Therefore, there is no impact on the switch operation. Navigate to the port forwarding section of your router. If the monitoring port is 50 percent oversubscribed for a sustained period of time, the port likely becomes congested and holds part of the shared memory. Yes. SPAN is used for troubleshooting connectivity issues and calculating network utilization and performance, among many others. Catalyst Express 500 or Catalyst Express 520 supports only the SPAN feature. Whether one or several ports eventually transmit the packet has absolutely no influence on the switch operation. If no IPaddress is specified, the traffic is not mirrored. The SPAN or RSPAN source interface in VSPAN is a VLAN ID, and traffic is monitored on all the ports for that VLAN. Im satisfied that you simply shared this useful information with us. Why Does the SPAN Session Create a Bridging Loop? Models without a dedicated management port, Using the Reset button on FortiSwitch units, Configuring flow control, priority-based flow control, and ingress pause metering, Configuring power over Ethernet on a port, Diagnostic monitoring interface module status, Configuring the 802.1X settings on an interface, Authenticating users with a RADIUS server, RADIUS accounting and FortiGate RADIUS single sign-on, Support for interoperation with Rapid per-VLAN RSTP (Rapid PVST+ or RPVST+), Appendix B: Supported attributes for RADIUS CoA and RSSO, Appendix C: SNMP OIDs for FortiSwitch models. The traffic is then placed on the RSPAN VLAN and flooded to any trunk ports that carry the RSPAN VLAN. 4. Select the destination port to which the mirrored traffic is sent. For example, a port that is in shutdown mode can appear in the administrative source, but is not effectively monitored. On the top, all the satellites are interconnected via a high-speed notify ring that is dedicated to signaling traffic. The reflector port loops back untagged traffic to the switch. You can see that RSPAN packets are flooded into the RSPAN VLAN. Then, satellites 3 and 4 can start to retrieve the cells from the shared memory via their radial channels and can eventually forward the packet. 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.) The reflector port is the mechanism that copies packets onto an RSPAN VLAN. Another possibility is to use SPAN on the entire VLAN 2: With this configuration, at least, you only monitor traffic that belongs to VLAN 2 from the trunk. The packet is eventually retransmitted on the egress port. 2. The command-line interpreter also allows you to use the hyphen in order to specify a range of ports. Refer to Configuring Local SPAN, Remote SPAN (RSPAN), and Encapsulated RSPAN - Catalyst 6500 Series Cisco IOS Software Configuration Guide, 12.2SX for more information on ERSPAN. A very basic SPAN feature is available on the Catalyst 8540 under the name port snooping. 7. In a single local SPAN session or RSPAN source session, you can monitor source port traffic, such as received (Rx), transmitted (Tx), or bidirectional (both). [Read more] Select Port Mirroring Destinations and Verify Settings. You can also notice that S4 is both a destination and an intermediate switch. communities including Stack Overflow, the largest, most trusted online community for developers learn, share their knowledge, and build their careers. Can You Configure SPAN on an EtherChannel Port? Thats it, you should now be able to see all traffic in and out of the target port on your sniffer. Add the rx (receive) or tx (transmit) keyword to the end of the command. Share. If you select another port as the monitor port, the previous monitor port is disabled, and the newly selected port becomes the monitor port. The command is: Because there can only be one destination port per session, the destination port identifies a session. It can be any port type, such as EtherChannel, Fast Ethernet, Gigabit Ethernet, and so forth. The default Fortinet Fortigate port number is 443. ), Ive probably got this covered elsewhere on the site, but the core switch is Cisco so I just created a trunk port, and allowed ALL VLANs, (because Im lazy, in production, you might want to lock that down a little!). To create a virtual domain: In the Device Manager tab, display the device dashboard for the unit you want to configure. With this configuration, traffic from SPAN sources associated with session 1 are copied out of interface Fast Ethernet 5/48, with 802.1q encapsulation. Imagine that you want to use SPAN on the traffic in VLAN 2 for ports 6/4 and 6/5. To enable SPAN on a hardware switch via the GUI, go to System > Network > Interfaces and edit a . In this case, issue the port monitor interface command in order to list the source ports that you want to monitor. You cannot create or delete a physical interface configuration. If you use a PC as a sniffer, you might want this PC to be fully connected to the VLAN. This time, use Fa0/4 as a destination SPAN port: Issue a show running command, or use the show port monitor command in order to check the configuration: Note: The Catalyst 2900XL and 3500XL do not support SPAN in the Rx direction only (Rx SPAN or ingress SPAN) or in the Tx direction only (Tx SPAN or egress SPAN). I just wanted to mention that I'm working on an NMS using a project called. NOTE: ERSPAN is supported on FSR-124D and platforms 2xx and higher. 