3.4.5 Packet tracer - Configuracion de enlaces troncales (Resolucion)
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Configuring Trunk Links in Trunk Configuration Laboratory
- Show the current VLANs in s1 using the "show vlan brief" command.
- Display and verify that all the VLANs are configured and assigned to the correct switch ports in s2 and s3 using the same command.
- Check the loss of connectivity between computers on the same network by pinging between PCs on the same VLAN but different switches.
- Configure the trunk link on s1 using VLAN 99 as the native VLAN.
Configuring Trunk Links and Native VLAN for Switches
- Configure Gigabit 01 and Gigabit 02 interfaces on S1 as trunk links.
- Use the command "switchport mode trunk" to assign the interfaces as trunk ports.
- Set the native VLAN for Gigabit 01 and Gigabit 02 interfaces on S1 to VLAN 99 using the command "switchport trunk native vlan 99".
- Note that the trunk ports may take a short period of time to become active again due to the spanning protocol.
- The messages indicating a mismatch or discrepancy between the native VLANs of different switches do not affect communication between devices on the same VLAN.
- S2 and S3 are still using VLAN 1 as the default native VLAN, while S1 uses VLAN 99 as the native VLAN.
- Verify that the trunk links are successfully negotiated by executing the "show interface trunk" command on S2 and S3.
Configuring Trunk Interfaces on S2 and S3
- DTP protocol automatically negotiates a trunk link and specifies which active VLANs are allowed to cross the trunk link.
- Show interface trunk command on S2 displays the allowed VLANs on gigabit port 01.
- Show interface trunk command on S3 displays the allowed VLANs on gigabit port 02.
- There is a discrepancy in the native VLAN between S2 (VLAN 1) and S3 (VLAN 999).
- Configure VLAN 99 as the native VLAN on interfaces of S2 and S3 using the command "switchport trunk native vlan 99".
- Verify the correct configuration of the native VLAN using the show interface trunk command.
- Use the show interface command with the interface number and "switchport" option to verify that the native VLAN is set to 99.
Troubleshooting VLAN Assignment Issue on Gigabit Port 01
- Gigabit Port 01 is no longer assigned to VLAN 1.
- The show command "show vlan brief" does not display ports assigned to trunk links.
- Only access ports are shown in the output of the command.
- The issue has been resolved and everything is working fine now.
Troubleshooting and configuring VLANs on S1, S2, and S3.
- Use "show vlan brief" command on s1 to view current VLANs.
- Verify VLANs configuration and assignment on s2 and s3 using "show vlan brief" command.
- Test connectivity between PCs on the same VLAN but different switches using ping.
- Configure trunk link on s1 with VLAN 99 as native VLAN.
- Set Gigabit 01 and Gigabit 02 interfaces on s1 as trunk links using "switchport mode trunk" command.
- Set native VLAN for Gigabit 01 and Gigabit 02 interfaces on s1 to VLAN 99 using "switchport trunk native vlan 99" command.