Extra Quality - Cisco+lab+162

In the journey to earning a Cisco certification—whether it’s the CCNA, CCNP, or simply mastering enterprise networking—lab exercises are the proving ground. Among the myriad of labs found in Cisco NetAcad, OCG workbooks, and Packet Tracer activities, Cisco Lab 162 stands out as a pivotal challenge. While lab numbers can vary slightly between curriculum versions (e.g., 1.6.2, 10.3.5, or 16.2), "Cisco Lab 162" universally refers to a comprehensive topology focused on VLAN segmentation, trunking, and Inter-VLAN routing .

interface vlan 10 ip address 192.168.10.1 255.255.255.0 no shutdown interface vlan 20 ip address 192.168.20.1 255.255.255.0 no shutdown

interface gigabitEthernet 0/0 no shutdown cisco+lab+162

ping 192.168.20.3 Success (!!!) or (!.). If it fails, proceed to the troubleshooting section. Common Troubleshooting in Cisco Lab 162 Even seasoned engineers get stuck here. Here are the top 5 failure points in Lab 162:

interface fastEthernet 0/3 switchport mode access switchport access vlan 20 no shutdown Use show vlan brief to verify that Fa0/1 is now in VLAN 10 and Fa0/2 is in VLAN 20. If ports still show up as "VLAN 1 (default)," you forgot the switchport access vlan command. Phase 2: Trunk Configuration (Connecting Switches) Without trunks, SW1’s VLAN 10 traffic cannot reach SW2’s VLAN 10. Trunks using IEEE 802.1Q add a VLAN tag to each frame. In the journey to earning a Cisco certification—whether

Configure the trunk ports toward the access switches:

interface gigabitEthernet 0/1 switchport trunk encapsulation dot1q switchport mode trunk switchport trunk allowed vlan 10,20 no shutdown Run show interfaces trunk . You should see the ports listed with Native VLAN "1" and allowed VLANs "10,20". If this output is blank, the trunk did not form—check for mismatched encapsulation or cabling. Phase 3: Inter-VLAN Routing (The "162" Challenge) Now, PC1 (VLAN 10) and PC3 (VLAN 20) cannot ping each other because they are on different subnets. To enable routing, we need a Layer 3 gateway. Lab 162 usually uses a Multilayer Switch (MLS). interface vlan 10 ip address 192

| Device | Interface | IP Address | Connected To | | :--- | :--- | :--- | :--- | | | NIC | 192.168.10.2/24 | SW1 (Fa0/1) – VLAN 10 | | PC2 | NIC | 192.168.10.3/24 | SW2 (Fa0/2) – VLAN 10 | | PC3 | NIC | 192.168.20.2/24 | SW1 (Fa0/2) – VLAN 20 | | PC4 | NIC | 192.168.20.3/24 | SW2 (Fa0/3) – VLAN 20 | | Multilayer SW | VLAN 10 SVI | 192.168.10.1/24 | Trunk to SW1 & SW2 | | Multilayer SW | VLAN 20 SVI | 192.168.20.1/24 | Trunk to SW1 & SW2 |