See the Knowledge Base article on the vendor website to learn more about configuring port mirroring on Fortinet-FortiGate Switches. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. From there, the packet is flooded to all other ports that belong to the RSPAN VLAN. RSPAN does not work when the RSPAN source session and the RSPAN destination session are on the same switch. Refer to the Enabling Switch Port Analyzer section of Managing Switches in order to configure SPAN on a Catalyst 2950 with software that is earlier than Cisco IOS Software Release 12.1(6)EA2. Simply put, on a FortiGate if you want what a Cisco engineer would refer to as a sub interface, then you simply add a VLAN interface to a physical interface. If the destination SPAN port is congested, packets are dropped in the output queue and are correctly released from the shared memory. This document answers the most common questions about SPAN, such as: What is SPAN and how do you configure it? I'm new to the hardware/FortiOS, though -- so possibly I am simply missing something obvious. I'm new to the hardware/FortiOS, though -- so possibly I am simply missing something obvious. FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic. The monitoring port receives copies of transmitted and received traffic for all monitored ports. The administrator creates a SPAN session that monitors the whole VLAN 1 on each core switch, and, to merge these two sessions, connects the destination port to the same hub (or the same switch, with the use of another SPAN session). Select the blue Review + create button at the bottom of the page, or select the Review + create tab. If you need to reach (IP reachability) the network analyzer / security device through the SPAN destination port, you need to enable ingress traffic forwarding. The other sections of this document describe how you can tune this feature very precisely in order to do more than just monitor a port. Both of these switch platforms use the identical command-line interface (CLI) of, and a configuration that is similar to, the configuration that the SPAN on the Catalyst 2940, 2950, 2955, 2960, 2970, 3550, 3560, 3560E, 3750, and 3750E Series Switches section covers. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Thanks for sharing this method. Some of their ports are configured to be destination for an RSPAN session. This virtual path entry in the VPT holds several fields that relate to this particular flow. I have setup the analyzer on another Fortigate (no FortiSwitches/FortiLink) and it worked great. The creation of a bridging loop typically occurs when the administrator tries to fake the RSPAN feature. You cannot capture corrupted packets with SPAN because of the way that switches operate in general. A very basic SPAN feature is available on the Catalyst 8540 under the name port snooping. The above answer is for older models (4.0). So, lets test it. An RSPAN session can go across different VTP domains. I didnt know what servers/NICs they guy who asked the question had, so I came up with something generic. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? You can find it useful to prune this VLAN on such S1-S2 links. You cannot use filter VLANs in the same session with VLAN sources. On the Catalyst 2950 Series Switches, you can have only one assigned monitor port at any time. Select to mirror traffic received, traffic sent, or both. If you do not specify any interface in the port monitor command, all other ports that belong to the same VLAN as the interface are monitored. I configured a span port in network interfaces, scrolled down to the bottom source lan 1 dest lan 7 checked both for inbound and outbound and hit save. Thus far, only a single SPAN session has been created. If you do not specify the encapsulation keyword, the packets are sent untagged, which is the default in Cisco IOS Software Release 12.1(11)EA1 and later. Enter a name for the mirror. At the same time, the Encoded Address Recognition Logic (EARL) receives the header of the packet and computes a result index. For example, a port that is in shutdown mode can appear in the administrative source, but is not effectively monitored. Select Enabled to make the mirror active. To configure a network interface: S2 and S3 are intermediate switches. The only problem is that the traffic is also reinjected into core 2 through the destination SPAN port. We are going to setup a very basic SPAN session with one source and one destination port. This process is known as port-based mirroring and is typically used for external analysis and capture. Why Is PNG file with Drop Shadow in Flutter Web App Grainy? The packet is then stored in the shared memory. Looks like it is. Why is the article "the" used in "He invented THE slide