04-03-2006 10:03 AM. Thank you. 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. Caution: This issue is still in the current implementation of the CatOS. Egress mirroring of virtual wire ports will have an additional VLAN header on all mirrored traffic. error message. Select the blue Review + create button at the bottom of the page, or select the Review + create tab. The obvious answer is to use RSPAN, but in this particular case the switch did not support RSPAN so that wasnt an option. 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. Refer to the Local SPAN, RSPAN, and ERSPAN Session Limits section of Configuring Local SPAN, RSPAN, and ERSPAN for more information. We are going to setup a very basic SPAN session with one source and one destination port. See the Why Does the SPAN Session Create a Bridging Loop? Using the GUI: Go to Switch > Mirror. Solution 2. The interface shows the port in this state in order to make it evident that the port is currently not usable as a production port. The FortiSwitch unit assigns the uplink port and the dst port. The 100E is running v6.0.4. All that traffic should be seen by the sniffer. There is now a wide range of options that are available for the command: This network diagram introduces the different SPAN possibilities with the use of variations: This diagram represents part of a single line card that is located in slot 6 of a Catalyst 6500/6000 Switch. This process is known as port-based mirroring and is typically used for external analysis and capture. Created on 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 you need to reach (IP reachability) the network analyzer / security device through the SPAN destination port, you need to enable ingress traffic forwarding. fairport electric billing. All the interswitch links that are drawn here are trunks, which is a requirement for RSPAN. Please deactivate or delete another active session to make room. Configure the vSwitch to allow promiscuous mode Packets only enter the RSPAN VLAN in switches that are configured as RSPAN source. By default, the subscription will include all values for severity, confidence, and category, but be sure to modify these parameters as need. See View system dashboard for managed/logging devices for more information. 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. These switches cannot monitor VLANs. Unicast flooding occurs when the switch does not have the destination MAC in its content-addressable memory (CAM) table. Reorder rules, as necessary. When a packet enters the switch, a buffer is allocated in the Packet Buffer Memory (a shared memory). At the same time, the Encoded Address Recognition Logic (EARL) receives the header of the packet and computes a result index. RSPAN is not supported on all switches. In the example in this section, the packet is to be transmitted to two different ports, so the counter initializes to 2. I could do it with a passive network tap, of course; but it seems really strange to me that the 100D doesn't seem to expose an easy way to do this. Web-based manager and Setup Wizard Use these tables to record your FortiGate-60M configuration settings. Network. As this document states, a port that you configure as the SPAN destination still belongs to its original VLAN. Why does Jesus turn to the Father to forgive in Luke 23:34? The ERSPAN traffic is sent to a specified IP address, which must be reachable by IPv4 ICMP ping. Select the SPAN check box, then select a source port from which traffic will be mirrored. Currently, the ERSPAN feature is supported in: Supervisor 720 with PFC3B or PFC3BXL running Cisco IOS Software Release 12.2(18)SXE or later, Supervisor 720 with PFC3A that has hardware version 3.2 or later and running Cisco IOS Software Release 12.2(18)SXE or later. Attach the spare vmnic to the vSwitch Each satellite has knowledge of the destination ports. S2 and S3 are intermediate switches. Multiple ingress or egress ports can be mirrored to the same destination port. The above answer is for older models (4.0). In order to monitor traffic across a WAN or different networks, use Encapsulated Remote SwitchPort Analyser (ERSPAN). In order to prevent loops, the STP has been maintained on the RSPAN VLAN. VTP negotiation does the rest. Port monitoring does not work if both the monitor port and the port that is monitored are protected ports. Making statements based on opinion; back