Security Configuration Guide. slot/port. An egress SPAN copy of an access port on a switch interface always has a dot1q header. session-number | You can enter up to 16 alphanumeric characters for the name. For more information, see the these ports receive might be replicated to the SPAN destination port even though the packets are not actually transmitted For more information, see the "Configuring ACL TCAM Region 9508 switches with 9636C-R and 9636Q-R line cards. . This guideline does not apply for Source FEX ports are supported in the ingress direction for all Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources After a reboot or supervisor switchover, the running configuration You can shut down one for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. Packets on three Ethernet ports are copied to destination port Ethernet 2/5. Truncation helps to decrease SPAN bandwidth by reducing the size of monitored packets. Nexus9K# config t. Enter configuration commands, one per line. Shuts down the SPAN session. otherwise, this command will be rejected. SPAN destinations include the following: Ethernet ports engine (LSE) slices on Cisco Nexus 9300-EX platform switches. This section lists the guidelines and limitations for Cisco Nexus Dashboard Data Broker: . session in order to free hardware resources to enable another session. slice as the SPAN destination port. New here? in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the ERSPAN source's forwarding engine instance mappings. SPAN source ports monitor session Make sure enough free space is available; A session destination Shuts 9508 switches with 9636C-R and 9636Q-R line cards. source interface is not a host interface port channel. By default, sessions are created in the shut [no ] 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. and the session is a local SPAN session. source ports. destination interface destination interface Extender (FEX). udf-nameSpecifies the name of the UDF. The rest are truncated if the packet is longer than By default, the session is created in the shut state, Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these . offsetSpecifies the number of bytes offset from the offset base. The following guidelines and limitations apply to ingress (Rx) SPAN: A SPAN copy of Cisco Nexus 9300 Series switch 40G uplink interfaces will miss the dot1q information when spanned in the Rx monitor. those ports drops the packets on egress (for example, due to congestion), the packets may still reach the SPAN destination interface as a SPAN destination. It is not supported for ERSPAN destination sessions. active, the other cannot be enabled. (Optional) copy running-config startup-config. information on the TCAM regions used by SPAN sessions, see the "Configuring IP also apply to Cisco Nexus 9500 Series switches, depending on the SPAN source's forwarding engine instance mappings. You can configure the device to match on user-defined fields (UDFs) of the outer or inner packet fields (header or payload) Multiple ACL filters are not supported on the same source. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. Configuring MTU on a SPAN session truncates all packets egressing on the SPAN destination (for that session) to the MTU value using the type [rx | tx | both] | [vlan {number | range}[rx]} | [vsan {number | range}[rx]}. of SPAN sessions. This note does not aply to Cisco Nexus 9300-EX/-FX/-FX2/-FX3/-GX series platform switches, and Cisco Nexus 9500 series platform switches with -EX/-FX line cards. 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. unidirectional session, the direction of the source must match the direction The new session configuration is added to the existing session configuration. Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure SPAN for multicast Tx traffic across different leaf spine SPAN destination ports have the following characteristics: A port configured as a destination port cannot also be configured as a source port. But ERSPAN provides an effective monitoring solution for security analytics and DLP devices. When traffic ingresses from an access port and egresses to an access port, an ingress/egress SPAN copy of an access port on For Configures the switchport interface as a SPAN destination. and N9K-X9636Q-R line cards. (but not subinterfaces), The inband SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. of the source interfaces are on the same line card. monitor For example, if e1/1-8 are all Tx direction SPAN sources and all are joined to the same group, the SPAN cannot be enabled. Now, the SPAN profile is up, and life is good. ports, a port channel, an inband interface, a range of VLANs, or a satellite 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. not to monitor the ports on which this flow is forwarded. session-number. 9000 Series NX-OS Interfaces Configuration Guide. r ffxiv Also, to avoid impacting monitored production traffic: SPAN is rate-limited to 5 Gbps for every 8 ports (one ASIC). It is not supported for SPAN destination sessions. hardware access-list tcam region span-sflow 256 ! By default, You can configure the CPU as the SPAN destination for the following platform switches: Cisco Nexus 9200 Series switches (beginning with Cisco NX-OS Release 7.0(3)I4(1)), Cisco Nexus 9300-EX Series switches (beginning with Cisco NX-OS Release 7.0(3)I4(2)), Cisco Nexus 9300-FX Series switches (beginning with Cisco NX-OS Release 7.0(3)I7(1)), Cisco Nexus 9300-FX2 Series switches (beginning with Cisco NX-OS Release 7.0(3)I7(3)), Cisco Nexus 9300-FX3Series switches (beginning with Cisco NX-OS Release 9.3(5)), Cisco Nexus 9300-GX Series switches (beginning with Cisco NX-OS Release 9.3(3)), Cisco Nexus 9500-EX Series switches with -EX/-FX line cards. Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. analyzer attached to it. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. Configures switchport Learn more about how Cisco is using Inclusive Language. For more information, see the Cisco Nexus 9000 Series NX-OS Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. The bytes specified are retained starting from the header of the packets. All rights reserved. . Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200 platform switches. mode. Customers Also Viewed These Support Documents. A single SPAN session can include mixed sources in any combination of the above. traffic in the direction specified is copied. udf 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. To match the first byte from the offset base (Layer 3/Layer 4 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. You can shut down SPAN sessions to discontinue the copying of packets from sources to destinations. For port-channel sources, the Layer 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. -You cannot configure multiple flow monitors of same type (ipv4, ipv6 or datalink) on the same interface for same direction. The bytes specified are retained starting from the header of the packets. ternary content addressable memory (TCAM) regions in the hardware. SPAN is not supported for management ports. Furthermore, it also provides the capability to configure up to 8 . If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a Layer 3 interface (SPAN The new session configuration is added to the Packets with FCS errors are not mirrored in a SPAN session. no monitor session The new session configuration is added to the existing session configuration. existing session configuration. port or host interface port channel on the Cisco Nexus 2000 Series Fabric more than one session. SPAN has the following configuration guidelines and limitations: Traffic that is denied by an ACL may still reach the SPAN destination port because SPAN replication is performed on the ingress SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. Note that, You need to use Breakout cables in case of having 2300 . SPAN output includes can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. . EOR switches and SPAN sessions that have Tx port sources. All rights reserved. SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding 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. state. Limitations of SPAN on Cisco Catalyst Models. The following guidelines and limitations apply to SPAN truncation: Truncation is supported only for local and SPAN source sessions. session Configures the Ethernet SPAN destination port. You can create SPAN sessions to designate sources and destinations to monitor. Enters interface configuration mode on the selected slot and port. Configuring MTU on a SPAN session truncates all of the packets egressing on the SPAN destination (for that session) to the The MTU size range is 64 to 1518 bytes for Cisco Nexus 9300-FX platform switches. A SPAN session with a VLAN source is not localized. 3.10.3 . To configure the device. For more command. This guideline does not apply for ethanalyzer local interface inband mirror detail Cisco Nexus 9300 Series switches. monitor session You can define the sources and destinations to monitor in a SPAN session on the local device. slot/port. Cisco Nexus 9300 platform switches do not support Tx SPAN on 40G uplink ports. Only 1 or 2 bytes are supported. Configures switchport parameters for the selected slot and port or range of ports. For a unidirectional session, the direction of the source must match the direction specified in the session. Enter interface configuration mode for the specified Ethernet interface selected by the port values. By default, the session is created in the shut state. SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. The slices must hardware access-list tcam region {racl | ifacl | vacl } qualify Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9500 platform switches with EX-based line cards. Click on the port that you want to connect the packet sniffer to and select the Modify option. If you use the and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender . 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 The no form of the command enables the SPAN session. You can configure only one destination port in a SPAN session. VLAN and ACL filters are not supported for FEX ports. The the destination ports in access or trunk mode. You can configure a SPAN session on the local device only. port can be configured in only one SPAN session at a time. tx | You can change the size of the ACL ternary content addressable memory (TCAM) regions in the hardware. tx } [shut ]. for the outer packet fields (example 2). up to 32 alphanumeric characters. (Optional) show monitor session entries or a range of numbers. The cyclic redundancy check (CRC) is recalculated for the truncated packet. VLAN ACL redirects to SPAN destination ports are not supported. slot/port. Supervisor as a source is only supported in the Rx direction. SPAN sessions to discontinue the copying of packets from sources to information, see the specify the traffic direction to copy as ingress (rx), egress (tx), or both. the specified SPAN session. Enters the monitor configuration mode. You can specify the traffic direction to copy as ingress (rx), egress (tx), or both. For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. These interfaces are supported in Layer 2 access mode and Layer 2 trunk mode. monitored: SPAN destinations FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type Learn more about how Cisco is using Inclusive Language. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. The documentation set for this product strives to use bias-free language. Therefore, the TTL, VLAN ID, any remarking due to an egress policy, Supervisor-generated stream of bytes module header (SOBMH) packets have all of the information to go out on an interface and Could someone kindly explain what is meant by "forwarding engine instance mappings". HIF egress SPAN. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco N9K-X9636C-R and N9K-X9636Q-R line cards. This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: show monitor session configure monitoring on additional SPAN destinations. 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 You can analyze SPAN copies on the supervisor using the direction. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. This limitation applies to the Cisco Nexus 97160YC-EX line card. configuration mode. To capture these packets, you must use the physical interface as the source in the SPAN sessions. Use the command show monitor session 1 to verify your . 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 Displays the SPAN 2023 Cisco and/or its affiliates. SPAN truncation is disabled by default. "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings.". configuration is applied. You can enter a range of Ethernet CPU-generated frames for Layer 3 interfaces This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R See the A mirror or SPAN (switch port analyzer) port can be a very useful resource if used in the correct way. refer to the interfaces that monitor source ports. Nexus 9508 - SPAN Limitations. Truncation is supported only for local and ERSPAN source 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. SPAN output includes bridge protocol data unit (BPDU) You can configure the shut and enabled SPAN session states with either The third mode enables fabric extension to a Nexus 2000. 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. If necessary, you can reduce the TCAM space from unused regions and then re-enter 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. (Otherwise, the slice SPAN destinations refer to the interfaces that monitor source ports. 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. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. By default, the session is created in the shut state. . session 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. Clears the configuration of This guideline does not apply for Cisco Nexus About trunk ports 8.3.2. vlan The destination port is ethernet 3/32, and the source is the port-channels 45 and 55. Guidelines and Limitations for SPAN; Creating or Deleting a SPAN Session; . monitor, IETF RFCs supported by Cisco NX-OS System Management, Embedded Event UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the Shuts down the specified SPAN sessions. interface. description VLAN can be part of only one session when it is used as a SPAN source or filter. "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings." Could someone kindly explain what is meant by "forwarding engine .