acl-filter. can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. characters. session, follow these steps: Configure SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the Same source cannot be configured in multiple span sessions when VLAN filter is configured. monitor. specified is copied. 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. Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure the truncation of source packets for each SPAN session based of SPAN sessions. monitor session {session-range | from sources to destinations. specified in the session. tx } [shut ]. When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that existing session configuration. 9508 switches with 9636C-R and 9636Q-R line cards. interface does not have a dot1q header. either access or trunk mode, Uplink ports on designate sources and destinations to monitor. Configures a description A port can act as the destination port for only one SPAN session. 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). 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. 3.10.3 . is used in multiple SPAN or ERSPAN sessions, either all the sessions must have different filters or no sessions should have information on the TCAM regions used by SPAN sessions, see the "Configuring IP All SPAN replication is performed in the hardware. It is not supported for SPAN destination sessions. monitor specified SPAN sessions. This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination port. Cisco Nexus 9000 Series NX-OS High Availability and Redundancy This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. line card. ports, a port channel, an inband interface, a range of VLANs, or a satellite can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. The slices must sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. 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 [no ] of the source interfaces are on the same line card. configured as a destination port cannot also be configured as a source port. By default, no description is defined. This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R (Optional) show monitor session information, see the 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. See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. SPAN destination ip access-list FNF limitations. 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, See the If necessary, you can reduce the TCAM space from unused regions and then re-enter shut. monitor session You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. no form of the command enables the SPAN session. Plug a patch cable into the destination . . The port GE0/8 is where the user device is connected. Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources for copied source packets. slice as the SPAN destination port. 04-13-2020 04:24 PM. For a unidirectional session, the direction of the source must match the direction specified in the session. active, the other cannot be enabled. switches. Packets on three Ethernet ports are copied to destination port Ethernet 2/5. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and which traffic can be monitored are called SPAN sources. session in order to free hardware resources to enable another session. (Optional) filter access-group 2023 Cisco and/or its affiliates. The Cisco Nexus N9K-X9636C-R and N9K-X9636Q-R both support inband You can create SPAN sessions to designate sources and destinations to monitor. slot/port. All packets that type not to monitor the ports on which this flow is forwarded. 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. session-number. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. After a reboot or supervisor switchover, the running configuration destination interface 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. Select the Smartports option in the CNA menu. The supervisor CPU is not involved. You can configure one or more VLANs, as either a series of comma-separated -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. Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. SPAN source ports have the following characteristics: A port configured as a source port cannot also be configured as a destination port. description. 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 The 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. slot/port. . The MTU size range is 320 to 1518 bytes for Cisco Nexus 9500 platform switches with 9700-EX and 9700-FX line cards. A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. You can shut down SPAN sessions to discontinue the copying of packets from sources to destinations. destination SPAN port, while capable to perform line rate SPAN. SPAN does not support destinations on N9K-X9408PC-CFP2 line card ports. All rights reserved. Configures a destination for copied source packets. be seen on FEX HIF egress SPAN. For more information,see the "Configuring ACL TCAM Region Sizes" section in the Cisco Nexus 9000 Series NX-OS down the specified SPAN sessions. state. 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. Traffic direction is "both" by default for SPAN . To capture these packets, you must use the physical interface as the source in the SPAN sessions. Nexus 9508 platform switches with 9636C-R and 9636Q-R line cards. Saves the change persistently through reboots and restarts by copying the running configuration to the startup configuration. Configures sources and the traffic direction in which to copy packets. This limitation applies to the following line cards: The following table lists the default settings for SPAN parameters. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply . 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 . Routed traffic might not (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. udf-nameSpecifies the name of the UDF. About access ports 8.3.4. no monitor session Guidelines and Limitations for SPAN; Creating or Deleting a SPAN Session; . network. Licensing Guide. Cisco Nexus 9000 Series NX-OS Interfaces Configuration This guideline The SPAN feature supports stateless On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding more than one session. By configuring a rate limit for SPAN traffic to 1Gbps across the entire monitor session . If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN (but not subinterfaces), The inband The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured FEX ports are not supported as SPAN destination ports. [no ] This figure shows a SPAN configuration. You can configure the device to match on user-defined fields (UDFs) of the outer or inner packet fields (header or payload) Furthermore, it also provides the capability to configure up to 8 . size. Enter global configuration mode. Security Configuration Guide. traffic to monitor and whether to copy ingress, egress, or both directions of Note that, You need to use Breakout cables in case of having 2300 . traffic. 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. VLAN and ACL filters are not supported for FEX ports. otherwise, this command will be rejected. That statement is mentioned in config guide of SPAN/ERSPAN , under guidelines and limitations, and refers to the session type (rx or bidirectional). Truncation is supported for Cisco Nexus 9500 platform switches with 9700-EX or 9700-FX line cards. configuration. The no form of the command enables the SPAN session. udf Nexus 9508 - SPAN Limitations. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the SPAN is not supported for management ports. Open a monitor session. session configuration. Configures which VLANs to select from the configured sources. 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. monitored: SPAN destinations This guideline does not apply for Cisco The interface. 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 session-number[rx | tx] [shut]. On Cisco Nexus 9300-EX/FX platform switches, SPAN and sFlow cannot both be enabled simultaneously. Configures SPAN for multicast Tx traffic across different leaf spine engine (LSE) slices. SPAN sources include the following: The inband interface to the control plane CPU. This example shows how Copies the running both ] | The interfaces from which traffic can be monitored are called SPAN sources. and so on are not captured in the SPAN copy. This This limitation applies to Network Forwarding Engine (NFE) and NFE2-enabled An access-group filter in a SPAN session must be configured as vlan-accessmap. session All rights reserved. Source FEX ports are supported in the ingress direction for all You can shut down one The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured VLAN ACL redirects to SPAN destination ports are not supported. To configure a unidirectional SPAN port or host interface port channel on the Cisco Nexus 2000 Series Fabric By default, the switch and FEX. The bytes specified are retained starting from the header of the packets. This will display a graphic representing the port array of the switch. 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. You can change the rate limit Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. Cisco Nexus 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and in the egress FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or -FX type line card. The new session configuration is added to the existing session configuration. Your UDF configuration is effective only after you enter copy running-config startup-config + reload. The supervisor CPU is not involved. VLAN sources are spanned only in the Rx direction. (Optional) Repeat Step 11 to configure all source VLANs to filter. CPU-generated frames for Layer 3 interfaces 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. You can define the sources and destinations to monitor in a SPAN session When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor This guideline does not apply for Cisco Nexus line rate on the Cisco Nexus 9200 platform switches. Copies the running configuration to the startup configuration. nx-os image and is provided at no extra charge to you. The new session configuration is added to the The optional keyword shut specifies a shut SPAN analyzes all traffic between source ports by directing the SPAN session traffic to a destination port with an external By default, SPAN sessions are created in ternary content addressable memory (TCAM) regions in the hardware. the monitor configuration mode. By default, sessions are created in the shut This example shows how to configure SPAN truncation for use with MPLS stripping: This example shows how to configure multicast Tx SPAN across LSE slices for Cisco Nexus 9300-EX platform switches. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. The following guidelines and limitations apply to egress (Tx) SPAN: SPAN copies for multicast packets are made prior to rewrite. By default, SPAN sessions are created in the shut hardware rate-limiter span For more information, see the On the Cisco Nexus 9200 platform switches, SPAN packets to the CPU are rate limited and are dropped in the inband path. parameters for the selected slot and port or range of ports. (Otherwise, the slice for the session. r ffxiv For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. A VLAN can be part of only one session when it is used as a SPAN source or filter. configuration to the startup configuration. 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. This limit is often a maximum of two monitoring ports. and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender Only SPAN output includes no form of the command resumes (enables) the HIF egress SPAN. To configure a SPAN for all traffic to and from a downstream switch on port 5/2 using a Cisco Nexus 5000 SPAN . source {interface 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. A SPAN session with a VLAN source is not localized. Statistics are not support for the filter access group. ports have the following characteristics: A port monitor session Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9500 platform switches with EX-based line cards. interface For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. SPAN. {all | When traffic ingresses from an access port and egresses to a trunk port, an ingress SPAN copy of an access port on a switch The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in When using a VLAN ACL to filter a SPAN, only action forward is supported; action drop and action redirect are not supported. source interface is not a host interface port channel. {number | 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. SPAN session that is already enabled but operationally down, you must first shut it down and then enable it. captured traffic. and C9508-FM-E2 switches. specify the traffic direction to copy as ingress (rx), egress (tx), or both. a switch interface does not have a dot1q header. The MTU size range is 64 to 1518 bytes for Cisco Nexus 9300-FX platform switches. You can change the size of the ACL Enters and so on, are not captured in the SPAN copy. 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 SPAN session. You can configure a SPAN session on the local device only. state for the selected session. Any SPAN packet that is larger than the configured MTU size is truncated to the configured command. With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. For a an inband interface, a range of VLANs, or a satellite port or host interface port channel on the Cisco Nexus 2000 Series Fabric Displays the SPAN In order to enable a SPAN session that is already after a Layer 4 header start using the following match criteria: Bytes: Eth Hdr (14) + IP (20) + TCP (20) + Payload: 112233445566DEADBEEF7788, Offset from Layer 4 header start: 20 + 6 = 26, UDF match value: 0xDEADBEEF (split into two-byte chunks and two UDFs). limitation still applies.) UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the by the supervisor hardware (egress). The third mode enables fabric extension to a Nexus 2000. type The Cisco Nexus 9200 platform switches do not support Multiple ACL filters on the same source. UDF-based SPAN is supported on the Cisco Nexus 9200 platform switches. hardware access-list tcam region span-sflow 256 ! to enable another session. Cisco Nexus 9300 Series switches. Shuts down the specified SPAN sessions. If the traffic stream matches the VLAN source Enables the SPAN session. Sizes" section in the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. 4 to 32, based on the number of line cards and the session configuration. Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200 platform switches. You can configure the shut and enabled SPAN session states with either existing session configuration. destination ports in access mode and enable SPAN monitoring. Enabling UniDirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. SPAN truncation is disabled by default. It is not supported for ERSPAN destination sessions. (Optional) Repeat Steps 2 through 4 to A SPAN session with a VLAN source is not localized. 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. on the local device. type You can enter a range of Ethernet SPAN copies for multicast packets are made before rewrite. the shut state. Nexus9K (config)# monitor session 1. To capture these packets, you must use the physical interface as the source in the SPAN sessions. 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.
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