Media Converter In Cisco Packet Tracer Link May 2026
Because the media converter is Layer 1, you ignore it for IP/Trunking configuration. You configure the switches as if they were directly connected via a long cable.
In Packet Tracer, physical compatibility matters.
If you try to drag a copper cable from a 2960 switch to an SFP port on a 3560 switch, Packet Tracer will refuse the connection. You need a translator.
The most common application for this device in the simulator is connecting a standard Ethernet device (like a PC, Switch, or Router) to a Fiber Optic network.
| Device | Interface 1 | Cable Type | Connected To | Interface 2 | | :--- | :--- | :--- | :--- | :--- | | Router0 | Fa0/0 (Copper) | Copper Straight-through | Media Converter1 | Copper Port | | Media Converter1 | Copper Port | Fiber | Media Converter2 | Fiber Port | | Media Converter2 | Fiber Port | Copper Straight-through | Router1 | Fa0/0 (Copper) | media converter in cisco packet tracer link
Objective: Ping from Router0 to Router1 across a fiber link that uses media converters at both ends.
When building a media converter simulation, users often encounter these errors:
| Mistake | Symptom | Solution |
| :--- | :--- | :--- |
| Using the wrong cable type | The link light on the media converter stays orange/red. | Delete the cable. Use Copper Straight-Thread for RJ45 and Fiber for the SFP side. |
| Mismatched SFP types | Fiber link down. | On the switch’s physical tab, ensure the inserted SFP matches the media converter's fiber spec (e.g., LX vs SX). |
| Forgetting no shutdown | Line protocol is down. | Manually type no shutdown on both switch interfaces connected to the converter. |
| VLAN mismatch | Ping fails despite link lights green. | Ensure both switch interfaces (Fa0/1 on 2960 and Gi0/1 on 3560) are in the same VLAN or both in trunk mode. |
| Distance limit ignored | Signal degradation (rare in PT but modeled). | Keep fiber links under 500m in the simulation for SX, and under 10km for LX. |
Since media converters are Layer 1 transparent, they do not have IP addresses. Configure the routers: Because the media converter is Layer 1, you
Router0:
enable
configure terminal
interface fastEthernet 0/0
ip address 192.168.1.1 255.255.255.0
no shutdown
end
Router1:
enable
configure terminal
interface fastEthernet 0/0
ip address 192.168.1.2 255.255.255.0
no shutdown
end
Many students wonder, "Why not just use a copper port on a switch?" Here are three valid reasons to use a media converter in your Packet Tracer topology:
One of the most powerful uses of a media converter in Cisco Packet Tracer link designs is carrying Trunk links (802.1Q VLANs) between buildings. If you try to drag a copper cable
Suppose Switch 2960 has VLAN 10 (Sales) and VLAN 20 (Engineering). You want Switch 3560 to carry the same VLANs. Follow the same physical setup, but change the switch configuration:
On Switch 2960 (Copper -> Media Converter):
interface fastEthernet 0/1
switchport mode trunk
switchport trunk allowed vlan 10,20
On Switch 3560 (Fiber -> Media Converter):
interface gigabitEthernet 0/1
switchport mode trunk
switchport trunk allowed vlan 10,20
The media converter does not need to know about VLANs. Because it operates at Layer 1, it blindly forwards the electrical (copper) and optical (fiber) signals, including the VLAN tags inside the Ethernet frames. This works flawlessly in Packet Tracer.