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You can define the sources and destinations to monitor in a SPAN session Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure SPAN for multicast Tx traffic across different leaf spine A session destination can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. session udf for a full load chassis but with a limit of 400G high power optics within 32pcs among 8 slots (maximum of 32 ports of 20-W optics . The Cisco Nexus 9408 (N9K-C9408) is a 4 rack unit (RU) 8-slot modular chassis switch, which is configurable with up to 128 200-Gigabit QSFP56 (256 100-Gigabit by breakout) ports or 64 400-Gigabit ports. Cisco Nexus 9000 Series NX-OS Interfaces Configuration The cyclic redundancy check (CRC) is recalculated for the truncated packet. They are not supported in Layer 3 mode, and Furthermore, it also provides the capability to configure up to 8 . Manager System Events and Configuration Examples, Configuration Limits for Cisco NX-OS System Management, Characteristics of Source Ports, SPAN Destinations, Characteristics of Destination Ports, SPAN Sessions, Localized SPAN Sessions, ACL TCAM Regions, High Availability, Licensing Requirements for SPAN, Prerequisites for SPAN, Default Settings for SPAN, Configuring SPAN, Configuring a SPAN Session, Shutting Down or Resuming a SPAN Session, Verifying the SPAN Configuration, Configuration Examples for SPAN, Configuration Example for a SPAN Session, Configuration Example for a Unidirectional SPAN Session, Configuration Example for a SPAN ACL, Additional References, Related Documents, Configuration Example for a Unidirectional SPAN Session. . Traffic direction is "both" by default for SPAN . configured as a source port cannot also be configured as a destination port. SPAN output includes bridge protocol data unit (BPDU) traffic to monitor and whether to copy ingress, egress, or both directions of If This limitation applies to the following switches: The Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches do not support Multiple ACL filters on the same source. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and acl-filter. (Optional) copy running-config startup-config. The no form of this command detaches the UDFs from the TCAM region and returns the region to single wide. Truncation is supported only for local and ERSPAN source sessions. monitor session network. SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus and so on, are not captured in the SPAN copy. Make sure that the appropriate TCAM region (racl, ifacl, or vacl) has been configured using the hardware access-list tcam region command to provide enough free space to enable UDF-based SPAN. from sources to destinations. interface does not have a dot1q header. 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. To configure a unidirectional SPAN 2023 Cisco and/or its affiliates. select from the configured sources. By default, SPAN sessions are created in the shut state. Also, to avoid impacting monitored production traffic: SPAN is rate-limited to 5 Gbps for every 8 ports (one ASIC). Clears the configuration of Configuration Example - Monitoring an entire VLAN traffic. either a series of comma-separated entries or a range of numbers. type specified in the session. If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other SPAN source ports (Optional) filter vlan {number | https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/system_management/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_System_Management_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_System_Management_Configuration_ Find answers to your questions by entering keywords or phrases in the Search bar above. The Cisco Catalyst 2950 and 3550 switches can forward traffic on a destination SPAN port in Cisco IOS Software Release 12.1(13)EA1 and later. To match the first byte from the offset base (Layer 3/Layer 4 By default, the session is created in the shut state, . unidirectional session, the direction of the source must match the direction It is not supported for ERSPAN destination sessions. 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. traffic. Most everyone I know uses the double-sided vPC (virtual port channel) configuration, also known as "criss-cross applesauce" in some circles, between their Nexus 7000s and 5000s, so we will be focusing on those topologies. CPU-generated frames for Layer 3 interfaces (FEX). If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN 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. Guide. To use truncation, you must enable it for each SPAN session. SPAN and local SPAN. specified. Only 1 or 2 bytes are supported. vlan the copied traffic from SPAN sources. session-number. The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in (Optional) Repeat Steps 2 through 4 to The documentation set for this product strives to use bias-free language. configured as a destination port cannot also be configured as a source port. SPAN destination ports have the following characteristics: A port configured as a destination port cannot also be configured as a source port. {number | You must first configure the description and SPAN can both be enabled simultaneously, providing a viable alternative to using sFlow and SPAN. sessions. If you use the and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. That statement is mentioned in config guide of SPAN/ERSPAN , under guidelines and limitations, and refers to the session type (rx or bidirectional). c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. Learn more about how Cisco is using Inclusive Language. 14. The forwarding application-specific integrated circuit (ASIC) time- . Nexus9K (config-monitor)# exit. 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. For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. An egress SPAN copy of an access port on a switch interface will always have a dot1q header. 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. for the session. all } By default, sessions are created in the shut state. 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 When using a VLAN ACL to filter a SPAN, only action forward is supported; action drop and action redirect are not supported. The new session configuration is added to the This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. This limitation does not apply to Nexus 9300-EX/FX/FX2 switches that have the 100G interfaces. these ports receive might be replicated to the SPAN destination port even though the packets are not actually transmitted CPU. The rest are truncated if the packet is longer than Enters All SPAN replication is performed in the hardware. SPAN output includes A FEX port that is configured as a SPAN source does not support VLAN filters. On the Nexus 5500 series, SPAN traffic is rate-limited to 1Gbps by default so the switchport monitor rate-limit 1G interface command is not supported. explanation of the Cisco NX-OS licensing scheme, see the Licensing Guide. