~ /project-1 /topology
Project 1 · Topology

Every packet between the LANs crosses R1.

Each side of the router is its own LAN with its own switch. R1 is the only path between them, so all traffic from Network A to Network B is routed.

8 devices7 linksCopper straight-through

Logical topology#

project 1 · logical view requestreply

The same network in Packet Tracer, all link lights green

Cabling#

All links are copper straight-through: each one joins an end device or the router to a switch.

From Port To
R1 GigabitEthernet0/0 Switch1
R1 GigabitEthernet0/1 Switch 2
PC A FastEthernet0 Switch1
PC B FastEthernet0 Switch1
PC1 FastEthernet0 Switch 2
PC2 FastEthernet0 Switch 2
Server 1 FastEthernet0 Switch 2

Which router port goes to which switch matters

G0/0 is Network A's gateway (.1) and G0/1 is Network B's (.65). If the two uplinks are swapped, each LAN is cabled to a router port on the other subnet. Both ports still show up/up, but nothing crosses. That is what broke the first ping, see Verification. You can try it in the ping lab on the home page.

Switches#

The 2960 switches keep their default configuration, so no setup is needed. Every port is in VLAN 1 and the switch learns MAC addresses as frames arrive. Their job is to forward frames inside each LAN. Anything leaving the LAN is sent to the router's MAC.