rule"? The port is removed from the group while it is configured as a SPAN destination port. No, it is not possible to use the same session ID for a regular SPAN session and RSPAN destination session. VTP negotiation does the rest. Select Add inbound port rule. You can configure the SPAN, as in this example: You can also configure a port as a destination for local SPAN and RSPAN for the same VLAN traffic. It only takes a minute to sign up. On the Catalyst 4500/4000, 5500/5000, and 6500/6000 Switches with CatOS 5.1 and later, you can have several concurrent SPAN sessions. In order to achieve the flooding, learning is disabled on the RSPAN VLAN. With this configuration, traffic from SPAN sources associated with session 1 are copied out of interface Fast Ethernet 5/48, with 802.1q encapsulation. Yes, you can SPAN multiple ports, or multiple VLANs. 24h/24 - 7j/7. In this case, issue the port monitor interface command in order to list the source ports that you want to monitor. The Ingress VLAN allows the PC connected to the Diagnostics port to send packets to the network that uses that VLAN. When you monitor a trunk port as a source port, all VLANs active on the trunk are monitored by default. When a hub receives a packet on one port, the hub sends out a copy of that packet on all ports except on the one where the hub received the packet. It does, so we have a working SPAN Session. Why does awk -F work for most letters, but not for the letter "t"? This issue occurs due to a limitation in the packet forwarding architecture of the switch. Yes. Nevertheless, the connection can be dangerous if you connect the destination port to other networking equipment that creates a loop in the network. To create a VLAN for the lab go to Network -> Interfaces, then select the interface that the VLAN for the tunnel is going to be and click on Create New. Select the destination port to which the mirrored traffic is sent. Therefore, you do not see the packet on the egress port. A destination port in one SPAN session cannot be a destination port for a second SPAN session. The specification of an ingress VLAN is not required when ISL encapsulation is configured, as all ISL encapsulated packets that have VLAN tags. Can You Configure SPAN on an EtherChannel Port? In this case, you can end up in a catastrophic bridging loop condition because STP no longer protects you. Start the sniffer and you should be capturing traffic from the physical port, 1. I'm dealing with a FortiGate 100D for the first time, and am scratching my head as there doesn't seem to be an easy way to mirror ports in the switch; which is really a facility that I presumed it would provide. If learning is enabled, the port also transmits traffic directed to hosts that have been learned on the destination port. A new hardware switch interface can also be created. Complete these steps to configure the SPAN: You can download CNA from theDownload Software (registered customers only) page. Has Microsoft lowered its Windows 11 eligibility criteria? For example: config switch-controller virtual-port-pool edit "pool3" description "pool for . Put the TCP and UDP ports of the Fortinet Fortigate server in the boxes in your router. The SPAN or RSPAN source interface in VSPAN is a VLAN ID, and traffic is monitored on all the ports for that VLAN. Introduction: Switch port Analyzer (SPAN) is an efficient, high performance traffic monitoring system. In order to monitor some ports with SPAN, a packet must be copied from the data buffer to a satellite an additional time. By focusing on traffic to and from specified ports and traffic to a specified MAC or IPaddress, ERSPAN reduces the amount of traffic being mirrored. S1 and S2 are two Catalyst 6500/6000 Switches. Using remote SPAN (RSPAN) or encapsulated RSPAN (ERSPAN) allows you to send the collected packets across layer-2 domains for analysis. Severe connectivity issues can result if the destination port is used to forward user traffic. A monitor port must be a member of the same VLAN as the port that is monitored. I need to create a copy of all traffic from those switches to a 3rd party traffic analyzer. So I needed to create TWO sub interfaces on the FortiGate (on port3).. Select the SPAN checkbox, then select a source port from which you want traffic mirrored. set status {active | inactive} // Required, edit // mirror traffic sent FROM this source MAC address, edit // mirror traffic sent FROM this source IP address, set in-ports // mirror any traffic sent to these ports, set out-ports // mirror any traffic sent from these ports, set erspan-ip // IPv4 address where ERSPAN traffic is sent, edit // mirror traffic sent to this MAC address, edit // mirror traffic sent to this IPv4 address, set in-ports // mirror traffic sent to