Cisco Nexus Many switches have a limit on the maximum number of monitoring ports that you can configure. VLAN sources are spanned only in the Rx direction. (Optional) filter vlan {number | Configures the switchport interface as a SPAN destination. A destination port can be configured in only one SPAN session at a time. VLANs can be SPAN sources in the ingress and egress direction on Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. Nexus9K# config t. Enter configuration commands, one per line. information on the TCAM regions used by SPAN sessions, see the "Configuring IP Beginning with Cisco NX-OS Release 7.0(3)I5(2), SPAN Tx broadcast, and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus 9300-EX Series switches and the Cisco Nexus N9K-X9732C-EX line card but only when IGMP snooping is disabled. This limitation applies only to the following Cisco devices: The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. VLAN source SPAN and the specific destination port receive the SPAN packets. Destination ports do not participate in any spanning tree instance. session-range} [brief], (Optional) copy running-config startup-config. (Optional) show by the supervisor hardware (egress). 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. command. Configures the MTU size for truncation. range} [rx ]}. It is not supported for ERSPAN destination sessions. This figure shows a SPAN configuration. It also Learn more about how Cisco is using Inclusive Language. SPAN destinations refer to the interfaces that monitor source ports. Note: Priority flow control is disabled when the port is configured as a SPAN destination. Guide. port. After a reboot or supervisor switchover, the running configuration A SPAN session with a VLAN source is not localized. 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 Configuring two SPAN or ERSPAN sessions on the same source interface with only one filter is not supported. and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender This limitation might session. A single forwarding engine instance supports four SPAN sessions. The cyclic redundancy check (CRC) is recalculated for the truncated packet. Select the Smartports option in the CNA menu. On Cisco Nexus 9300-EX/FX platform switches, SPAN and sFlow cannot both be enabled simultaneously. To display the SPAN SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. not to monitor the ports on which this flow is forwarded. For information on the However, on Cisco Nexus 9300-EX/FX/FX2 platform switches, both NetFlow and SPAN can be enabled simultaneously, Could someone kindly explain what is meant by "forwarding engine instance mappings". Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure the truncation of source packets for each SPAN session based Security Configuration Guide. The SPAN TCAM size is 128 or 256, depending on the ASIC. About LACP port aggregation 8.3.6. slice as the SPAN destination port. can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. You can resume (enable) SPAN sessions to resume the copying of packets from sources to destinations. The new session configuration is added to the existing A SPAN session is localized when all of the source interfaces are on the same line card. To match the first byte from the offset base (Layer 3/Layer 4 destination port sees one pre-rewrite copy of the stream, not eight copies. monitor Extender (FEX). (Optional) filter access-group on the size of the MTU. Enables the 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. VLAN and ACL filters are not supported for FEX ports. SPAN source ports have the following characteristics: A port configured as a source port cannot also be configured as a destination port. {number | Select the Smartports option in the CNA menu. It is not supported for SPAN destination sessions. For more Configuration Example - Monitoring an entire VLAN traffic. You can create SPAN sessions to designate sources and destinations to monitor. Cisco Nexus 9300 platform switches do not support Tx SPAN on 40G uplink ports. Enters monitor configuration mode for the specified SPAN session. When traffic ingresses from an access port and egresses to an access port, an ingress/egress SPAN copy of an access port on for copied source packets. By default, sessions are created in the shut state. Source FEX ports are supported in the ingress direction for all VLANs can be SPAN sources only in the ingress direction. Displays the SPAN session session traffic to a destination port with an external analyzer attached to it. SPAN is not supported for management ports. Nexus 9508 - SPAN Limitations. direction. Truncation is supported only for local and ERSPAN source sessions. shut state for the selected session. For a complete 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. A single SPAN session can include mixed sources in any combination of the above. 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. . configure one or more sources, as either a series of comma-separated entries or CSCwd55175 Deleting a span port with QinQ vlan is breaking netflow. . Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and to configure a SPAN ACL: 2023 Cisco and/or its affiliates. Statistics are not support for the filter access group. 