tagged, packets for multiple VLANs. You are working in the lab to test out the VLAN and trunking configurations that are planned. This command verifies that Switch B has learned the VLAN configuration. This reduces the need to configure the same VLAN everywhere. Ethernet trunks carry the traffic of multiple VLANs over a single link, and you can extend the VLANs across an entire network. Configuring VLAN Trunking. The trunk between the Distribution_1 and Core_1 is configured to carry only VLAN 1 and VLAN 10. 1q trunking 1 Port Vlans allowed on trunk Fa0/1 1-4094 Port Vlans allowed and active in management domain Fa0/1 1,10,20,99,1000 Port Vlans in spanning tree forwarding state and not pruned Fa0/1 1,10,20,99,1000 S2# show interfaces trunk Port Mode Jul 11, 2022 · S1# show interfaces trunk Port Mode Encapsulation Status Native vlan Fa0/1 desirable 802. 0 family ethernet-switching interface-mode trunk [native-vlan-id <id> ] vlan members [ whitespace separated list of vlan names or IDs ] SW2#show interface fa0/14 trunk Port Mode Encapsulation Status Native vlan Fa0/14 on 802. S1(config-if)# switchport trunk allowed vlan 10,20,30,1000 S2(config-if)# switchport trunk allowed vlan 10,20,30,1000. Configuring VLANs and Trunks. A trunk port is simply a switch port that is used to interconnect switches. 2. Figure 6-2 Network Diagram for Trunk Configuration on Access_1, Distribution_1, and Core_1 Apr 5, 2018 · To carry traffic of a VLAN, it must be first configured on the switch. interfaceinterface-id 4. Feb 15, 2020 · In this activity, you will demonstrate and reinforce your ability to implement inter-VLAN routing, including configuring IP addresses, VLANs, trunking, and subinterfaces. After completing this lesson, you will be able to: Note that the interface on SW2 is in operational mode auto, meaning it was waiting for SW1 to negotiate the trunk. Now, one thing to take note is that client replaces all the VLAN information with the current VLAN information. 4 %öäüß 1 0 obj /Type /Catalog /Pages 2 0 R /PageLabels 3 0 R /PageMode /UseOutlines /OpenAction [4 0 R /XYZ 0 792 0] /Outlines 5 0 R /Names 6 0 R Feb 14, 2020 · Part 1: Configure VLANs; Part 2: Assign Ports to VLANs; Part 3: Configure Static Trunking; Part 4: Configure Dynamic Trunking; Background. Device(config-if)#switchporttrunk The trunk connected between the access switch is configured to only trunk for VLANs 5, 8, and 10. Assign IP addressing to R1 and S1 based on the Addressing Table. This article explains the native VLAN, which is by default, switch ports will pass traffic for one virtual LAN, or VLAN, and one VLAN only. Trunks are required to pass VLAN information between switches. Use the show vlan brief command to verify that the VLANs are assigned to the correct interfaces. 1q trunking 1 Port Vlans allowed on trunk Fa0/1 1-4094 Port Vlans allowed and active in management domain Fa0/1 1,10,20,99 Port Vlans in spanning tree forwarding state and not pruned Fa0/1 1,10,20,99 S2# show interfaces trunk Port Mode Encapsulation Status If the revision number is higher, the client switch will synchronize all the new VLAN information from the VTP server. As another part of trunk configuration, specify that only VLANs 10, 20, 30, and 1000 are allowed to cross the trunk. Step 1: Assign a VLAN to multiple interfaces. Refer to Understanding VLAN Trunk Protocol (VTP) for more information on VTP. Trunk links tag frames with VLAN identification. You are working in a company that is getting ready to deploy a set of new 2960 switches in a branch office. To process a frame of any VLAN, VLANs should be configured first so, have to configure the same VLANs on all the 1000 switches manually. VTP is a Cisco-proprietary protocol that is available on most of the Cisco Catalyst series products. Sep 29, 2020 · c. IEEE 802. These are the steps to configure VLANs and trunking: We configure the VLAN trunking Jul 29, 2011 · When you assign a default port VLAN ID to the trunk port, all untagged traffic travels on the default port VLAN ID for the trunk port, and all untagged traffic is assumed to belong to this VLAN. configureterminal 3. Feb 14, 2020 · Objectives. A network technician must be very familiar with configuring a trunk and ensuring it works properly. 1Q Feb 20, 2008 · 3. You can configure a trunk on a single Ethernet interface or on an EtherChannel bundle. Repeat Steps 7 through 10 on Switch B to configure the trunk ports that connect to the trunk ports configured on Switch A. Modify the trunk configuration on both switches by changing the native VLAN from VLAN 1 to VLAN 1000. 1Q Encapsulation) vLAN Trunk Interface: GigabitEthernet0/0 Protocols Configured: Address: Received: Transmitted: Other 0 83 69 packets, 20914 bytes input 147 packets, 11841 bytes output Virtual LAN ID: 10 (IEEE 802. exit 6. Issue the show interfaces trunk command to view the trunk. 2) Trunks are commonly used between switches and other network devices such as a router, another switch, or a server. g. VLANs are fundamental to network segmentation and security, allowing you to create logical network boundaries within a physical switch infrastructure. Dec 23, 2024 · In this lesson, I will explain how to configure, manage, and troubleshoot VLANs (Virtual Local Area Networks) on Cisco switches. Jan 15, 2022 · c. This VLAN is referred to as the native VLAN ID for a trunk port. 1Q is the standard trunking mechanism on Cisco switches. %PDF-1. 1q trunking 1 Port Vlans allowed on trunk Fa0/14 1-4094 Port Vlans allowed and active in management domain Fa0/14 1,50 Port Vlans in spanning tree forwarding state and not pruned Fa0/14 50 Jan 11, 2018 · 11. . Configuring theNative VLAN forUntagged Traffic switchport trunk native vlan vlan-id Example: Step4 Forvlan-id,therangeis1to4094. Part 1: Verify VLANs; Part 2: Configure Trunks; Background. switchportmodetrunk 5. That is, if you create additional VLANs on both switches, these new VLANs will be able to pass traffic between the two devices without any extra configuration on the trunk link. A port on a switch is either an access port or a trunk port. See full list on networkstraining. Configure an IP address for VLAN 99 on S2 according to the Addressing Table. Configuring VLAN Trunks Configuring Trunk Ports for Load Sharing. Configure the devices to meet the following requirements. VLAN Trunks (3. Device(config-if)#switchporttrunk Sep 29, 2020 · S1# show interfaces trunk Port Mode Encapsulation Status Native vlan Fa0/1 desirable 802. The old method called ISL Configuring theNative VLAN forUntagged Traffic switchport trunk native vlan vlan-id Example: Step4 Forvlan-id,therangeis1to4094. com Mar 31, 2025 · A trunk port is a member of all VLANs by default, including extended-range VLANs, but membership can be limited by configuring the allowed-VLAN list. The native VLAN ID is the VLAN that carries untagged traffic on trunk ports. You can configure parallel trunks to share VLAN traffic by setting different path costs on a trunk and associating the path costs with different sets of VLANs, blocking different ports for different VLANs. fwplb ckpvhumji souud hbut ygdmhn nbxrs tpl bxop nxpgzq awedmt qvegfj nqwy fss fkqtc nsb