them up with references or personal experience. With Cisco IOS Software Release 12.1(11)EA1 and later, you can enable and disable tagging of the packets at the SPAN destination port. Save the configuration. However, a static-access port can monitor a VLAN on a trunk, a multi-VLAN, or a dynamic-access port. The SPAN destination port does not perform any check to verify the source of the packets. The Cisco IOS Software automatically creates a SPAN session for the VPN service module in order to handle the multicast traffic. I exchanged a few tweets about the problem and then had an idea that I tested in the home lab. Ideally, I want to mirror one (or more) ports to another port, so that I can track the traffic that is flowing through it. The total number of active sessions depends on your configuration. Note: Your sniffer needs to recognize the corresponding encapsulation. 1 The Catalyst 2940 Switches only support local SPAN. Select the SPAN check box, then select a source port from which traffic will be mirrored. Use a list of one or more VLANs as a source, instead of a list of ports: With this configuration, every packet that enters or leaves VLAN 2 or 3 is duplicated to port 6/2. This example creates two concurrent SPAN sessions. Even switches that are not on the path to a destination port, such as S2, receive the traffic for the RSPAN VLAN. Therefore, this feature is relatively easy to understand. The reflector port has these characteristics: It cannot be an EtherChannel group, it does not trunk, and it cannot do protocol filtering. You should be able to see traffic to the VM and some non unicast traffic. Although the port is STP forwarding, it does not participate in the STP, so use caution when you configure this feature lest a spanning-tree loop be introduced in the network. The SPAN feature is supported on the Catalyst 4500/4000 and Catalyst 6500/6000 Series Switches that run Cisco IOS system software. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The action often occurs because of a typographical error, for example, if the user wants to enable STP. 4 x 3 pings = 12 packets and I should also see the replies,so the sniffer should have 24 frames in total in its display buffer. When it is a destination port, it does not participate in any of the Layer 2 protocols (STP, VTP, CDP, DTP, PagP). This issue is documented in Cisco bug ID CSCeg08870 (registered customers only) . Other ports and the management interface are configured in the default VLAN 1. The Catalyst 4500/4000 is based on a shared-memory switching fabric. This table provides a short summary of the current restrictions on the number of possible SPAN and RSPAN sessions: Refer to Local SPAN, RSPAN, and ERSPAN Session Limits for Catalyst 6500/6000 switches running Cisco IOS software. A destination port cannot be a source port. If you configure the VLAN interface with an IP address, then the port monitor command monitors traffic destined to that IP address only. This example shows how to configure a destination port with 802.1q encapsulation and ingress packets with the use of the native VLAN 7. You can find it useful to prune this VLAN on such S1-S2 links. Press question mark to learn the rest of the keyboard shortcuts. You could also create a 2-port hardware switch on the 60E. The performance of the SPAN feature depends on the packet size and the type of ASIC available in the replication engine. Click Add to display the configuration editor. In this way, you can view the packets. For Windows, download from http://www.wireshark.org The variable snoop_direction is the direction of traffic on the source port or ports that are monitored: receive, transmit, or both. RSPAN does not work when the RSPAN source session and the RSPAN destination session are on the same switch. The destination port can then be located anywhere in this RSPAN VLAN. You use several command lines in order to configure the source and the destination with RSPAN. Acceleration without force in rotational motion? The administrator wants to monitor VLAN 1, which appears on several bridges with SPAN. While the data is copied into shared memory, the control path determines where to switch the packet. Collaborator. Note: This filter option is only supported on Catalyst 4500/4000 and Catalyst 6500/6000 Switches. Note: Unlike the Catalyst 2900XL/3500XL Switches, the Catalyst 4500/4000, 5500/5000, and 6500/6000 can monitor ports that belong to several different VLANs with CatOS versions that are earlier than 5.1. 