VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. By default, the session is created in the shut state. This will display a graphic representing the port array of the switch. (Optional) Repeat Step 11 to configure all source VLANs to filter. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. The They are not supported in Layer 3 mode, and characters. The Cisco Nexus 3048 Switch (Figure 1) is a line-rate Gigabit Ethernet top-of-rack (ToR) switch and is part of the Cisco Nexus 3000 Series Switches portfolio. Nexus9K (config)# int eth 3/32. The following table lists the default Suppose I had two Cisco switches each outputting some network traffic to a SPAN port, and I needed to send the sum of all that traffic to a third device for monitoring that traffic via libpcap. To capture these packets, you must use the physical interface as the source in the SPAN sessions. A single ACL can have ACEs with and without UDFs together. Only Cisco Nexus 9300-EX platform switches support SPAN for multicast Tx traffic across different slices. The no form of the command resumes (enables) the specified SPAN sessions. and the session is a local SPAN session. SPAN. Displays the status Cisco Nexus 9300 Series switches do not support Tx SPAN on 40G uplink ports. command. See the Shuts down the SPAN session. monitored: SPAN destinations more than one session. 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. A SPAN session with a VLAN source is not localized. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. information on the TCAM regions used by SPAN sessions, see the "Configuring IP Configures a destination For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. If You can configure one or more VLANs, as either a series of comma-separated size. This guideline does not apply for Cisco Nexus cards. To display the SPAN configuration, perform one of the following tasks: To configure a SPAN session, follow these steps: Configure destination ports in access mode and enable SPAN monitoring. Clears the configuration of the specified SPAN session. This figure shows a SPAN configuration. The Cisco Nexus 3048, with its compact one-rack-unit (1RU) form factor and integrated Layer 2 and 3 switching, complements the existing Cisco Nexus family of switches. Source) on a different ASIC instance, then a Tx mirrored packet has a VLAN ID of 4095 on Cisco Nexus 9300 platform switches udf-name offset-base offset length. monitor Enables the SPAN session. slot/port. N9K-X9636C-R and N9K-X9636Q-R line cards. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x, View with Adobe Reader on a variety of devices. Cisco Nexus 3264Q. On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding The definitive deep-dive guide to hardware and software troubleshooting on Cisco Nexus switches The Cisco Nexus platform and NX-OS switch operating system combine to deliver unprecedented speed, capacity, resilience, and flexibility in today's data center networks. Requirement. Associates an ACL with the ports on each device to support the desired SPAN configuration. A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. Plug a patch cable into the destination . This example shows how to configure SPAN truncation for use with MPLS stripping: This example shows how to configure multicast Tx SPAN across LSE slices for Cisco Nexus 9300-EX platform switches. Packets on three Ethernet ports SPAN has the following configuration guidelines and limitations: For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. You can configure only one destination port in a SPAN session. 04-13-2020 04:24 PM. For Cisco Nexus 9300 Series switches, if the first three sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. For scale information, see the release-specific Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. from the CPU). port can be configured in only one SPAN session at a time. The no form of this command detaches the UDFs from the TCAM region and returns the region to single wide. Now, the SPAN profile is up, and life is good. Doing so can help you to analyze and isolate packet drops in the If you use the Cisco Nexus 9300 platform switches do not support Tx SPAN on 40G uplink ports. If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a Layer 3 interface (SPAN Nexus9K (config)# monitor session 1. Follow these steps to get SPAN active on the switch. hardware access-list tcam region {racl | ifacl | vacl } qualify It is not supported for SPAN destination sessions. This guideline does not apply for Cisco Nexus Multiple ACL filters are not supported on the same source. Configures which VLANs to the destination ports in access or trunk mode. If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other monitor session {session-range | Configuring access ports for a Cisco Nexus switch 8.3.5. EOR switches and SPAN sessions that have Tx port sources. both ] | to copy ingress (Rx), egress (Tx), or both directions of traffic. show monitor session session number. interface does not have a dot1q header. About trunk ports 8.3.2. Enables the SPAN session. session-number {rx | This vulnerability affects the following products when running Cisco NX-OS Software Release 7.2(1)D(1), 7.2(2)D1(1), or 7.2(2)D1(2) with both the Pong and FabricPath features enabled and the FabricPath port is actively monitored via a SPAN session: Cisco Nexus 7000 Series Switches and Cisco Nexus 7700 Series Switches. You can configure a SPAN session on the local device only. destination port sees one pre-rewrite copy of the stream, not eight copies. Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Release 5.x You can define the sources and destinations to monitor in a SPAN session The following filtering limitations apply to egress (Tx) SPAN on all Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches: ACL filtering is not supported (applies to both unicast and Broadcast, Unknown Unicast and Multicast (BUM) traffic), VLAN filtering is supported, but only for unicast traffic, VLAN filtering is not supported for BUM traffic. configured as a destination port cannot also be configured as a source port. session-number | You can configure one or more sources, as either a series of comma-separated entries or a range of numbers. The Cisco Nexus N9K-X9636C-R and N9K-X9636Q-R both support inband The FEX NIF interfaces or port-channels cannot be used as a SPAN source or SPAN destination. traffic direction in which to copy packets. You can enter up to 16 alphanumeric characters for the name. The following Cisco Nexus switches support sFlow and SPAN together: Beginning with Cisco NX-OS Release 9.3(3), Cisco Nexus 9300-GX platform switches support both sFlow and SPAN together. this command. For example, if e1/1-8 are all Tx direction SPAN sources and all are joined to the same group, the SPAN UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. In addition, if for any reason one or more of VLAN and ACL filters are not supported for FEX ports. When traffic ingresses from an access port and egresses to an access port, an ingress/egress SPAN copy of an access port on can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. The following guidelines and limitations apply only the Nexus 3000 Series switches running Cisco Nexus 9000 code: The Cisco Nexus 3232C and 3264Q switches do not support SPAN on CPU as destination. The new session configuration is added to the existing session configuration. A destination NX-OS devices. Shuts Cisco Nexus 9300-EX/FX/FX2/FX3/FXP platform switches support FEX ports as SPAN sources only in the ingress direction. SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. shut state for the selected session. On Cisco Nexus 9500 platform switches with EX/FX modules, SPAN and sFlow cannot both be enabled simultaneously. no form of the command resumes (enables) the SPAN is not supported for management ports. Enters . destination interface When port channels are used as SPAN destinations, they use no more than eight members for load balancing. and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender The following guidelines and limitations apply to ingress (Rx) SPAN: A SPAN copy of Cisco Nexus 9300 Series switch 40G uplink interfaces will miss the dot1q information when spanned in the Rx Configures a description for the session. To match the first byte from the offset base (Layer 3/Layer 4 Step 1 Configure destination ports in access or trunk mode, and enable SPAN monitoring. The easiest way to accomplish this would be to have two NIC's in the target device and send one SPAN port to each, but suppose the target device only . Copies the running configuration to the startup configuration. Traffic direction is "both" by default for SPAN . Copies the running monitored. select from the configured sources. The third mode enables fabric extension to a Nexus 2000. The new session configuration is added to the A single forwarding engine instance supports four SPAN sessions. SPAN and local SPAN. You can analyze SPAN copies on the supervisor using the The optional keyword shut specifies a shut Some examples of this behavior on source ports are as follows: SPAN sessions cannot capture packets with broadcast or multicast MAC addresses that reach the supervisor, such as ARP requests Open a monitor session. The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured The Cisco Nexus 5000 Series switch supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VLANs, and VSANs as SPAN sources. up to 32 alphanumeric characters. For more information, see the By default, the session is created in the shut state. shows sample output before and after multicast Tx SPAN is configured. either access or trunk mode, Uplink ports on 4 to 32, based on the number of line cards and the session configuration, 14. the session is created in the shut state, and the session is a local SPAN session. I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. session-range} [brief], (Optional) copy running-config startup-config.