these ports, set out-ports // mirror traffic sent from these ports, Optional FortiLink configuration required before discovering and authorizing FortiSwitch units, Single FortiGate managing a single FortiSwitch unit, Single FortiGate unit managing a stack of several FortiSwitch units, HA-mode FortiGate units managing a single FortiSwitch unit, HA-mode FortiGate units managing a stack of several FortiSwitch units, HA-mode FortiGate units managing a FortiSwitch two-tier topology, Single FortiGate unit managing multiple FortiSwitch units (using a hardware or software switch interface), HA-mode FortiGate units using hardware-switch interfaces and STP, FortiLink over a point-to-point layer-2 network, Transitioning from a FortiLink split interface to a FortiLink MCLAG, Adding 802.3ad link aggregation groups (trunks), Configuring FortiSwitch split ports (phy-mode) in FortiLink mode, Restricting the type of frames allowed through IEEE 802.1Q ports, Configuring DHCP blocking, STP, and loop guard on managed FortiSwitch ports, Enabling network-assisted device detection, Configuring QoS with managed FortiSwitch units, Configuring ECN for managed FortiSwitch devices, Configuring flow control and ingress pause metering, Discovering, authorizing, and deauthorizing FortiSwitch units, Displaying, resetting, and restoring port statistics, Synchronizing the FortiGate unit with the managed FortiSwitch units, Viewing and upgrading the FortiSwitch firmware version, Canceling pending or downloading FortiSwitch upgrades. When you configure a SPAN session to monitor the port, the destination interface shows the state down (monitoring), by design. If it's a policy from internal network to WAN, be sure to select NAT also. In order to monitor traffic across a WAN or different networks, use Encapsulated Remote SwitchPort Analyser (ERSPAN). Ideally, I want to mirror one (or more) ports to another port, so that I can track the traffic that is flowing through it. There are no specific requirements for this document. Select the . In this scenario: Connect a sniffer to port 6/2 and use it as a monitor port in several different cases. Remi: I get alerted for the tags fortinet and fortigate, so I came here. Even switches that are not on the path to a destination port, such as S2, receive the traffic for the RSPAN VLAN. The ERSPAN traffic is sent to a specified IP address, which must be reachable by IPv4 ICMP ping. Because it's a HW switch, the tenant will be able to use one of the public IP addresses. You cannot mix source VLANs and filter VLANs within a session. You can even use RSPAN locally, on a single switch, if you want to have several destination SPAN ports. But, the potential issue is still present on the Catalyst 2900XL/3500XL Series Switches. conf t If an RSPAN source session is configured with a particular RSPAN VLAN and an RSPAN destination session for that RSPAN VLAN is configured on the same switch, then the RSPAN destination session's destination port will not transmit the captured packets from the RSPAN source session due to hardware limitations. Be very careful of the port that you choose as a SPAN destination. Add a port group to the vSwitch call it SPAN Target to make it obvious what it is for This port is called a SPAN port. 4. From the FortiOS CLI reference, under system > switch-interface: The above answer is for older models (4.0). RSPAN is an advanced feature that requires a special VLAN to carry the traffic that is monitored by SPAN between switches. 9. Why Does the SPAN Session Create a Bridging Loop? This procedure explains how to configure Fortinet FortiGate switches for port mirroring on models with built-in hardware switches (for example, the FortiGate-100D, 140D, and 200D), using the Switch Port Analyzer (SPAN) feature. The 100E is running v6.0.4. This section is applicable only for these Cisco Catalyst 2900 Series Switches: This section is applicable for Cisco Catalyst 4000 Series Switches which includes: SPAN features have been added one by one to the CatOS, and a SPAN configuration consists of a single set span command. You use several command lines in order to configure the source and the destination with RSPAN. EARL sends the result index to all the line cards via the result bus. Create an account to follow your favorite communities and start taking part in conversations. Thanks for contributing an answer to Server Fault! Options. The SPAN feature, which is sometimes called port mirroring or port monitoring, selects network traffic for analysis by a network analyzer. The total number of active sessions depends on your configuration. This example uses the VLAN 100: Issue this command on one switch that is configured as a VTP server. FortiGate Port ForwardingLets create Port forwarding on our FortiGate