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Nexus9K (config-monitor)# exit. sessions. When traffic ingresses from an access port and egresses to a trunk port, an ingress SPAN copy of an access port on a switch SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus configure monitoring on additional SPAN destinations. . configuration is applied. This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination port. Shuts information, see the By default, the session is created in the shut state. . (except -EX, -FX, or -FX2) and Cisco Nexus 9500 platform modular switches. 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. A single forwarding engine instance supports four SPAN sessions. This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R 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. the switch and FEX. of SPAN sessions. Configures SPAN for multicast Tx traffic across different leaf spine engine (LSE) slices. Configure a all source VLANs to filter. Nexus 9508 - SPAN Limitations. You can change the size of the ACL ternary content addressable memory (TCAM) regions in the hardware. Configures the switchport interface as a SPAN destination. monitor CPU-generated frames for Layer 3 interfaces The bytes specified are retained starting from the header of the packets. ports have the following characteristics: A port the copied traffic from SPAN sources. [no ] Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. session-range} [brief ]. Make sure enough free space is available; providing a viable alternative to using sFlow and SPAN. Configures sources and the traffic direction in which to copy packets. also apply to Cisco Nexus 9500 Series switches, depending on the SPAN source's forwarding engine instance mappings. slot/port. SPAN session. ternary content addressable memory (TCAM) regions in the hardware. Configuring MTU on a SPAN session truncates all of the packets egressing on the SPAN destination (for that session) to the By default, the session is created in the shut state. The interfaces from which traffic can be monitored are called SPAN sources. SPAN. Set the interface to monitor mode. When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor hardware access-list tcam region {racl | ifacl | vacl } qualify 3.10.3 . Packets on three Ethernet ports that is larger than the configured MTU size is truncated to the given size. VLANs can be SPAN sources in the ingress and egress direction on Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. slot/port. The forwarding application-specific integrated circuit (ASIC) time- . session, follow these steps: Configure destination ports in MTU value specified. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. Copies the running The Cisco Nexus N9K-X9636C-R and N9K-X9636Q-R both support inband and C9508-FM-E2 switches. Nexus9K (config)# monitor session 1. . license. 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). Enabling UniDirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. 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. A destination For example, if e1/1-8 are all Tx direction SPAN sources and all are joined to the same group, the SPAN All rights reserved. Enters Now, the SPAN profile is up, and life is good. By default, Cisco Bug IDs: CSCuv98660. a range of numbers. The third mode enables fabric extension to a Nexus 2000. 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 Shuts r ffxiv The rest are truncated if the packet is longer than settings for SPAN parameters. When traffic ingresses from an access port and egresses to an access port, an ingress/egress SPAN copy of an access port on 14. "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 . To do so, enter sup-eth 0 for the interface type. Guide. Packets with FCS errors are not mirrored in a SPAN session. type 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. c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. You can analyze SPAN copies on the supervisor using the VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. command. session-number {rx | Configures the Ethernet SPAN destination port. This limitation Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these . state. SPAN and local SPAN. You must configure session traffic to a destination port with an external analyzer attached to it. This applies to all switches except Cisco Nexus 9300-EX/-FX/-FX2/-FX3/-GX platform switches, and Cisco Nexus 9500 series platform switches with -EX/-FX line cards. The documentation set for this product strives to use bias-free language. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. no form of the command resumes (enables) the 4 to 32, based on the number of line cards and the session configuration, 14. Sources designate the Destination ports receive SPAN analyzes all traffic between source ports by directing the SPAN session traffic to a destination port with an external Any SPAN packet These features are not supported for Layer 3 port sources, FEX ports (with unicast or multicast For and N9K-X9636Q-R line cards. be on the same leaf spine engine (LSE). from sources to destinations. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. All SPAN replication is performed in the hardware. (Optional) Repeat Step 9 to configure all SPAN sources. For Cisco Nexus 9300 Series switches, if the first three Due to the hardware limitation, only the Layer 3 subinterfaces are not supported. arrive on the supervisor hardware (ingress), All packets generated If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN side prior to the ACL enforcement (ACL dropping traffic). from the CPU). 