Contents
How do I mirror a port to my router?
How to Configure Port Mirroring?
- Create a VLAN.
- Add the source port and destination port to VLAN.
- Configure IP address.
- Configure port mirroring on the destination port, and copy the packet from the source port to the destination port.
What is port mirroring Cisco?
Switched Port Analyzer (SPAN), which is also called port mirroring, or traffic mirroring enables you to monitor network traffic passing in, or out of, a set of ports. You can then pass this traffic to a destination port on the same router. Traffic between host A and host B is also seen on the destination port.
Can you span a router?
Cisco developed the Switched Port Analyzer (SPAN) feature to facilitate the capturing of packets. SPAN is supported on most Cisco switch platforms. SPAN works by copying the traffic from one or more source ports.
How do I configure a port SPAN on a Cisco switch?
Each SPAN session must have a destination port that receives a copy of the traffic from the source ports and VLANs. A destination port has these characteristics: A destination port must reside on the same switch as the source port (for a local SPAN session). A destination port can be any Ethernet physical port.
What kind of WAN interface does the Cisco 851 have?
The 851 and 871 are equipped with a 10/100 Ethernet WAN interface which means that your ISP should provide you with a broadband modem offering an Ethernet connection towards the customer. I’m getting a lot of questions about the interfaces of 851/871 routers and how they are arranged.
What are the ports of a Cisco router?
Ports FE0 up to FE3 under the LAN group can be used to connect internal computersor maybe to an internal switch to expand the number of internal ports (see points 1,2 in the figure above). These ports are actually Layer 2 switch ports, and not regular Layer 3 router ports.
What is Port Fe4 on a Cisco router?
Port FE4 is the WAN interface which must be connected to the ISP DSL broadband modem (see point 3 in the figure above). This port is a normal Layer 3 router port, which means you can configure IP address directly on the interface port. Default Configuration for 851 – 871 Router
How to configure a Cisco router from a command prompt?
You will get a prompt as below: Would you like to enter the initial configuration dialog [yes/no] Type noand press Enter. This will give you a command prompt (Router>) and you are ready to configure your router from scratch. Type show runto see the current configuration which looks like the following: