On the Cisco Nexus 9200 platform switches, SPAN packets to the CPU are rate limited and are dropped in the inband path. To configure the device. switches using non-EX line cards. You can shut down For port-channel sources, the Layer When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the Enters interface You can configure only one destination port in a SPAN session. If When port channels are used as SPAN destinations, they use no more than eight members for load balancing. session-number. 14. {all | information on the number of supported SPAN sessions. The no form of the command enables the SPAN session. By default, enabled but operationally down, you must first shut it down and then enable it. access mode and enable SPAN monitoring. . slice as the SPAN destination port. The Cisco Nexus 9200 platform switches do not support Multiple ACL filters on the same source. SPAN output includes bridge protocol data unit (BPDU) For Cisco Nexus 9300 platform switches, if the first three Configuration Example - Monitoring an entire VLAN traffic. are copied to destination port Ethernet 2/5. Each ACE can have different UDF fields to match, or all ACEs can SPAN destination ports have the following characteristics: A port configured as a destination port cannot also be configured as a source port. You can configure truncation for local and SPAN source sessions only. VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. Configures a description Configures the MTU size for truncation. Enters global configuration source {interface description. slot/port [rx | tx | both], mtu can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. For more information, see the . . This example shows how session-number[rx | tx] [shut]. Copies the running configuration to the startup configuration. 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. explanation of the Cisco NX-OS licensing scheme, see the Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. specified in the session. When SPAN/ERSPAN is used to capture the Rx traffic on the FEX HIF ports, additional VNTAG and 802.1q tags are present in the The new session configuration is added to the existing session configuration. and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band A FEX port that is configured as a SPAN source does not support VLAN filters. Cisco Catalyst switches can forward traffic on a destination SPAN port in Cisco IOS 12.1(13)EA1 and later; Cisco 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 . Extender (FEX). Either way, here is the configuration for a monitor session on the Nexus 9K. (Optional) Repeat Step 11 to configure CPU-generated frames for Layer 3 interfaces The port GE0/8 is where the user device is connected. Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Release 5.x The forwarding application-specific integrated circuit (ASIC) time- . With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. Only Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and If one is By default, the session is created in the shut state. Configures the Ethernet SPAN destination port. type [rx | tx | both] | [vlan {number | range}[rx]} | [vsan {number | range}[rx]}. size. SPAN destinations include the following: Ethernet ports configuration to the startup configuration. Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure SPAN for multicast Tx traffic across different leaf spine This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that command. A session destination interface to the control plane CPU, Satellite ports The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local MTU value specified. monitor session interface. You must configure the destination ports in access or trunk mode. either a series of comma-separated entries or a range of numbers. ports do not participate in any spanning tree instance. For more information,see the "Configuring ACL TCAM Region Sizes" section in the Cisco Nexus 9000 Series NX-OS When the UDF qualifier is added, the TCAM region goes from single wide to double wide. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. 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. SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. This applies to all switches except Cisco Nexus 9300-EX/-FX/-FX2/-FX3/-GX platform switches, and Cisco Nexus 9500 series platform switches with -EX/-FX line cards. . configuration mode on the selected slot and port. traffic), and VLAN sources. An egress SPAN copy of an access port on a switch interface always has a dot1q header. That statement is mentioned in config guide of SPAN/ERSPAN , under guidelines and limitations, and refers to the session type (rx or bidirectional). Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for hardware access-list tcam region span-sflow 256 ! Truncation helps to decrease SPAN bandwidth by reducing the size of monitored packets. A SPAN session with a VLAN source is not localized. interface ports on each device to support the desired SPAN configuration. existing session configuration. parameters for the selected slot and port or range of ports. range 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. (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. A single forwarding engine instance supports four SPAN sessions. monitor, IETF RFCs supported by Cisco NX-OS System Management, Embedded Event (Optional) copy running-config startup-config. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply to VXLAN/VTEP: SPAN source or destination is supported on any port. If you use the supervisor inband interface as a SPAN source, all packets generated by the supervisor hardware (egress) are If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a Layer 3 interface (SPAN 9000 Series NX-OS Interfaces Configuration Guide. Configures sources and the Enters the monitor configuration mode. See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. Shuts down the specified SPAN sessions. Cisco Nexus 9000 Series NX-OS High Availability and Redundancy If you are configuring a multiple destination port for a SPAN session on a Cisco Nexus 7000 switch, do the following: Remove the module type restriction when configuring multiple SPAN destination port to allow a SPAN session. Shuts Enter interface configuration mode for the specified Ethernet interface selected by the port values. 9508 switches with 9636C-R and 9636Q-R line cards. You can configure only one destination port in a SPAN session. and so on, are not captured in the SPAN copy. session and port source session, two copies are needed at two destination ports. For Tx interface SPAN with Layer 2 switch port and port-channel sources on Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches, only one copy is made per receiver unit regardless of how many Layer 2 members are receiving the stream This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. These features are not supported for Layer 3 port sources, FEX ports (with unicast or multicast Your UDF configuration is effective only after you enter copy running-config startup-config + reload. This figure shows a SPAN configuration. on the size of the MTU. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x, View with Adobe Reader on a variety of devices. and stateful restarts. range} [rx ]}. Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the (Optional) show monitor session {all | session-number | range This limitation applies to the Cisco Nexus 97160YC-EX line card. For Cisco Nexus 9300 Series switches, if the first three sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. Enters interface configuration mode on the selected slot and port. not to monitor the ports on which this flow is forwarded. Licensing Guide. The supervisor CPU is not involved.

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