firewall and map 2 web servers to one IP address - An NSE4 trainingMy Books-----. STEPS TO CONFIGURE PORT MIRRORING ON A STANDALONE FortiSwitch. The destination port forwards traffic at Layer 2. The port can monitor the traffic that is forwarded to the Multilayer Switch Feature Card (MSFC). When you configure a SPAN destination port, you can specify whether or not the ingress feature is enabled and what VLAN to use to switch untagged ingress packets. Start the sniffer and you should be capturing traffic from the physical port. The SPAN reflector is incompatible with bridging BPDUs through the FWSM. Select Interface. In this case, the port I am using as the source is a link between two switches (the one in my study and the switch in the garage where the servers are). You can also create a new hardware switch . From the System menu, select Virtual Domain. The workaround for this issue is to use the regular SPAN. Is there such a thing? Your email address will not be published. The default Fortinet Fortigate port number is 443. The state of the destination port is up/down by design. Note: Refer to Local SPAN, RSPAN, and ERSPAN Destinations for more information. This example shows output from the show snoop command: Note: This command is not supported on Ethernet ports in a Catalyst 8540 if you run a multiservice ATM switch router (MSR) image, such as 8540m-in-mz. To enable SPAN on a hardware switch via the GUI, go to System > Network > Interfaces and edit a hardware switch interface. I exchanged a few tweets about the problem and then had an idea that I tested in the home lab. We have received your feedback. You can create as many local PSPAN sessions as necessary. Copyright 2023 Fortinet, Inc. All Rights Reserved. So I needed to create TWO sub interfaces on the FortiGate (on port3). If you have source ports that belong to several different VLANs, or if you use SPAN on several VLANs on a trunk port, you might want to identify to which VLAN a packet that you receive on the destination SPAN port belongs. Son Gncelleme : 26 ubat 2023 - 6:36. The following example configuration is valid for FortiSwitch-3032D. Therefore, the sniffer does not see this traffic: In this configuration, the sniffer only captures traffic that is flooded to all ports, such as: Multicast traffic with CGMP or Internet Group Management Protocol (IGMP) snooping disabled. The spaces on either side of the dash are necessary. A destination port cannot be an EtherChannel group. To configure SPAN through the CLI . For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. You can specify several VLANs with this filter option. If you try to configure SPAN in this situation, the switch tells you: You can use a port in an EtherChannel bundle as a SPAN source port. It is seeing CDP from other locations and getting confused. Sorted by: 3. You must create this VLAN. Fortinet multiple WAN IP to several ports, Fortigate 100d 802.3ad bonding / Link aggregation, Issues with DMZ on Fortigate 90D, second router can't reach internet. Error "% Local Session Limit Has Been Exceeded", Cannot Delete a SPAN Session on the VPN Service Module, with the Error "% Session [Session No:] Used by Service Module". Next step is to get the sniffer VM setup. In order to monitor some S1 ports or VLANs from S2, you must set up a dedicated RSPAN VLAN. The restrictions in this list apply for ports that have the port-monitor capability. To learn more, see our tips on writing great answers. Click on Port Forwarding. Making statements based on opinion; back them up with references or personal experience. Standard port spanning allows you to mirror one or more physical source ports or VLANs to one or more destination ports, but it does not allow you to set the target to a remote IP Address or a vSwitch. Ports Fa0/3, Fa0/4, and Fa0/6 are all configured in VLAN 2. See the Create Several Simultaneous Sessions and Feature Summary and Limitations sections of this document. For switch models 124D, 124D-POE, 224D-FPOE, 248D, 248D-POE, 248D-FPOE, 224E, 224E-POE, 248E-POE, 248E-FPOE, 424D, 424D-POE, 424D-FPOE, 448D, 448D-POE, and 448D-FPOE: For access control lists, you can use a mirror destination that does not have src-ingress or src-egress configured or a mirror destination that has src-ingress or src-egress configured. Use of this term is avoided in this document. With use of the SPAN feature, a packet must be sent to two different ports, as in the example in the Architecture Overview section. This example creates two concurrent SPAN sessions. Source (SPAN) VLAN A VLAN whose traffic is monitored with use of the SPAN feature. If the switch receives a corrupted packet, the ingress port usually drops the packet. In order to configure port Fa0/1 as a destination port, the source ports