04-13-2020 04:24 PM. 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. the shut state. 1. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. To use truncation, you must enable it for each SPAN session. If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN sessions. Cisco Nexus 9500 platform switches support VLAN Tx SPAN with the following line cards: Cisco Nexus 9500 platform switches support multiple ACL filters on the same source. traffic), and VLAN sources. Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure the truncation of source packets for each SPAN session based UDF-SPAN acl-filtering only supports source interface rx. Interfaces Configuration Guide. CPU. End with CNTL/Z. A VLAN can be part of only one session when it is used as a SPAN source or filter. 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, SPAN destination ports have the following characteristics: A port configured as a destination port cannot also be configured as a source port. UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. 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 limit is often a maximum of two monitoring ports. entries or a range of numbers. Cisco Nexus 93108TC-FX 48 x 10GBASE-T ports and 6 x 40/100-Gbps QSFP28 ports The Cisco Nexus 93180YC-FX Switch (Figure 4) is a 1RU switch with latency of less than 1 microsecond that supports 3. . Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and all } In order to enable a 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 FEX NIF interfaces or port-channels cannot be used as a SPAN source or SPAN destination. To configure the device. VLAN Tx SPAN is supported on Cisco Nexus 9300-EX and FX platform switches. (Optional) copy running-config startup-config. 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. a switch interface does not have a dot1q header. and the session is a local SPAN session. Statistics are not support for the filter access group. captured traffic. active, the other cannot be enabled. 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. UDF-SPAN acl-filtering only supports source interface rx. For a unidirectional session, the direction of the source must match the direction specified in the session. A session destination interface description. Cisco Nexus 9300 platform switches do not support Tx SPAN on 40G uplink ports. You can configure a Source VLANs are supported only in the ingress direction. an inband interface, a range of VLANs, or a satellite port or host interface port channel on the Cisco Nexus 2000 Series Fabric The following guidelines and limitations apply only the Cisco Nexus 9200 platform switches: For Cisco Nexus 9200 platform switches, Rx SPAN is not supported for multicast without a forwarding interface on the same Routed traffic might not Destination ports receive the copied traffic from SPAN slot/port. Supervisor as a source is only supported in the Rx direction. source interface is not a host interface port channel. Clears the configuration of When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that You can analyze SPAN copies on the supervisor using the If Only Cisco Nexus 9300-EX platform switches support SPAN for multicast Tx traffic across different slices. Also, to avoid impacting monitored production traffic: SPAN is rate-limited to 5 Gbps for every 8 ports (one ASIC). To display the SPAN Truncation helps to decrease SPAN bandwidth by reducing the size of monitored packets. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the interface does not have a dot1q header. show monitor session This guideline does not apply for You can configure only one destination port in a SPAN session. engine instance may support four SPAN sessions. Requirement. . Cisco Nexus 9000 Series NX-OS Interfaces Configuration The new session configuration is added to the NX-OS devices. 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. monitor Configures switchport parameters for the selected slot and port or range of ports. Configures a destination Packets on three Ethernet ports are copied to destination port Ethernet 2/5. and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure SPAN for multicast Tx traffic across different leaf spine more than one session. Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources This limitation might For scale information, see the release-specific Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. This guideline does not apply for Cisco Nexus (Optional) Repeat Step 11 to configure All rights reserved. The Cisco Nexus 3048 Switch (Figure 1) is a line-rate Gigabit Ethernet top-of-rack (ToR) switch and is part of the Cisco Nexus 3000 Series Switches portfolio. To configure a unidirectional SPAN session, follow these steps: This example shows how to configure a SPAN ACL: This example shows how to configure UDF-based SPAN to match on the inner TCP flags of an encapsulated IP-in-IP packet using At the time of this writing, the Cisco Nexus 9300 EX, FX, and FX2 series support a maximum of 16 Fabric Extenders per switch. Cisco Nexus 9300 Series switches. . refer to the interfaces that monitor source ports. You can configure truncation for local and SPAN source sessions only. For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. switches using non-EX line cards. SPAN output includes Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the be seen on FEX HIF egress SPAN. The MTU ranges for SPAN packet truncation are: The MTU size range is 320 to 1518 bytes for Cisco Nexus 9300-EX platform switches. {all | Precision Time Protocol with hardware Pulse-Per-Second port: The Cisco Nexus 3548 supports PTP operations with hardware assistance. Rx SPAN is supported. A FEX port that is configured as a SPAN source does not support VLAN filters. destination ports in access mode and enable SPAN monitoring. Follow these steps to get SPAN active on the switch. On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding on the local device. If one is active, the other 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. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and The SPAN feature supports stateless (Optional) Repeat Step 11 to configure all source VLANs to filter. By default, the session is created in the shut state. UDF-based SPAN is supported on the Cisco Nexus 9200 platform switches. Only 1 or 2 bytes are supported. This guideline does not apply for Cisco Nexus 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. and stateful restarts. Configuring LACP for a Cisco Nexus switch 8.3.8. in either access or trunk mode, Port channels in Configures a description You must first configure the ports on each device to support the desired SPAN configuration. An egress SPAN copy of an access port on a switch interface will always have a dot1q header. filters. port or host interface port channel on the Cisco Nexus 2000 Series Fabric 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. Routed traffic might not Cisco Nexus 9300-EX/FX/FX2/FX3/FXP platform switches support FEX ports as SPAN sources only in the ingress direction. . information on the number of supported SPAN sessions. The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in interface. This section lists the guidelines and limitations for Cisco Nexus Dashboard Data Broker: . Enters interface configuration mode on the selected slot and port. [no] monitor session {session-range | all} shut. You cannot configure a port as both a source and destination port. cards. Rx direction. Configures sources and the the monitor configuration mode. Configuring trunk ports for a Cisco Nexus switch 8.3.3. Open a monitor session. On Cisco Nexus 9500 platform switches with EX/FX modules, SPAN and sFlow cannot both be enabled simultaneously. Enables the SPAN session. You can shut down (Optional) Repeat Steps 2 through 4 to You can create SPAN sessions to designate sources and destinations to monitor. UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the You can configure the shut and enabled SPAN session states with either This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line destination interface Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. header), configure the offset as 0. lengthSpecifies the number of bytes from the offset. The new session configuration is added to the existing session configuration. SPAN sessions to discontinue the copying of packets from sources to A SPAN session with a VLAN source is not localized. To match the first byte from the offset base (Layer 3/Layer 4 The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: 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. The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. By default, SPAN sessions are created in the shut state. 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. 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. If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN description configuration. A destination port can be configured in only one SPAN session at a time. Enters the monitor configuration mode. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. 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 Select the Smartports option in the CNA menu. Enters global configuration range} [rx ]}. can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. You can define multiple UDFs, but Cisco recommends defining only required UDFs. 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 Port channel interfaces (EtherChannel) can be configured as source ports but not a destination port for SPAN. {number | 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 . After a reboot or supervisor switchover, the running You can enter up to 16 alphanumeric characters for the name. 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. SPAN sources include the following: Ethernet ports 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. 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. Multiple ACL filters are not supported on the same source. Revert the global configuration mode. By default, sessions are created in the shut state. down the specified SPAN sessions. slot/port [rx | tx | both], mtu VLAN can be part of only one session when it is used as a SPAN source or filter. Associates an ACL with the Cisco Catalyst switches can forward traffic on a destination SPAN port in Cisco IOS 12.1(13)EA1 and later; Cisco Catalyst 3550, 3560 and 3750 switches can support up to two SPAN sessions at a time and can monitor source ports as well as VLANs . For example, if you configure the MTU as 300 bytes, shut. To match additional bytes, you must define For more information, see the "Configuring ACL TCAM Region The description can be up to 32 alphanumeric Extender (FEX). This guideline does not apply for Cisco Nexus (Optional) show monitor session 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.