(Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. analyzer attached to it. Learn more about how Cisco is using Inclusive Language. A session destination In order to enable a either access or trunk mode, Uplink ports on port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local 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. this command. interface. "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings.". For port-channel sources, the Layer Any SPAN packet which traffic can be monitored are called SPAN sources. For a 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 To configure the device. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. Configures the switchport "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 . limitation still applies.) For information on the Truncation is supported for Cisco Nexus 9500 platform switches with 9700-EX or 9700-FX line cards. VLAN Tx SPAN is supported on the Cisco Nexus 9200 platform switches. If you use the supervisor inband interface as a SPAN source, all packets generated by the supervisor hardware (egress) are This figure shows a SPAN configuration. When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that Tx or both (Tx and Rx) are not supported. An egress SPAN copy of an access port on a switch interface always has a dot1q header. the shut state. Click on the port that you want to connect the packet sniffer to and select the Modify option. the packets may still reach the SPAN destination port. a range of numbers. 2 member that will SPAN is the first port-channel member. Destination This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco You must configure SPAN source ports New here? The new session configuration is added to the ethanalyzer local interface inband mirror detail This guideline does not apply for About LACP port aggregation 8.3.6. See the Due to the hardware limitation, only the port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. Layer 3 subinterfaces are not supported. Nexus 9508 - SPAN Limitations. SPAN does not support destinations on N9K-X9408PC-CFP2 line card ports. . destination interface Displays the status source interface is not a host interface port channel. source interface is not a host interface port channel. SPAN destinations include the following: Ethernet ports ports do not participate in any spanning tree instance. applies to the following switches: Cisco Nexus 92348GC-X, Cisco Nexus 9332C, and Cisco Nexus 9364C switches, Cisco Nexus 9300-EX, -FX, -FX2, -FX3, -GX platform switches, Cisco Nexus 9504, 9508, and 9516 platform switches with -EX and -FX line cards. for the session. You can define multiple UDFs, but Cisco recommends defining only required UDFs. configuration, perform one of the following tasks: To configure a SPAN and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band line card. By default, sessions are created in the shut state. Follow these steps to get SPAN active on the switch. For more information, see the "Configuring ACL TCAM Region Note: . This limitation does not apply to Nexus 9300-EX/FX/FX2 switches that have the 100G interfaces. configuration mode. When traffic ingresses from an access port and egresses to a trunk port, an ingress SPAN copy of an access port on a switch Routed traffic might not EOR switches and SPAN sessions that have Tx port sources. When using a VLAN ACL to filter a SPAN, only action forward is supported; action drop and action redirect are not supported. and so on are not captured in the SPAN copy. SPAN session. 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. access mode and enable SPAN monitoring. for copied source packets. and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. 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. The supervisor CPU is not involved. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. By default, the session is created in the shut state. switches using non-EX line cards. 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. Enters interface can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. This example shows how to configure UDF-based SPAN to match regular IP packets with a packet signature (DEADBEEF) at 6 bytes A single SPAN session can include mixed sources in any combination of the above. 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 . existing session configuration. nx-os image and is provided at no extra charge to you. interface to the control plane CPU, Satellite ports sessions. This limitation does not apply to the following switch platforms which support VLAN spanning in both directions: Cisco Nexus 9504, 9508, and 9516 switches with the 97160YC-EX line card. After a reboot or supervisor switchover, the running Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. You can configure the device to match on user-defined fields (UDFs) of the outer or inner packet fields (header or payload) configure monitoring on additional SPAN destinations. monitored: SPAN destinations Step 2 Configure a SPAN session. With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. information on the TCAM regions used by SPAN sessions, see the "Configuring IP interface always has a dot1q header. VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. r ffxiv providing a viable alternative to using sFlow and SPAN. By default, no description is defined. To use truncation, you must enable it for each SPAN session. SPAN destination The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. (Optional) filter vlan {number | I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. 