CCNA: Troubleshoot a Broken Network

Monday morning: users in VLAN 10 report "no network". The previous engineer left three faults. Find and fix them using show commands — nothing is told to you directly.

Tasks

  1. PC1 can't reach its gateway 192.168.10.1. Check the switch port (show vlan brief, show interfaces status) and fix it.
  2. R1 and R2 aren't OSPF neighbours. Compare show ip ospf interface on both and fix the mismatch.
  3. Routes are there but PC1 still can't reach SRV (192.168.30.10). Check show access-lists and interface ACLs on R2.
  4. Final check: PC1 pings SRV successfully.