Span port configuration. A destination port cannot be an EtherChannel group. Step-by-step CLI examples, troubleshooting tips, and best practices for network monitoring. Apr 23, 2025 · A switched port analyzer (SPAN) is a network montioring feature to analyze traffic between ports on Cisco NX-OS devices by directing the SPAN session traffic to a destination port with an external analyzer attached to it. Previously, SPAN was Aug 28, 2025 · This article explains how to set up SPAN (Port Mirroring) using ports associated with the underlying switch chip/driver. This allows you to forward traffic and monitor it. Nov 30, 2024 · Cisco swtiches let you copy traffic streams for analysis, but you need to set up the facility first. Learn how to set up both local and Sep 28, 2016 · Configuring SPANSPAN Configuration Examples Example: Configuring Local SPAN This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination port. in the Port Management - Port Settings options, we have added the descriptions of Monitor Port to make it easier to identify. It provides the ability to utilize VLAN and a physical port as a source and destination when configuring RSPAN sessions between switches along with VLAN filters For SPAN destinations, you can configure physical interfaces, LAG, or port-channels with manual trunks (with no protocols). Secondly, if this port has multicast audio on it, the captures will be quite large. The total number of active sessions depends on your configuration. This sends a copy of the traffic to another port on the switch that has been connected to a SwitchProbe device, another Remote Monitoring (RMON) probe or security device. Remote VLAN: Is the destination port on a different device than the source port (relevant to RSPAN) Jan 24, 2022 · I am setting a mirror/span port to capture traffic on a 6807 switch. Scope FortiGate, SPAN (Port Mirroring). Aug 3, 2025 · Learn how to configure SPAN, RSPAN, and ERSPAN for port mirroring on Cisco switches. Any port configured as a src-ingress or src-egress port in one mirror cannot be configured as a destination port in another mirror. This capability is crucial for both troubleshooting and ensuring optimal network performance. Focusing on Cisco switches, especially the popular Cisco 9300 model, this guide will walk you through the Jun 22, 2009 · Resolution You can analyze network traffic passing through ports by using Switched Port Analyzer (SPAN). The SPAN or mirror port permits the copying of traffic from other ports on the switch. Jun 4, 2011 · Always set the destination port before setting the src-ingress or src-egress ports. You can choose the SPAN traffic in the ingress direction Jul 31, 2020 · Configuring SPAN and RSPAN SPAN Configuration Guidelines RSPAN Configuration Guidelines FSPAN and FRSPAN Configuration Guidelines SPAN Configuration Guidelines To remove a source or destination port or VLAN from the SPAN session, use the no monitor session session_number source interface interface-id {interface interface-id | vlan vlan-id} global configuration command or the no monitor session Dec 13, 2024 · Local Interface: The destination port is on the same device as the source ports (relevant to SPAN). About SPAN Prerequisites Jul 31, 2019 · Configuration Examples for SPAN and RSPAN The following sections provide configuration examples for SPAN and RSPAN Example: Configuring Local SPAN Examples: Creating an RSPAN VLAN Example: Configuring Local SPAN This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination port. First, any existing SPAN configuration for session 1 is deleted, and then bidirectional traffic is mirrored from source Gigabit Ethernet port 1 to destination Gigabit Ethernet port 2, retaining the encapsulation May 1, 2024 · Switch Port Analyzer (SPAN) ports are essential tools in network traffic monitoring, allowing network engineers and IT professionals to observe traffic as it passes through devices on the network. However, when you enter the Learn how to configure Cisco SPAN for network traffic monitoring and enhance your network security with Forescout's detailed guide. SPAN also does not normally monitor bridge protocol data unit (BPDU) packets and Layer 2 protocols, such as Cisco Discovery Protocol (CDP), VLAN Trunk Protocol (VTP), Dynamic Trunking Protocol (DTP), Spanning Tree Protocol (STP), and Port Aggregation Protocol (PAgP). Find out how to use the SPAN port for packet sniffing. The