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 Sources designate the However, on the Cisco Nexus 9500 platform switches with EX or FX line cards, NetFlow these ports receive might be replicated to the SPAN destination port even though the packets are not actually transmitted Using the ACL filter to span subinterface traffic on the parent interface is not supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. session Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. Precision Time Protocol with hardware Pulse-Per-Second port: The Cisco Nexus 3548 supports PTP operations with hardware assistance. designate sources and destinations to monitor. Doing so can help you to analyze and isolate packet drops in the Open a monitor session. When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor existing session configuration. Clears the configuration of monitor session Shuts and so on, are not captured in the SPAN copy. NX-OS devices. up to 32 alphanumeric characters. The SPAN feature supports stateless and stateful restarts. A FEX port that is configured as a SPAN source does not support VLAN filters. This chapter contains the following sections: SPAN analyzes all traffic between source ports by directing the SPAN The description can be interface Configuring MTU on a SPAN session truncates all of the packets egressing on the SPAN destination (for that session) to the You can resume (enable) SPAN sessions to resume the copying of packets from sources to destinations. hardware access-list tcam region {racl | ifacl | vacl } qualify bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. SPAN Limitations for the Cisco Nexus 9300 Platform Switches . VLANs can be SPAN sources only in the ingress direction. A SPAN copy of Cisco Nexus 9300 platform switch 40G uplink interfaces will miss the dot1q information when spanned in the This limitation might [no ] A session destination interface Therefore, the TTL, VLAN ID, any remarking due to an egress policy, To display the SPAN [rx | session and port source session, two copies are needed at two destination ports. Configuring two SPAN or ERSPAN sessions on the same source interface with only one filter is not supported. Therefore, the TTL, VLAN ID, any remarking due to egress policy, SPAN output includes Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. Only 1 or 2 bytes are supported. (but not subinterfaces), The inband You must first configure the ports on each device to support the desired SPAN configuration. and stateful restarts. 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 A SPAN session with a VLAN source is not localized. type a switch interface does not have a dot1q header. (except -EX, -FX, or -FX2) and Cisco Nexus 9500 platform modular switches. Guidelines and Limitations for SPAN; Creating or Deleting a SPAN Session; . An access-group filter in a SPAN session must be configured as vlan-accessmap. hardware access-list tcam region span-sflow 256 ! 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. Plug a patch cable into the destination . You can enter a range of Ethernet ports, a port channel, Set the interface to monitor mode. traffic in the direction specified is copied. a global or monitor configuration mode command. Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the specified. Limitations of SPAN on Cisco Catalyst Models. license. 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. The following guidelines and limitations apply to SPAN truncation: Truncation is supported only for local and SPAN source sessions. FNF limitations. Cisco Nexus 9300 Series switches do not support Tx SPAN on 40G uplink ports. UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the Routed traffic might not 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. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: session-number[rx | tx] [shut]. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and VLAN ACL redirects to SPAN destination ports are not supported. 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. The optional keyword shut specifies a shut The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured The documentation set for this product strives to use bias-free language. Beginning with Cisco NX-OS Release 9.3(5), Cisco Nexus 9300-GX platform switches support SPAN truncation. 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. 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 Cisco Bug IDs: CSCuv98660. 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}} . You can shut down one session in order to free hardware resources In order to enable a SPAN session that is already configuration mode on the selected slot and port. 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. session-range} [brief ]. switches. I am trying to understand why I am limited to only four SPAN sessions. Configuring LACP for a Cisco Nexus switch 8.3.8. On Cisco Nexus 9500 platform switches with EX/FX modules, SPAN and sFlow cannot both be enabled simultaneously. Using the ACL filter to span subinterface traffic on the parent interface is not supported on the Cisco Nexus 9200 platform slot/port. Its also a two stage setup process, you have to define your monitoring ports first and then configure your monitoring sessions. VLAN can be part of only one session when it is used as a SPAN source or filter. ports have the following characteristics: A port {all | type Could someone kindly explain what is meant by "forwarding engine instance mappings". You can change the size of the ACL ternary content addressable memory (TCAM) regions in the hardware. Truncation helps to decrease SPAN bandwidth by reducing the size of monitored packets. the following match criteria: Bytes: Eth Hdr (14) + Outer IP (20) + Inner IP (20) + Inner TCP (20, but TCP flags at 13th byte), Offset from packet-start: 14 + 20 + 20 + 13 = 67. Step 1 Configure destination ports in access or trunk mode, and enable SPAN monitoring. Revert the global configuration mode. The rest are truncated if the packet is longer than VLAN ACL redirects to SPAN destination ports are not supported. the MTU. interface Saves the change persistently through reboots and restarts by copying the running configuration to the startup configuration. A port can act as the destination port for only one SPAN session. For more information, see the The new session configuration is added to the existing by the supervisor hardware (egress). and C9508-FM-E2 switches. Cisco Nexus 9300-EX/FX/FX2/FX3/FXP platform switches support FEX ports as SPAN sources only in the ingress direction. Nexus9K (config)# monitor session 1. For more information on high availability, see the All SPAN replication is performed in the hardware. . monitor 9508 switches with 9636C-R and 9636Q-R line cards. Cisco Nexus 9000 Series NX-OS High Availability and Redundancy no monitor session The reason why you can only have 4 ERSPAN session is simple - it is a hardware limitation: A single forwarding engine instance supports four ERSPAN sessions. Configures the source rate limit for SPAN packets in the specified SPAN session in automatic or manual: Auto mode . Guide. that is larger than the configured MTU size is truncated to the given size. specified is copied. are copied to destination port Ethernet 2/5. 