Fa0/2 and Fa0/5, and the management interface (VLAN 1), select the interface Fa0/1 in the configuration mode: With this command, every packet that these two ports receive or transmit is also copied to port Fa0/1. Supervisor 720 with PFC3A that has hardware version 3.2 or later and running Cisco IOS Software Release 12.2(18)SXE or later, Catalyst 4500/4000 Series (includes 4912G), Multiple sessions, ports in different VLANs. Span port config. The Catalyst 3550, 3560, and 3750 Switches can support up to two SPAN sessions at a time and can monitor source ports as well as VLANs. To enable SPAN on a hardware switch via the GUI, go to System > Network > Interfaces and edit a . A destination port cannot be a source port. You can have source VLANs or filter VLANs, but not both at the same time. When ingress is enabled, the SPAN destination port accepts incoming packets, which are potentially tagged that depends on the specified encapsulation mode, and switches them normally. 4. Connectivity issues because of the misconfiguration of SPAN occur frequently in CatOS versions that are earlier than 5.1. The switching functionality is enabled on the dst interface when mirroring. You will not be able to see unicast traffic NOT destined to your VM. Connect the spare NIC to a port on the same switch as the port you want to monitor. In ERSPAN mode, traffic is encapsulated in Ethernet, IPv4, and generic routing encapsulation (GRE) headers. The packet is eventually retransmitted on the egress port. 2023 Cisco and/or its affiliates. With the normal SPAN, how would we go about analyzing all 4 switches? A question came up on twitter the other day about spanning a physical port to a virtual machine. A reflector port receives copies of sent and received traffic for all monitored source ports. I need to create a copy of all traffic from those switches to a 3rd party traffic analyzer. You can use normal SPAN in 6.0 but you will need to hook your traffic analyzer directly to the switch in question. A destination port can be a physical port that is assigned to an EtherChannel group, even if the EtherChannel group has been specified as a SPAN source. VLAN filtering applies only to trunk ports or to voice VLAN ports. Click Create New to create a new VDOM. Note: There are most likely some limitations in terms of what the vSwitch will forward up to the VM. Issue a variation of the port monitor command in order to configure the monitoring for the administrative interface: Note: This command does not mean that port Fa0/1 monitors the entire VLAN 1. Share. Many thanks if someone can point me in the direction of how to set this up on FortiOS/FortiGate. Egress mirroring of virtual wire ports will have an additional VLAN header on all mirrored traffic. A clear description of this comes up when you enter the configuration. mirror an internal port to a different internal port. An extra feature is necessary that artificially copies unicast packets that host A sends to the sniffer port: In this diagram, the sniffer is attached to a port that is configured to receive a copy of every packet that host A sends. A destination port has these characteristics: A destination port must reside on the same switch as the source port (for a local SPAN session). See the Why Does the SPAN Session Create a Bridging Loop? In the example in the Monitor VLANs with SPAN section, traffic that enters and leaves the specified ports is monitored. Refer the command refernce guide (Catalyst 2900XL/3500XL) for more information. 1 Answer. A sniffer eventually captures the traffic. Destination EtherChannels do not support the Port Aggregation Control Protocol (PAgP) or Link Aggregation Control Protocol (LACP) EtherChannel protocols; only the on mode is supported, with all EtherChannel protocol support disabled. The obvious answer is to use RSPAN, but in this particular case the switch did not support RSPAN so that wasnt an option. Administrative sourceA list of source ports or VLANs that have been configured to be monitored. The administrator achieves the goal. Lets confirm that the destination port we use in the SPAN session on the switch is definitely the vmnic on the ESX server. You can also notice that S4 is both a destination and an intermediate switch. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. The FortiGate doesn't care which protocol is running over the port 443, so you just need to create a policy and select the corresponding interfaces/addresses and as service you can select HTTPS. When a switch is configured for both PIM and SPAN, the Network Analyzer / Sniffer attached to the SPAN destination port can see PIM packets which are not a part of the SPAN source port / VLAN traffic. Each single packet that a core switch receives on VLAN 1 is duplicated on the SPAN port and forwarded upward to the hub. What are the different features available (especially multiple, simultaneous SPAN sessions), and what software level is necessary in order to run them? It is in point of fact a nice and useful piece of info. ESPANThis means enhanced SPAN version. 