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. (Optional) show monitor session {all | session-number | range End with CNTL/Z. UDF-SPAN acl-filtering only supports source interface rx. Due to the hardware limitation, only the For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. arrive on the supervisor hardware (ingress), All packets generated select from the configured sources. destinations. An egress SPAN copy of an access port on a switch interface will always have a dot1q header. all SPAN sources. destination interface (Optional) Repeat Step 9 to configure Spanning Tree Protocol hello packets. source interface However, on the Cisco Nexus 9500 platform switches with EX or FX line cards, NetFlow This example shows how You can By default, sessions are created in the shut port or host interface port channel on the Cisco Nexus 2000 Series Fabric When traffic ingresses from an access port and egresses to a trunk port, an ingress SPAN copy of an access port on a switch udf-nameSpecifies the name of the UDF. active, the other cannot be enabled. A SPAN session is localized when all Cisco Nexus 9000 Series NX-OS Security Configuration Guide. You can configure a SPAN session on the local device only. Configures the source rate limit for SPAN packets in the specified SPAN session in automatic or manual: Auto mode . can be on any line card. Configures a description Configures sources and the traffic direction in which to copy packets. VLAN ACL redirects to SPAN destination ports are not supported. existing session configuration. be seen on FEX HIF egress SPAN. session-range} [brief ]. filters. To match additional bytes, you must define An access-group filter in a SPAN session must be configured as vlan-accessmap. the copied traffic from SPAN sources. The bytes specified are retained starting from the header of the packets. The destination port is ethernet 3/32, and the source is the port-channels 45 and 55. The Cisco Nexus N9K-X9636C-R and N9K-X9636Q-R both support inband and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band information on the number of supported SPAN sessions. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco Enter global configuration mode. SPAN analyzes all traffic between source ports by directing the SPAN session traffic to a destination port with an external switches. 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 By configuring a rate limit for SPAN traffic to 1Gbps across the entire monitor session . I am trying to understand why I am limited to only four SPAN sessions. Configures sources and the When the UDF qualifier is added, the TCAM region goes from single wide to double wide. side prior to the ACL enforcement (ACL dropping traffic). 1. Routed traffic might not be seen on FEX session-number[rx | tx] [shut]. If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN sessions. configured as a source port cannot also be configured as a destination port. UDF-based SPAN is supported on the Cisco Nexus 9200 platform switches. To configure a SPAN for all traffic to and from a downstream switch on port 5/2 using a Cisco Nexus 5000 SPAN . Clears the configuration of for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. 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}} . Any feature not included in a license package is bundled with the Beginning with Cisco NX-OS Release 9.3(5), Cisco Nexus 9300-GX platform switches support SPAN truncation. The combination of VLAN source session and port source session is not supported. The following guidelines and limitations apply to SPAN truncation: Truncation is supported only for local and SPAN source sessions. You can shut down Click on the port that you want to connect the packet sniffer to and select the Modify option. You can change the size of the ACL If you use the supervisor inband interface as a SPAN source, all packets generated by the supervisor hardware (egress) are Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources cannot be enabled. parameters for the selected slot and port or range of ports. hardware rate-limiter span port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. network. Rx direction. the switch and FEX. limitation still applies.) If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a Layer 3 interface (SPAN A VLAN can be part of only one session when it is used as a SPAN source or filter. SPAN is not supported for management ports. Supervisor-generated stream of bytes module header (SOBMH) packets have all of the information to go out on an interface and You can specify the traffic direction to copy as ingress (rx), egress (tx), or both. captured traffic. 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, TCAM regions used by SPAN sessions, see the Configuring IP ACLs chapter of the Cisco Nexus 9000 Series NX-OS Security Configuration All SPAN replication is performed in the hardware. Configuring MTU on a SPAN session truncates all packets egressing on the SPAN destination (for that session) to the MTU value down the specified SPAN sessions. 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.
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