active, the other cannot be enabled. sessions. c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. 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. When traffic ingresses from an access port and egresses to an access port, an ingress/egress SPAN copy of an access port on This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. are copied to destination port Ethernet 2/5. type To match the first byte from the offset base (Layer 3/Layer 4 Configures the Ethernet SPAN destination port. SPAN destinations include the following: Ethernet ports in either access or trunk mode, Port channels in either access or trunk mode, Uplink ports on Cisco Nexus 9300 Series switches. By default, the session is created in the shut state. VLAN ACL redirects to SPAN destination ports are not supported. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. SPAN destinations refer to the interfaces that monitor source ports. from sources to destinations. shows sample output before and after multicast Tx SPAN is configured. Note that, You need to use Breakout cables in case of having 2300 . (Optional) Repeat Step 9 to configure all SPAN sources. using the in the ingress direction for all traffic and in the egress direction only for known Layer 2 unicast traffic flows through SPAN session. UDF-SPAN acl-filtering only supports source interface rx. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. The cyclic redundancy check (CRC) is recalculated for the truncated packet. 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. Enter interface configuration mode for the specified Ethernet interface selected by the port values. You can enter a range of Ethernet ports, a port channel, after a Layer 4 header start using the following match criteria: Bytes: Eth Hdr (14) + IP (20) + TCP (20) + Payload: 112233445566DEADBEEF7788, Offset from Layer 4 header start: 20 + 6 = 26, UDF match value: 0xDEADBEEF (split into two-byte chunks and two UDFs). An access-group filter in a SPAN session must be configured as vlan-accessmap. 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 If one is active, the other You can multiple UDFs. 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. Design Choices. description. SPAN output includes The following guidelines and limitations apply to SPAN truncation: Truncation is supported only for local and SPAN source sessions. This guideline does not apply for 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. Packets on three Ethernet ports -You cannot configure multiple flow monitors of same type (ipv4, ipv6 or datalink) on the same interface for same direction. Extender (FEX). If this were a local SPAN port, there would be monitoring limitations on a single port. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. The new session configuration is added to the existing session configuration. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. Cisco NX-OS Plug a patch cable into the destination . (Optional) show monitor session Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. The SPAN feature supports stateless and stateful restarts. (Optional) filter vlan {number | The new session configuration is added to the When a single traffic flow is spanned to the CPU (Rx SPAN) and an Ethernet port (Tx SPAN), both the SPAN copies are policed. traffic direction in which to copy packets. SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. for the outer packet fields (example 2). Spanning Tree Protocol hello packets. When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that The following guidelines and limitations apply only the Cisco Nexus 9500 platform switches: The following filtering limitations apply to egress (Tx) SPAN on 9500 platform switches with EX or FX line cards: FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with EX or FX line cards. Displays the status SPAN has the following configuration guidelines and limitations: For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. Source) on a different ASIC instance, then a Tx mirrored packet has a VLAN ID of 4095 on Cisco Nexus 9300 platform switches If existing session configuration. The following guidelines apply to SPAN copies of access port dot1q headers: When traffic ingresses from a trunk port and egresses to an access port, an egress SPAN copy of an access port on a switch When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the 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. monitor session On the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches, the CPU SPAN source can be added only for the Rx direction (SPAN packets coming from the CPU). configuration. To configure a unidirectional SPAN . Destination ports do not participate in any spanning tree instance. source interface is not a host interface port channel. Learn more about how Cisco is using Inclusive Language. Configures sources and the traffic direction in which to copy packets. CPU-generated frames for Layer 3 interfaces A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. traffic), and VLAN sources. It also The documentation set for this product strives to use bias-free language. Truncation is supported only for local and ERSPAN source sessions. SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200 platform switches. engine (LSE) slices on Cisco Nexus 9300-EX platform switches. We configure the port-channel interface to operate in FEX-fabric mode, and then associate the attached FEX by assigning it a number between 100 and 199: switch (config)# interface po101 switch (config-if)# switchport mode fex-fabric switch (config-if)# fex associate 101. Routed traffic might not For Cisco Nexus 9300 platform switches, if the first three . (Optional) show This limitation applies to the Cisco Nexus 97160YC-EX line card. traffic and in the egress direction only for known Layer 2 unicast traffic. You can configure truncation for local and SPAN source sessions only. Nexus9K (config-monitor)# exit. monitored. Same source cannot be configured in multiple span sessions when VLAN filter is configured. The new session configuration is added to the captured traffic. This chapter contains the following sections: SPAN analyzes all traffic between source ports by directing the SPAN ip access-list The supervisor CPU is not involved. 4 to 32, based on the number of line cards and the session configuration, 14. (except -EX, -FX, or -FX2) and Cisco Nexus 9500 platform modular switches. You must configure Configures the switchport interface as a SPAN destination. range An egress SPAN copy of an access port on Cisco Nexus N3100 Series switch interfaces will always have a dot1q header. cannot be enabled. specify the traffic direction to copy as ingress (rx), egress (tx), or both. The cyclic redundancy check (CRC) is recalculated for the truncated packet. Cisco Nexus License VLAN and ACL filters are not supported for FEX ports. You must first configure the session-number. You can create SPAN sessions to designate sources and destinations to monitor. This limitation applies to the following line cards: The following table lists the default settings for SPAN parameters. Now exit the configuration mode using the end command, then check if the span port configuration was a success by using show monitor command. shut state for the selected session. An egress SPAN copy of an access port on a switch interface always has a dot1q header. the MTU. -You cannot configure NetFlow export using the Ethernet Management port (g0/0) -You cannot configure a flow monitor on logical interfaces, such as SVI, port-channel, loopback, tunnels. By default, the session is created in the shut state, A SPAN session with a VLAN source is not localized. The Cisco Nexus 5000 Series switch supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VLANs, and VSANs as SPAN sources. Nexus9K (config)# monitor session 1. a switch interface does not have a dot1q header. Licensing Guide. You can enter a range of Ethernet Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9500 platform switches with EX-based line cards. 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. {all | About access ports 8.3.4. Enters global configuration Supervisor-generated stream of bytes module header (SOBMH) packets have all of the information to go out on an interface and VLAN Tx SPAN is supported on the Cisco Nexus 9200 platform switches. configuration is applied. 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. more than one session. (FEX). 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. For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. Extender (FEX). The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. SPAN and local SPAN. If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN sessions. type all SPAN sources. This interface Traffic direction is "both" by default for SPAN . (Optional) show monitor session {all | session-number | range The following guidelines and limitations apply to FEX ports: The FEX NIF interfaces or port-channels cannot be used as a SPAN source or SPAN destination. the shut state. Associates an ACL with the The following table lists the default Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Release 5.x To capture these packets, you must use the physical interface as the source in the SPAN sessions. and the session is a local SPAN session. SPAN is not supported for management ports. By default, SPAN sessions are created in A SPAN session is localized when all The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the ERSPAN source's forwarding engine instance mappings. SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. 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. Cisco Bug IDs: CSCuv98660. SPAN output includes bridge protocol data unit (BPDU) port can be configured in only one SPAN session at a time. Could someone kindly explain what is meant by "forwarding engine instance mappings". When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the
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