What is VLAN remote span?
A remote SPAN (RSPAN) is sourced in the same manner as a traditional SPAN, either from individual ports or all ports in a VLAN. An RSPAN consumes one SPAN session in the same way that a local SPAN does, however, the RSPAN uses a VLAN for a destination instead of an interface.
What is the show command for VLAN?
Displaying a switch VLAN configuration. The show vlans command lists the VLANs currently running in the switch, with VID, VLAN name and VLAN status. Dynamic VLANs appear only if the switch is running with GVRP enabled and one or more ports has dynamically joined an advertised VLAN.
What is SPAN configuration?
Cisco Catalyst Switches have a feature called SPAN (Switch Port Analyzer) that lets you copy all traffic from a source port or source VLAN to a destination interface. This is very useful for a number of reasons: Redirect all traffic from a VLAN to an IDS / IPS.
What is SPAN mode?
The SPAN mode is a unique mode for a TAP that takes the SPAN or mirrored output from a network switch or router into the A port and can replicate all the traffic it receives and send it out ports B, and/or C and/or D of the TAP.
How do I assign a VLAN to an IP address?
Here are the steps to configure an IP address under VLAN 1:
- enter the VLAN 1 configuration mode with the interface vlan 1 global configuration command.
- assign an IP address with the ip address IP_ADDRESS SUBNET_MASK interface subcommand.
- enable the VLAN 1 interface with the no shutdown interface subcommand.
What command takes you into this configuration mode switch VLAN?
Adding a VLAN Directly and Entering into VLAN Configuration Mode
| Step | Actions | Commands |
|---|---|---|
| 1 | Enter global configuration mode. | switch#configure terminal |
| 2 | Enter VLAN configuration mode and/or create a VLAN. | switch(config)#vlan vlan-id |
| 3 | Configure a name for the VLAN. | switch(config-vlan)#name name |
What commands are we going to use to add an interface to a VLAN?
To add a VLAN and enter config-VLAN submode on a switch, use the vlan command in global configuration mode. To name a VLAN on a switch, use the name command in VLAN configuration mode. To set the interface type, use the switchport mode command in interface configuration mode.
What is VLAN in IP address?
A VLAN (Virtual Local Area Network) is its own logically segregated broadcast domain. You assign networks, or subnets, just as you would with a physically separated broadcast domain. VLANs do not really have IP addresses assigned to them.
How do I find the VLAN port?
Use the show vlan command to verify your VLAN configuration. This command displays all switchports and their associated VLAN as well as the VLAN status and some extra parameters that relate to Token Ring and FDDI trunks. You can use the show vlan id [vlan#] command to see information about a particular VLAN.
What does remote-span VLAN do on RSPAN VLAN?
All traffic in the RSPAN VLAN is always flooded. No MAC address learning occurs on the RSPAN VLAN. RSPAN VLAN traffic only flows on trunk ports. RSPAN VLANs must be configured in VLAN configuration mode by using the remote-span VLAN configuration mode command.
What do you need to know about RSPAN configuration?
Basic RSPAN configuration RSPAN (Remote SPAN) feature allows traffic that is sourced from a switch to be mirrored to a remote switch within a layer 2 network over trunk ports. To accomplish this you will have to configure the destination VLAN across the entire path between the switches.
How is VLAN-based span used to analyze network traffic?
You can use VLAN-based SPAN (VSPAN) to analyze the network traffic in one or more VLANs. You can configure VSPAN in a bidirectional mode (ingress and egress). All the ports in the source VLANs become operational source ports for the VSPAN session.
What does span mean on a Cisco router?
SPAN Sessions SPAN sessions (local or remote) allow you to monitor traffic on one or more ports, or one or more VLANs, and send the monitored traffic to one or more destination ports. A local SPAN session is an association of a destination port with source ports or source VLANs, all on a single network device.