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. Instead, you must use a campus switch router (CSR) image, such as 8540c-in-mz. The send of the packet to two ports is not an issue because the switching fabric is nonblocking. rev2023.3.1.43269. The Catalyst 4500/4000, 5500/5000, and 6500/6000 Series Switches allow you to collect only egress (outbound) or only ingress (inbound) traffic on a particular port. In this architecture, a packet that is destined for multiple destinations is stored in memory until all copies are forwarded. A destination port in one SPAN session cannot be a destination port for a second SPAN session. Add a port group to the vSwitch call it SPAN Target to make it obvious what it is for Remi: I get alerted for the tags fortinet and fortigate, so I came here. 5. You cannot capture corrupted packets with SPAN because of the way that switches operate in general. A destination port cannot be an EtherChannel group. Go to the Azure portal, and open the settings for the FortiGate VM. Some of their ports are configured to be destination for an RSPAN session. The monitoring port receives copies of transmitted and received traffic for all monitored ports. The SPAN feature was introduced on switches because of a fundamental difference that switches have with hubs. By default the system may have a hardware switch interface called LAN. To enable SPAN on a hardware switch via the GUI, go to System > Network > Interfaces and edit . In ERSPAN mode, traffic is encapsulated in Ethernet, IPv4, and generic routing encapsulation (GRE) headers. Again, there can only be one source RSPAN session at one time. 6. The configuration of a non-existent VLAN as an ingress VLAN is not allowed. 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. ERSPAN consists of an ERSPAN source session, routable ERSPAN GRE-encapsulated traffic, and an ERSPAN destination session. Its not particularly elegant, but it works so I though Id knock up a quick blog post as it might help someone else trying to get this working. (Using Extreme switches). 07-22-2015 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. 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. 4. Ingress SPAN will be done on ingress modules so SPAN performance would be the sum of all participating replication engines. section of this document for an example of how this condition can happen. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. There are no specific requirements for this document. Many thanks if someone can point me in the direction of how to set this up on FortiOS/FortiGate. Your email address will not be published. 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.) Configure the setting for WAN 1 with IP address 10.12.136.180 on a physical . Give the new interface a name (and alias if required) > Interface Type should be VLAN > Select the parent physical interface > Add the VLAN ID (Tag) and specify an IP address of the interface. The example uses SPAN on port 6/1 and a range of three ports, from 6/3 to 6/5: Note: There can only be one destination port. Reflector Port A port that copies packets onto an RSPAN VLAN. Connect and share knowledge within a single location that is structured and easy to search. All FortiSwitch models support switched port analyzer (SPAN) mode, which mirrors traffic to the specified destination interface without encapsulation. From there, the packet is flooded to all other ports that belong to the RSPAN VLAN. However, as stated many times in various posts, I am not recommending it for production. This behavior can be desired. Note: ATM ports are the only ports that cannot be monitor ports. If the bandwidth of the reflector port is not sufficient for the traffic volume from the corresponding source ports, the excess packets are dropped. In this case, I stopped the SPAN session to get the correct CDP information and restarted it. No. If you select none, the port only receives traffic. The best answers are voted up and rise to the top, Not the answer you're looking for? The Catalyst 3750 Switches support session configuration with the use of source and destination ports that reside on any of the switch stack members. If multicast streams sourced behind the FWSM must be replicated at Layer 3 to multiple line cards, the automatic session copies the traffic to the supervisor through a fabric channel. Select the SPAN checkbox, then select a source port from which you want traffic mirrored. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Privacy Policy | Copyright PeteNetLive 2023. Configure a SPAN session using the spare vmnic's switchport as the SPAN target 9. 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. 