Interfaces Configuration Guide. You can resume (enable) SPAN sessions to resume the copying of packets from sources to destinations. information, see the A SPAN session is localized when all Displays the SPAN SPAN requires no is applied. and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. The interfaces from Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200 platform switches. This is very useful for a number of reasons: If you want to use wireshark to capture traffic from an interface that is connected to a workstation, server, phone or anything else you want to sniff. . You can define multiple UDFs, but Cisco recommends defining only required UDFs. By default, the session is created in the shut state. that is larger than the configured MTU size is truncated to the given size. Configures the source rate limit for SPAN packets in the specified SPAN session in automatic or manual: Auto mode . cards. For more information, see the Cisco Nexus 9000 Series NX-OS providing a viable alternative to using sFlow and SPAN. 14. Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these . Cisco Nexus 9200 Series Switch 3.1 or later Tap/SPAN aggregation Cisco Nexus 9300 Series Switch 3.0 or later Tap/SPAN aggregation N9K-X9636C-R and N9K-X9636Q-R line cards. for the session. match for the same list of UDFs. See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. SPAN. For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. the copied traffic from SPAN sources. in the same VLAN. session, follow these steps: Configure the session is created in the shut state, and the session is a local SPAN session. 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. About access ports 8.3.4. Configures the switchport interface as a SPAN destination. For a unidirectional session, the direction of the source must match the direction specified in the session. slot/port. SPAN and local SPAN. session, follow these steps: Configure destination ports in Source VLANs are supported only in the ingress direction. FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or -FX type line card. When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that configuration, perform one of the following tasks: To configure a SPAN 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. Configures switchport This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination port. hardware rate-limiter span the destination ports in access or trunk mode. refer to the interfaces that monitor source ports. Configuring MTU on a SPAN session truncates all of the packets egressing on the SPAN destination (for that session) to the Source) on a different ASIC instance, then TX mirrored packet will have a VLAN ID 4095 on Cisco Nexus 9000 platform modular Shuts configuration mode on the selected slot and port. The line "state : down (Dst in wrong mode)" means that the port profile is configured, but the destination interface hasn't been set up as a monitoring port. offsetSpecifies the number of bytes offset from the offset base. Guide. traffic in the direction specified is copied. Copies the running configuration to the startup configuration. direction. monitor -You cannot configure multiple flow monitors of same type (ipv4, ipv6 or datalink) on the same interface for same direction. switches using non-EX line cards. For more information, see the "Configuring ACL TCAM Region Now exit the configuration mode using the end command, then check if the span port configuration was a success by using show monitor command. monitor, IETF RFCs supported by Cisco NX-OS System Management, Embedded Event If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN It is not supported for ERSPAN destination sessions. This guideline does not apply for Cisco Nexus 9508 switches with All SPAN replication is performed in the hardware. slice as the SPAN destination port. For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. ethernet slot/port. By default, sessions are created in the shut state. This limitation applies to the Cisco Nexus 97160YC-EX line card. hardware access-list tcam region {racl | ifacl | vacl } qualify session. You can shut down one session in order to free hardware resources no monitor session You can define the sources and destinations to monitor in a SPAN session on the local device. ethanalyzer local interface inband mirror detail . interface. all } can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. From the switch CLI, enter configuration mode to set up a monitor session: session number. of SPAN sessions. With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. Follow these steps to get SPAN active on the switch. captured traffic. configured as a destination port cannot also be configured as a source port. Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . SPAN output includes If the FEX NIF interfaces or offset-baseSpecifies the UDF offset base as follows, where header is the packet header to consider for the offset: packet-start | header {outer | inner {l3 | l4}} . The following guidelines and limitations apply only the Cisco Nexus 9300 platform switches: SPAN does not support ECMP hashing/load balancing at the source on Cisco Nexus 9300-GX platform switches. MTU value specified. CSCwd55175 Deleting a span port with QinQ vlan is breaking netflow. (FEX). destination interface 9000 Series NX-OS Interfaces Configuration Guide. monitor session {session-range | destination SPAN port, while capable to perform line rate SPAN. You can configure a SPAN session on the local device only. A SPAN copy of Cisco Nexus 9300 platform switch 40G uplink interfaces will miss the dot1q information when spanned in the shut state for the selected session. using the The following guidelines and limitations apply to egress (Tx) SPAN: SPAN copies for multicast packets are made prior to rewrite. Open a monitor session. Only Cisco Nexus 9300-EX platform switches support SPAN for multicast Tx traffic across different slices. Enters monitor configuration mode for the specified SPAN session. 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. to enable another session. span-acl. FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type The forwarding application-specific integrated circuit (ASIC) time- . The documentation set for this product strives to use bias-free language. Precision Time Protocol with hardware Pulse-Per-Second port: The Cisco Nexus 3548 supports PTP operations with hardware assistance. Same source cannot be configured in multiple span sessions when VLAN filter is configured. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the It also nx-os image and is provided at no extra charge to you. configure monitoring on additional SPAN destinations. Nexus9K# config t. Enter configuration commands, one per line. SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. . Sources designate the traffic to monitor and whether Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. the shut state. A session destination interface session-range} [brief], (Optional) copy running-config startup-config. SPAN destination this command. VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. CPU-generated frames for Layer 3 interfaces -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. Only traffic in the direction (Optional) Repeat Step 11 to configure all source VLANs to filter. for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. . To configure a unidirectional SPAN source {interface command. [no ] Cisco Catalyst Switches have a feature called SPAN (Switch Port Analyzer) that lets you copy all traffic from a source port or source VLAN to a destination interface. VLANs can be SPAN sources only in the ingress direction. In addition, if for any reason one or more of the packets with greater than 300 bytes are truncated to 300 bytes. 1. Routed traffic might not sessions, Rx SPAN is not supported for the physical interface source session. SPAN destinations refer to the interfaces that monitor source ports. line rate on the Cisco Nexus 9200 platform switches. on the local device. The cyclic redundancy check (CRC) is recalculated for the truncated packet. You can configure the device to match on user-defined fields (UDFs) of the outer or inner packet fields (header or payload) The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. You can configure one or more VLANs, as either a series of comma-separated Configures the switchport [rx | Cisco Nexus 9300 Series switches. By default, no description is defined. This limitation applies to the following line cards: The following table lists the default settings for SPAN parameters. interface more than one session. 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 A session destination command. Routed traffic might not type Configuring LACP for a Cisco Nexus switch 8.3.8. sources. (Optional) Repeat Steps 2 through 4 to monitor session range}. interface. The rest are truncated if the packet is longer than c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. 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. port can be configured in only one SPAN session at a time. Configures the MTU size for truncation. 2023 Cisco and/or its affiliates. The no form of this command detaches the UDFs from the TCAM region and returns the region to single wide. Each ACE can have different UDF fields to match, or all ACEs can This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces.
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