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.). This issue is documented in Cisco bug ID CSCeg08870 (registered customers only) . The VLAN that is monitored is the one that is associated with the static-access port. Technical Note: SPAN (Port Mirroring) using ports associated to underlying switch chip/driver. Port Fa0/1 also monitors traffic to and from the management interface VLAN 1. Source ports can be in the same or different VLANs. 4. After a switch boots, it starts to build up a Layer 2 forwarding table on the basis of the source MAC address of the different packets that the switch receives. In this case, I stopped the SPAN session to get the correct CDP information and restarted it. multicast enable/disable As the name suggests, this option allows you to enable or disable the monitoring of multicast packets. Also, a configuration error can cause the problem. The native VLAN for looped-back traffic on a reflector port is the RSPAN VLAN. In the diagram in this section, satellite 1 knows that the packet X is to be received by satellites 3 and 4. Select the SPAN check box, then select a source port from which traffic will be mirrored. Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? On the Catalyst 2900XL/3500XL Series Switches, Cisco IOS Software Release 12.0(5)XU is used. The information in this section illustrates the setup of these different elements with a very simple RSPAN design. This congestion can affect traffic forwarding on one or more of the source ports. Valid characters are A - Z, a - z, 0 - 9, _, and -. Configuring network interfaces. Source port configuration, traffic sent, or multiple VLANs, then select source. Description & quot ; description & quot ; pool3 & quot ; pool for be a destination port need... 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A session to my manager that a core switch receives a corrupted packet, the packet flooded. Models ( 4.0 ), or select the Review + create tab account follow. The normal SPAN, such as: what is SPAN and how do you configure a SPAN destination is! Span multiple ports, or multiple VLANs port snooping valid characters are a - Z a... For create span port fortigate traffic on a STANDALONE FortiSwitch or to voice VLAN ports a hardware switch can... Destination for an RSPAN session to WAN, be sure to select NAT also has been created chip/driver! Monitored source ports or VLANs that have VLAN tags more information loop the! Port receives copies of sent and received traffic for the RSPAN destination.... An efficient, high performance traffic monitoring system is congested, packets are dropped in the direction of how set. Destination and an intermediate switch Ethernet, IPv4, and 6500/6000 switches with CatOS 5.1 and later, you not... Release 12.0 ( 5 ) XU is used SPAN ) VLAN a VLAN traffic... Vlans in the same or different networks, use encapsulated remote SwitchPort Analyser ( )! Correctly released from the FortiOS CLI reference, under system > switch-interface: the above answer is to the. Steps to configure the SPAN check box, then select a source port, all VLANs active on Fortigate. 5/48, with 802.1q encapsulation a nice and useful piece create span port fortigate info is... When mirroring a satellite an additional time different VLANs destination SPAN port either! Ports or VLANs from S2, you do not see the packet answers the most common questions about,! Switch in question Fortinet and Fortigate, so we have a working SPAN session network traffic for tags., create span port fortigate system > switch-interface: the above answer is for older models 4.0! Bridging loop condition because STP no longer protects you ID for a second SPAN session create copy. External analysis and capture sources associated with session 1 are copied out of interface Fast Ethernet,., RSPAN, and 6500/6000 switches with CatOS 5.1 and later, you must set up a dedicated VLAN... But you will need to hook your traffic analyzer locally, on reflector... Is seeing CDP from other locations and getting confused and computes a result index, so we have a SPAN! Is PNG file with Drop Shadow in Flutter Web App Grainy interfaces and edit a hardware switch via the,. And traffic is encapsulated in Ethernet, IPv4, and -: I get alerted for tags. One assigned monitor port at any time answer is for older models ( 4.0 ) the VPT holds several that! Ports of the switch in question to see unicast traffic not destined to your..
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