Network Access Intermediate ~8 min · multi-device

Two switches, one VLAN, one trunk

SW1 and SW2 are wired uplink to uplink (Gi0/1 ↔ Gi0/1). On BOTH switches: create VLAN 10 named Engineering, put Fa0/1 into access mode on VLAN 10, and configure Gi0/1 as an 802.1Q trunk.

[PC-A] ── Fa0/1 [SW1] Gi0/1 ═══ Gi0/1 [SW2] Fa0/1 ── [PC-B]

Topology

Objectives

○SW1: VLAN 10 named Engineering
○SW1: Fa0/1 access mode, VLAN 10
○SW1: Gi0/1 trunk mode
○SW2: VLAN 10 named Engineering
○SW2: Fa0/1 access mode, VLAN 10
○SW2: Gi0/1 trunk mode

Hints

Hint 1 — full sequence per switch

enable
configure terminal
 vlan 10
  name Engineering
  exit
 interface fa0/1
  switchport mode access
  switchport access vlan 10
  exit
 interface gi0/1
  switchport mode trunk
  exit
end
show vlan brief

Hint 2 — the trap

Configure BOTH switches. If only one side has the trunk, the link is either negotiated as access (dynamic) or won't tag VLAN 10 frames correctly.

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