🎯 Obiettivi
🗺️ Scenario
📖 Guida
Lab 1 — Subnetting /26
Hai la rete 192.168.1.0/24 e devi dividerla in 4 subnet /26 da 62 host. Configura gli IP sui router e i PC, poi verifica la connettività con ping.
0%
Rete originale: 192.168.1.0/24 → 4 subnet /26
Subnet 1: .0/26
Range: .1 — .62
Bcast: .63
→ LAN Ufficio
Range: .1 — .62
Bcast: .63
→ LAN Ufficio
Subnet 2: .64/26
Range: .65 — .126
Bcast: .127
→ LAN Server
Range: .65 — .126
Bcast: .127
→ LAN Server
Subnet 3: .128/26
Range: .129 — .190
Bcast: .191
→ LAN Guest
Range: .129 — .190
Bcast: .191
→ LAN Guest
Subnet 4: .192/26
Range: .193 — .254
Bcast: .255
→ Link WAN
Range: .193 — .254
Bcast: .255
→ Link WAN
🌍 R1 — Gateway per tutte le subnet
Gi0/0: .1/26 (Ufficio) | Gi0/1: .65/26 (Server)
Gi0/2: .129/26 (Guest)
Gi0/0: .1/26 (Ufficio) | Gi0/1: .65/26 (Server)
Gi0/2: .129/26 (Guest)
🖥️ PC1
.10/26
.10/26
🖧 SRV1
.70/26
.70/26
📱 Guest1
.130/26
.130/26
1Calcola le subnet
/24 → /26 = 2 bit rubati = 4 subnet.
Block = 256−192 = 64
Subnet: .0, .64, .128, .192
Block = 256−192 = 64
Subnet: .0, .64, .128, .192
2Rispondi alle domande di subnetting
Il lab ti chiederà network, broadcast e range di ogni subnet. Rispondi correttamente!
3Configura R1
enable → conf t
int Gi0/0 → ip address 192.168.1.1 255.255.255.192 → no shut
int Gi0/1 → ip address 192.168.1.65 255.255.255.192 → no shut
int Gi0/2 → ip address 192.168.1.129 255.255.255.192 → no shut
int Gi0/0 → ip address 192.168.1.1 255.255.255.192 → no shut
int Gi0/1 → ip address 192.168.1.65 255.255.255.192 → no shut
int Gi0/2 → ip address 192.168.1.129 255.255.255.192 → no shut
4Test connettività
Da PC1:
ping 192.168.1.1 (gateway) → ✅
ping 192.168.1.70 (SRV1, altra subnet) → ✅ via router
ping 192.168.1.1 (gateway) → ✅
ping 192.168.1.70 (SRV1, altra subnet) → ✅ via router
💡 Il gateway di ogni subnet è il primo IP utilizzabile (.1, .65, .129). I PC usano l'ultimo disponibile o un IP a scelta nel range.
R1 — Console
R1
PC1
SRV1
Guest1
R1>