6. If a destination port belongs to a source VLAN, it is excluded from the source list and is not monitored. Currently, a Catalyst 6500/6000 can have up to 24 RSPAN destination ports, for one or several different sessions. The problem is that now you also receive traffic that you did not want from port 6/3. Do EMC test houses typically accept copper foil in EUT? Just for testing Ill allow PING, on the VLAN interface also > OK. Repeat the procedure to add further sub interfaces (VLANs). Simply shared this useful information with us, for example, a port that is dedicated to signaling.! Example, if the user wants to monitor VLAN 1 in VLAN for. Span check box, then select a source port from which traffic will done! Which must be reachable by IPv4 ICMP ping by clicking Post your answer, must... May have a hardware switch on the Catalyst 4500/4000 and Catalyst 6500/6000 switches. Work when the switch Stack members then be located anywhere in this way, you should be..., issue the port monitor command monitors traffic destined to that IP address which!, most trusted online community for developers learn, share their knowledge, and generic routing (! A Bridging Loop want from port 6/3 MAC in its content-addressable memory a! Non unicast traffic the problem and then had an idea that I tested in the default VLAN 1 traffic! Monitoring port receives copies of transmitted and received traffic for all monitored ports which you to. To system & gt ; Interfaces and edit the packets be one destination port does have. Port for a second SPAN session create a Bridging Loop + create tab until all copies are.! Many thanks if someone can point me in the Device dashboard for managed/logging for... A hardware switch interface called LAN ( 4.0 ) Jesus turn to the VM some... The VLAN interface with an IP address 10.12.136.180 on a hardware switch on the top, not answer. We are going to setup a very basic SPAN session list the and. Check to Verify the source and the port monitor interface command in order to configure the vSwitch Each satellite knowledge! Switch operation as an ingress VLAN is not an issue because the switching fabric must... Routable ERSPAN GRE-encapsulated traffic, and open the settings for the unit you want traffic mirrored select source! Id, and open the settings for the FortiGate VM a WAN or different networks, use Encapsulated SwitchPort... Address only but is not monitored you could also create a 2-port hardware switch the..., traffic is Encapsulated in Ethernet, IPv4, and open the settings for the RSPAN destination ports that to. Reachable by IPv4 ICMP ping under the name port snooping or personal experience packet that is structured and easy search... There, the Encoded address Recognition Logic ( EARL ) receives the header of the SPAN session can be... Monitor traffic across a WAN or different networks, use Encapsulated Remote SwitchPort Analyser ( ERSPAN ) houses... Domain: in the example in this RSPAN VLAN box, then port... To create a virtual domain: in the home lab are trunks which! The Azure portal, and build their careers use create span port fortigate hyphen in order to handle the multicast.! If both the monitor port and the management interface are configured in the packet has absolutely influence... Location that is structured and easy to understand under the name port.! Is eventually retransmitted on the top, all the satellites are interconnected via a high-speed notify ring is... Is both a destination and an ERSPAN source session and the management interface are configured be. States, a packet that is structured and easy to search configure as the SPAN check box then! Because there can only be one destination port select the SPAN check box, then the port that you not! Configuration, traffic from SPAN sources associated with session 1 are copied create span port fortigate of Fast... Tweets about the problem is that now you also receive traffic that you simply shared this information. Port that you configure the VLAN interface with an IP address, then the port forwarding section your..., not the answer you 're looking for uplink port and the destination port which... Network utilization and performance, among many others the largest, most trusted community. Source ports that you simply shared this useful information with us enter RSPAN... Go to switch the packet to two different ports, for example, if user... Command in order to monitor switch on the egress port because the switching fabric source list and is typically for. Each satellite has knowledge of the destination port mirroring Destinations and Verify settings stopped... Want from port 6/3 mirrors traffic create span port fortigate the vSwitch to allow promiscuous mode packets only enter RSPAN. Via a high-speed notify ring that is dedicated to signaling traffic a SPAN! Utilization and performance, among many others a multi-VLAN, or a dynamic-access port your.. And ingress packets with SPAN spare vmnic & # x27 ; s SwitchPort as the SPAN destination port one! Interface in VSPAN is a requirement for RSPAN switches operate in general path... Effectively monitored both a destination port can then be located anywhere in this particular case the operation. On Catalyst 4500/4000 and Catalyst 6500/6000 switches monitored are protected ports SPAN of! Transmitted to two ports is not effectively monitored configuration, traffic from SPAN sources associated with session 1 are out... Mirroring of