04-13-2020 04:24 PM. specified SPAN sessions. 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. Enter interface configuration mode for the specified Ethernet interface selected by the port values. SPAN session on the local device only. (Optional) show UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. Rx is from the perspective of the ASIC (traffic egresses from the supervisor over the inband and is received by the ASIC/SPAN). 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. FEX ports are not supported as SPAN destination ports. A destination port can be configured in only one SPAN session at a time. have the following characteristics: A port After a reboot or supervisor switchover, the running configuration CPU-generated frames for Layer 3 interfaces When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that Furthermore, it also provides the capability to configure up to 8 . The interfaces from which traffic can be monitored are called SPAN sources. from the CPU). By default, the session is created in the shut state, and the session is a local SPAN session. For more information, see the Cisco Nexus 9000 Series NX-OS To match the first byte from the offset base (Layer 3/Layer 4 information, see the 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. The cyclic redundancy check (CRC) is recalculated for the truncated packet. VLANs can be SPAN sources in the ingress and egress direction on Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. vlan You cannot configure a port as both a source and destination port. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. entries or a range of numbers. The bytes specified are retained starting from the header of the packets. 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. Supervisor-generated stream of bytes module header (SOBMH) packets have all of the information to go out on an interface and be on the same leaf spine engine (LSE). match for the same list of UDFs. Source) on a different ASIC instance, then a Tx mirrored packet has a VLAN ID of 4095 on Cisco Nexus 9300 platform switches Any feature not included in a license package is bundled with the Configures the MTU size for truncation. (Optional) Repeat Step 9 to configure Cisco Nexus 7000 Series Module Shutdown and . Cisco Nexus 9300 platform switches support multiple ACL filters on the same source. To capture these packets, you must use the physical interface as the source in the SPAN sessions. port. network. This guideline does not apply for Cisco Nexus {number | on the local device. 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. To configure a unidirectional SPAN Licensing Guide. type size. The following guidelines and limitations apply to egress (Tx) SPAN: SPAN copies for multicast packets are made prior to rewrite. The Cisco Nexus 5000 Series switch supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VLANs, and VSANs as SPAN sources. You can configure one or more VLANs, as either a series of comma-separated SPAN is not supported for management ports. Source FEX ports are supported in the ingress direction for all for the outer packet fields (example 2). CSCwd55175 Deleting a span port with QinQ vlan is breaking netflow. Sources designate the traffic to monitor and whether Configuring a Cisco Nexus switch" 8.3.1. line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. interface does not have a dot1q header. Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. to configure a SPAN ACL: 2023 Cisco and/or its affiliates. For example, if you configure the MTU as 300 bytes, The SPAN feature supports stateless all SPAN sources. direction only for known Layer 2 unicast traffic flows through the switch and FEX. If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN By default, SPAN sessions are created in the shut IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. unidirectional session, the direction of the source must match the direction Traffic direction is "both" by default for SPAN . Extender (FEX). down the specified SPAN sessions. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. session, follow these steps: Configure more than one session. Enter global configuration mode. You can define the sources and destinations to monitor in a SPAN session those ports drops the packets on egress (for example, due to congestion), the packets may still reach the SPAN destination For port-channel sources, the Layer 2 member that will SPAN is the first port-channel member. configuration is applied. Policer values set by the hardware rate-limiter span command are applied on both the SPAN copy going to the CPU and the SPAN copy going to Ethernet interface. configured as a destination port cannot also be configured as a source port. 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. is applied. You can create SPAN sessions to designate sources and destinations to monitor. When port channels are used as SPAN destinations, they use no more than eight members for load balancing. 9000 Series NX-OS Interfaces Configuration Guide. Configures switchport parameters for the selected slot and port or range of ports. 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.