maximum number of supported SPAN sessions is 512 per device. The network analyzer can be a Cisco SwitchProbe, a Fibre Channel Analyzer, or other Remote Monitoring (RMON) probes. The Cisco Nexus 5000 Series switch supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VLANs, and VSANs as SPAN sources. The Switch Port Analyzer (SPAN) feature is now available for hardware switch interfaces on FortiGate models with built-in hardware switches (for example, the FortiGate-100D, 140D, and 200D etc. Aug 30, 2024 · This document describes the recent features of the Switched Port Analyzer (SPAN) that have been implemented. For SPAN sources, you can monitor traffic for a single port or VLAN or a series or range of ports or VLANs for each session. SPAN mirrors receive or The default configuration for local SPAN session ports is to send all packets untagged. 1Q encapsulation and This article discusses about the Cisco Switched Port Analyzer (SPAN) port feature, and its configuration and verification commands. I setup the span part using the commands below but do i have to configure anything on the actual interfaces? I am assuming I would setup the source port as an access vlan port just like I would any other port with a network host Apr 15, 2025 · Enhanced Tooling and Visibility RSPAN & VLAN Based SPAN: this feature enhances the current Traffic Mirroring feature by making it more robust and scalable when spanning a session from one switch to another for analyzing port traffic. May 2, 2024 · Learn how to configure SPAN ports on Cisco switches with our comprehensive guide. This provides application visibility within the network without being in the flow of network traffic. First, any existing SPAN configuration for session 1 is deleted, and then SPAN sources refer to the interfaces from which traffic can be monitored. com Sep 16, 2025 · Designate the destination port" destination interface interface_type {list(,) or give range(-) of interfaces} both Example: destination interface gigabitethernet 2/4 Enable the SPAN session" no shutdown Complete Example: Switch# configure terminal Switch(config)# monitor session 1 type local Switch(config-mon-local)# source interface This tutorial explains how to configure SPAN and RSPAN on Cisco Catalyst Switches. Configuring SPAN The Switched Port Analyzer (SPAN) feature (sometimes called port mirroring or port monitoring) selects network traffic for analysis by a network analyzer. Limitations Of SPAN On Cisco Catalyst Models Following are the limitations of SPAN on various Cisco Catalyst switches: Cisco Catalyst 2950 switches are only able to have one SPAN session active at a time and can monitor source ports. A source session is either a local SPAN session or an RSPAN source session. How to set up span port configuration? Read this and more design and config manuals for router and switch configurations. Understand the essentials of SPAN technology, setup proced Dec 13, 2024 · Once you configure a port as a SPAN, you will lose access to it for configuration purposes. With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. Solution The Switch Port Analyzer (SPAN) feature is now available for Hardware Switch interfaces on FortiGate models with built-in hard 6 days ago · A destination port cannot be a source port. Introduction The Switched Port Analyzer (SPAN) feature, sometimes called port mirroring or port monitoring, selects network traffic for analysis by a network analyzer such as a SwitchProbe device or other Remote Monitoring (RMON) probe. ). You can define the sources and destinations to monitor in a SPAN session on the local device. Jun 20, 2017 · This example shows how to remove any existing configuration on SPAN session 2, configure SPAN session 2 to monitor received traffic on Gigabit Ethernet source port 1, and send it to destination Gigabit Ethernet port 2 with the same egress encapsulation type as the source port, and to enable ingress forwarding with IEEE 802. You cannot mix source ports and source VLANs within a single SPAN session. May 1, 2024 · Master the step-by-step process of configuring SPAN ports on Cisco switches with our comprehensive guide. See full list on networkstraining. By dedicating an interface on the firewall as a tap mode interface and connecting it with a switch SPAN port, the switch SPAN port provides the firewall with the mirrored traffic. ab9hqk brgd7r cs3ssp n7lgr oda t5v57i k5dgzb wawp6ud oqc to