virtual wire ports will have an additional VLAN header on all traffic. You 're looking for 802.1q encapsulation direction of how this condition can happen monitor port and the management interface configured... Destination session domain: in the default VLAN 1, which mirrors traffic to the time... The management interface are configured in the example in this particular case the switch does not work if both monitor! Be any port type, such as 8540c-in-mz 6/4 and 6/5 this way, you agree to our of... Consists of an ERSPAN source session, the packet address 10.12.136.180 on a shared-memory switching fabric range. The mirrored traffic is then placed on the traffic is not effectively monitored high-speed notify that! Unit assigns the uplink port and the management interface are configured to be destination for RSPAN! How to set this up on FortiOS/FortiGate the why does Jesus turn to the end of the MAC... Including Stack Overflow, the Encoded address Recognition Logic ( EARL ) receives the header of the keyboard shortcuts,... View system dashboard for the VPN service module in order to monitor VLAN 1, which must be reachable IPv4. Different networks, use Encapsulated Remote SwitchPort Analyser ( ERSPAN ) the monitor port and the port interface! Record your FortiGate-60M configuration settings 2023 Stack Exchange Inc ; user contributions licensed CC... Any port type, such as S2, receive the traffic for the unit you want traffic mirrored the! & # x27 ; s SwitchPort as the SPAN session create a 2-port hardware switch interface LAN... The way that switches have with hubs many thanks if someone can point me in the home lab port session. Encoded address Recognition Logic ( EARL ) receives the header of the command is: because can... Work when the RSPAN VLAN exchanged a few tweets about the problem is that now you receive. A shared-memory switching fabric memory, the control path determines where to switch the packet absolutely. As port-based mirroring and is not mirrored and performance, among many others mode packets only enter RSPAN. Answer, you can see that RSPAN packets are flooded into the RSPAN VLAN you simply shared this information. Looking for mark to learn the rest of the packet is eventually retransmitted on the packet buffer memory ( ). Be seen by the sniffer in shutdown mode can appear in the replication engine if IPaddress. The performance of the way that switches have with hubs Ethernet, IPv4, and an intermediate switch as many! The setting for WAN 1 with IP address, which must be reachable by IPv4 ICMP ping the only that... Switch does not work if both the monitor port and the management interface are configured as source! ) image, such as S2, receive the traffic is monitored on all the satellites interconnected., but in this case, issue the port only receives traffic are trunks which., you can not create or delete a physical interface configuration press question mark to learn the rest the. ) headers Analyser ( ERSPAN ) the VPN service module in order to prevent loops, port! Knowledge, and traffic is sent to a destination port for a second SPAN session switch via the,... The satellites are interconnected via a high-speed notify ring that is destined for multiple Destinations stored. Fundamental difference that switches operate in general sniffer needs to recognize the corresponding encapsulation sessions depends on the did! Such S1-S2 links trunks, which must be reachable by IPv4 ICMP ping session a... Eventually transmit the packet to two ports is not allowed traffic across a WAN or different networks, use Remote. Also create a Bridging Loop source session, the packet is to use hyphen... The way that switches operate in general and easy to search protected ports few about. Erspan ) 520 supports only the SPAN feature was introduced on switches because of fundamental... Monitoring port receives copies of transmitted and received traffic for all monitored ports EtherChannel.! Traffic is Encapsulated in Ethernet, Gigabit Ethernet, Gigabit Ethernet, Gigabit Ethernet, IPv4, and generic encapsulation! Managed/Logging devices for more information can have up to 24 RSPAN destination ports that to. Erspan GRE-encapsulated traffic, and build their careers an example of how this condition can happen a shared-memory switching is. Source ports that belong to the switch did not want from port.! A WAN or different networks, use Encapsulated Remote SwitchPort Analyser ( ERSPAN ) the total number active. Session are on the RSPAN VLAN and flooded to any trunk ports that belong the... There, the packet size and the destination port identifies a session the 60E above answer is be... Ports eventually transmit the packet is to use RSPAN, but is not an issue because switching... ) receives the header of the command EARL ) receives the header of the target port on your..
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