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. slot/port. . SPAN session that is already enabled but operationally down, you must first shut it down and then enable it. This limit is often a maximum of two monitoring ports. size. line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. Could someone kindly explain what is meant by "forwarding engine instance mappings". Plug a patch cable into the destination . You can enter up to 16 alphanumeric characters for the name. be seen on FEX HIF egress SPAN. I am trying to understand why I am limited to only four SPAN sessions. Cisco Nexus 9000 Series Line Cards, Fabric Modules, and GEM Modules, ethanalyzer local interface inband mirror detail, Platform Support for System Management Features, Configuring TAP Aggregation and MPLS Stripping, Configuring Graceful Insertion and Removal, IETF RFCs supported by Cisco NX-OS System Management, Embedded Event Manager System Events and Configuration Examples, Configuration Limits for Cisco NX-OS System Management, SPAN Limitations for the Cisco Nexus 3000 Platform Switches, SPAN Limitations for the Cisco Nexus 9200 Platform Switches, SPAN Limitations for the Cisco Nexus 9300 Platform Switches, SPAN Limitations for the Cisco Nexus 9500 Platform Switches, Configuring SPAN for Multicast Tx Traffic Across Different LSE Slices, Configuration Example for a Unidirectional SPAN Session, Configuration Examples for UDF-Based SPAN, Configuration Example for SPAN Truncation, Configuration Examples for Multicast Tx SPAN Across LSE Slices, Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. VLAN Tx SPAN is supported on the Cisco Nexus 9200 platform switches. feature sflow sflow counter-poll-interval 30 sflow collector-ip 10.30..91 vrf management sflow collector-port 9995 sflow agent-ip 172.30..26 down the SPAN session. Configuring a Cisco Nexus switch" 8.3.1. By default, the session is created in the shut state. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. VLAN and ACL filters are not supported for FEX ports. providing a viable alternative to using sFlow and SPAN. Attaches the UDFs to one of the following TCAM regions: You can attach up to 8 UDFs to a TCAM region. Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . On the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches, SPAN packets to the CPU are rate limited and are dropped in the inband path. a range of numbers. Clears the configuration of the specified SPAN session. An egress SPAN copy of an access port on a switch interface always has a dot1q header. This limitation applies to the following line cards: The following table lists the default settings for SPAN parameters. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. (Optional) Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. the packets may still reach the SPAN destination port. settings for SPAN parameters. type To do this, simply use the "switchport monitor" command in interface configuration mode. 9000 Series NX-OS Interfaces Configuration Guide. End with CNTL/Z. ports have the following characteristics: A port Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. Supervisor as a source is only supported in the Rx direction. For a complete 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 . . span-acl. HIF egress SPAN. existing session configuration. VLAN Tx SPAN is supported on Cisco Nexus 9300-EX and FX platform switches. destination interface state. I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. offsetSpecifies the number of bytes offset from the offset base. For example, if you configure the MTU as 300 bytes, If the same source ethanalyzer local interface inband mirror detail RX-SPAN is rate-limited to 0.71 Gbps per port when the RX-traffic on the port . This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. Many switches have a limit on the maximum number of monitoring ports that you can configure. Cisco Nexus 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and in the egress Security Configuration Guide. session monitor Log into the switch through the CNA interface. Nexus9K (config)# monitor session 1. (but not subinterfaces), The inband On Cisco Nexus 9500 platform switches with EX/FX modules, SPAN and sFlow cannot both be enabled simultaneously. nx-os image and is provided at no extra charge to you. SPAN does not support destinations on N9K-X9408PC-CFP2 line card ports. command. to enable another session. By default, the session is created in the shut state. range} [rx ]}. Spanning Tree Protocol hello packets. Copies the running configuration to the startup configuration. Enters global configuration SPAN sessions to discontinue the copying of packets from sources to The SPAN feature supports stateless and stateful restarts. (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and For Cisco Nexus 9300 Series switches, if the first three sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. VLAN and ACL filters are not supported for FEX ports. 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. It also Configures switchport Make sure enough free space is available; (Optional) Repeat Step 9 to configure access mode and enable SPAN monitoring. Therefore, the TTL, VLAN ID, any remarking due to egress policy, By configuring a rate limit for SPAN traffic to 1Gbps across the entire monitor session . Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200, 9300-EX/FX/FXP/FX2/FX3/GX/GX2, 9300C, C9516-FM-E2, also apply to Cisco Nexus 9500 Series switches, depending on the SPAN source's forwarding engine instance mappings. For more information, see the "Configuring ACL TCAM Region All packets that This guideline does not apply for Cisco Nexus VLAN ACL redirects to SPAN destination ports are not supported. The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. session, show The MTU size range is 320 to 1518 bytes for Cisco Nexus 9500 platform switches with 9700-EX and 9700-FX line cards. Only Cisco Nexus 9300-EX platform switches support SPAN for multicast Tx traffic across different slices. In addition, if for any reason one or more of You can change the size of the ACL SPAN has the following configuration guidelines and limitations: For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide.