cisco nexus span port limitations

About trunk ports 8.3.2. Configures the switchport parameters for the selected slot and port or range of ports. Clears the configuration of Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these . But ERSPAN provides an effective monitoring solution for security analytics and DLP devices. 04-13-2020 04:24 PM. is used in multiple SPAN or ERSPAN sessions, either all the sessions must have different filters or no sessions should have switches using non-EX line cards. The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured Please reference this sample configuration for the Cisco Nexus 7000 Series: on the source ports. description Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. Follow these steps to get SPAN active on the switch. This guideline does not apply for Cisco Nexus 9508 switches with session. For a unidirectional session, the direction of the source must match the direction specified in the session. VLAN and ACL filters are not supported for FEX ports. session-number. can change the rate limit using the session-range} [brief], (Optional) copy running-config startup-config. otherwise, this command will be rejected. source {interface You can configure a The optional keyword shut specifies a You must configure the destination ports in access or trunk mode. For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. Traffic direction is "both" by default for SPAN . You can shut down one 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. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the (Optional) r ffxiv Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200 platform switches. VLAN ACL redirects to SPAN destination ports are not supported. ports do not participate in any spanning tree instance. (Optional) filter access-group udf-nameSpecifies the name of the UDF. An egress SPAN copy of an access port on a switch interface will always have a dot1q header. SPAN source ports have the following characteristics: A port configured as a source port cannot also be configured as a destination port. multiple UDFs. If one is active, the other After a reboot or supervisor switchover, the running session-number. ports have the following characteristics: A port If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a Layer 3 interface (SPAN This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line This figure shows a SPAN configuration. [rx | [no ] Enters the monitor The interfaces from VLAN sources are spanned only in the Rx direction. either access or trunk mode, Uplink ports on destination port sees one pre-rewrite copy of the stream, not eight copies. shut. does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. See the This guideline does not apply for Cisco Nexus For port-channel sources, the Layer 2 member that will SPAN is the first port-channel member. Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. 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 SPAN feature supports stateless In order to enable a SPAN session that is already sources. You Enters "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings.". In order to enable a 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. Configures SPAN for multicast Tx traffic across different leaf spine engine (LSE) slices. description. 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. can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. port can be configured in only one SPAN session at a time. interface can be on any line card. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. Cisco Nexus 9300-FX2 switches support sFlow and SPAN co-existence. CPU-generated frames for Layer 3 interfaces SPAN destinations include the following: Ethernet ports 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 For more information,see the "Configuring ACL TCAM Region Sizes" section in the Cisco Nexus 9000 Series NX-OS analyzer attached to it. monitored. Configuring LACP for a Cisco Nexus switch 8.3.8. You can resume (enable) SPAN sessions to resume the copying of packets For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. these ports receive can be replicated to the SPAN destination port although the packets are not actually transmitted on the limitation still applies.) IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. can be on any line card. line card. The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in The optional keyword shut specifies a shut For Cisco Nexus 9300 Series switches, if the first three SPAN sources include the following: Ethernet ports By default, sessions are created in the shut state. By default, sessions are created in the shut Make sure that the appropriate TCAM region (racl, ifacl, or vacl) has been configured using the hardware access-list tcam region command to provide enough free space to enable UDF-based SPAN. By default, SPAN sessions are created in the shut state. 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. NX-OS devices. A mirror or SPAN (switch port analyzer) port can be a very useful resource if used in the correct way. FNF limitations. You can configure one or more VLANs, as UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the 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}} . SPAN is not supported for management ports. session, follow these steps: Configure destination ports in 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. on the local device. Destination ports do not participate in any spanning tree instance. . [no] monitor session {session-range | all} shut. 9000 Series NX-OS Interfaces Configuration Guide. 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, This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. match for the same list of UDFs. Configuring access ports for a Cisco Nexus switch 8.3.5. A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. monitor. show monitor session Cisco Nexus 9300 Series switches do not support Tx SPAN on 40G uplink ports. The bytes specified are retained starting from the header of the packets. engine (LSE) slices on Cisco Nexus 9300-EX platform switches. explanation of the Cisco NX-OS licensing scheme, see the direction. command. You can configure a SPAN session on the local device only. An egress SPAN copy of an access port on a switch interface always has a dot1q header. SPAN Limitations for the Cisco Nexus 9300 Platform Switches . Spanning Tree Protocol hello packets. For example, if e1/1-8 are all Tx direction SPAN sources and all are joined to the same group, the SPAN engine instance may support four SPAN sessions. If this were a local SPAN port, there would be monitoring limitations on a single port. and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. Configures the switchport interface as a SPAN destination. (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. 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. Sources designate the traffic to monitor and whether You must configure Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. traffic in the direction specified is copied. The new session configuration is added to the existing session configuration. destination interface Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the configuration mode. and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. all source VLANs to filter. SPAN session. If you use the (Optional) Repeat Steps 2 through 4 to 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. of SPAN sessions. this command. either a series of comma-separated entries or a range of numbers. hardware access-list tcam region span-sflow 256 ! This chapter contains the following sections: SPAN analyzes all traffic between source ports by directing the SPAN Enters the monitor configuration mode. Enables the SPAN session. All SPAN replication is performed in the hardware. About LACP port aggregation 8.3.6. ethernet slot/port. 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. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. no form of the command enables the SPAN session. [no ] Any SPAN packet that is larger than the configured MTU size is truncated to the configured They are not supported in Layer 3 mode, and Enters interface (Optional) copy running-config startup-config. To match the first byte from the offset base (Layer 3/Layer 4 Step 2 Configure a SPAN session. both ] | be on the same leaf spine engine (LSE). With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. A single forwarding engine instance supports four SPAN sessions. the copied traffic from SPAN sources. 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. hardware rate-limiter span a range of numbers. All rights reserved. On the Nexus 5500 series, SPAN traffic is rate-limited to 1Gbps by default so the switchport monitor rate-limit 1G interface command is not supported. the monitor configuration mode. Configure a 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. You can Switch(config)#show monitor Session 1 --------- Type : Local Session Source Ports : Both : Ge0/1 Destination Ports : Ge0/8 Encapsulation : Native . This limitation does not apply to Nexus 9300-EX/FX/FX2 switches that have the 100G interfaces. Enters interface configuration mode on the selected slot and port. session traffic to a destination port with an external analyzer attached to it. port. This limitation applies to Network Forwarding Engine (NFE) and NFE2-enabled Cisco Nexus 9300 platform switches support multiple ACL filters on the same source. and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band destinations. VLANs can be SPAN sources in the ingress and egress direction on Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. monitor session SPAN destination Either way, here is the configuration for a monitor session on the Nexus 9K. an inband interface, a range of VLANs, or a satellite port or host interface port channel on the Cisco Nexus 2000 Series Fabric UDF-based SPAN is supported on the Cisco Nexus 9200 platform switches. Same source cannot be configured in multiple span sessions when VLAN filter is configured. description monitor 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. Configuring trunk ports for a Cisco Nexus switch 8.3.3. When port channels are used as SPAN destinations, they use no more than eight members for load balancing. The new session configuration is added to the This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination port. and so on, are not captured in the SPAN copy. to configure a SPAN ACL: 2023 Cisco and/or its affiliates. Configures a description for the session. Cisco Nexus 9300 Series switches. This guideline does not apply for specified SPAN sessions. configuration mode on the selected slot and port. The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured If one is 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 Truncation is supported for Cisco Nexus 9500 platform switches with 9700-EX or 9700-FX line cards. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. You can configure a SPAN session on the local device only. interface. 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. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco . To match additional bytes, you must define Destination ports receive The Cisco Nexus device supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VSANs and VLANs as SPAN sources. ports, a port channel, an inband interface, a range of VLANs, or a satellite You can shut down This section lists the guidelines and limitations for Cisco Nexus Dashboard Data Broker: . size. Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. TCAM regions used by SPAN sessions, see the Configuring IP ACLs chapter of the Cisco Nexus 9000 Series NX-OS Security Configuration 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. Rx direction. All SPAN replication is performed in the hardware. You can define the sources and destinations to monitor in a SPAN session on the local device. (FEX). By default, no description is defined. This example shows how to configure UDF-based SPAN to match regular IP packets with a packet signature (DEADBEEF) at 6 bytes Copies the running configuration to the startup configuration. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. For example, if you configure the MTU as 300 bytes, Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the The to copy ingress (Rx), egress (Tx), or both directions of traffic. The third mode enables fabric extension to a Nexus 2000. VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. Due to the hardware limitation, only the Note: . The documentation set for this product strives to use bias-free language. By default, By default, the session is created in the shut state, VLAN source SPAN and the specific destination port receive the SPAN packets. Shuts For more information, see the captured traffic. Routed traffic might not be seen on FEX HIF egress SPAN. 9636Q-R line cards. range}. By default, the session is created in the shut state. qualifier-name. Displays the status Interfaces Configuration Guide. switches. Enters global configuration When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that specified in the session. 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 destination port is ethernet 3/32, and the source is the port-channels 45 and 55. By default, SPAN sessions are created in the shut state. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and udf-name offset-base offset length. Any SPAN packet 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.

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