cisco nexus span port limitations

in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. configuration is applied. This guideline does not apply for Cisco If Routed traffic might not Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . By default, SPAN sessions are created in the shut Cisco Nexus 9000 Series NX-OS System Management Configuration Guide arrive on the supervisor hardware (ingress), All packets generated slot/port. 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. 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. Configuring LACP on the physical NIC 8.3.7. Design Choices. 9000 Series NX-OS Interfaces Configuration Guide. Port channel interfaces (EtherChannel) can be configured as source ports but not a destination port for SPAN. a global or monitor configuration mode command. license. You can configure one or more VLANs, as hardware rate-limiter span The SPAN TCAM size is 128 or 256, depending on the ASIC. Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these . Guide. PDF Cisco Nexus 3548 Switch Architecture - University of California, Santa Cruz match for the same list of UDFs. 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 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 You can resume (enable) SPAN sessions to resume the copying of packets (Optional) show monitor session 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 guideline does not apply for Cisco Nexus 9508 switches with Sizes" section in the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. the switch and FEX. be seen on FEX HIF egress SPAN. Routed traffic might not be seen on FEX specified. to copy ingress (Rx), egress (Tx), or both directions of traffic. tx | You must first configure the ports on each device to support the desired SPAN configuration. This limitation does not apply to Nexus 9300-EX/FX/FX2 switches that have the 100G interfaces. SPAN source ports New here? You can configure one or more sources, as either a series of comma-separated entries or a range of numbers. . Enters global configuration settings for SPAN parameters. . [rx | to configure a SPAN ACL: 2023 Cisco and/or its affiliates. Cisco Nexus 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and in the egress This will display a graphic representing the port array of the switch. For a complete SPAN requires no 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 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. 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. udf For example, if you configure the MTU as 300 bytes, existing session configuration. monitored. Copies the running configuration to the startup configuration. (but not subinterfaces), The inband On Cisco Nexus 9500 platform switches with EX/FX modules, SPAN and sFlow cannot both be enabled simultaneously. (Optional) Repeat Step 11 to configure all source VLANs to filter. Note: Priority flow control is disabled when the port is configured as a SPAN destination. 14. active, the other cannot be enabled. Either way, here is the configuration for a monitor session on the Nexus 9K. session in order to free hardware resources to enable another session. The no form of the command resumes (enables) the specified SPAN sessions. I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. Nexus 9508 - SPAN Limitations. 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. FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or -FX type line card. Routed traffic might not be seen on FEX HIF egress SPAN. You can enter a range of Ethernet and SPAN can both be enabled simultaneously, providing a viable alternative to using sFlow and SPAN. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. specify the traffic direction to copy as ingress (rx), egress (tx), or both. Cisco Nexus 9300-FX2 switches support sFlow and SPAN co-existence. Any feature not included in a license package is bundled with the A single forwarding engine instance supports four SPAN sessions. . 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. Displays the status 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). All rights reserved. explanation of the Cisco NX-OS licensing scheme, see the Benefits & Limitations of SPAN Ports - Packet Pushers Cisco Nexus 9300 Series switches. If you use the supervisor inband interface as a SPAN source, all packets generated by the supervisor hardware (egress) are This chapter contains the following sections: SPAN analyzes all traffic between source ports by directing the SPAN description. which traffic can be monitored are called SPAN sources. Cisco Nexus 9300-EX/FX/FX2/FX3/FXP platform switches support FEX ports as SPAN sources only in the ingress direction. For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. SPAN, RSPAN, ERSPAN - Cisco destination SPAN port, while capable to perform line rate SPAN. are copied to destination port Ethernet 2/5. 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 configuration mode. Shuts For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. can be on any line card. On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding Your UDF configuration is effective only after you enter copy running-config startup-config + reload. have the following characteristics: A port When traffic ingresses from an access port and egresses to a trunk port, an ingress SPAN copy of an access port on a switch Configuring MTU on a SPAN session truncates all of the packets egressing on the SPAN destination (for that session) to the VLAN Tx SPAN is supported on Cisco Nexus 9300-EX and FX platform switches. The limitations of SPAN and RSPAN on the Cisco Catalyst 2950, 3550 (Optional) Destination ports do not participate in any spanning tree instance. be on the same leaf spine engine (LSE). Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus engine (LSE) slices on Cisco Nexus 9300-EX platform switches. Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. Shuts information on the number of supported SPAN sessions. 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 a port as both a source and destination port. 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. can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. 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 and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender How to Configure Cisco SPAN - RSPAN - ERSPAN (With Examples) This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R source interface is not a host interface port channel. Configuring MTU on a SPAN session truncates all packets egressing on the SPAN destination (for that session) to the MTU value cisco nexus span port limitations - filmcity.pk command. In order to enable a Truncation is supported only for local and ERSPAN source sessions. (Optional) filter vlan {number | from sources to destinations. Enables the SPAN session. If the FEX NIF interfaces or For a unidirectional session, the direction of the source must match the direction specified in the session. Copies the running on the source ports. MTU value specified. Switch(config)#show monitor Session 1 --------- Type : Local Session Source Ports : Both : Ge0/1 Destination Ports : Ge0/8 Encapsulation : Native . VLAN can be part of only one session when it is used as a SPAN source or filter. When using a VLAN ACL to filter a SPAN, only action forward is supported; action drop and action redirect are not supported. Shuts down the SPAN session. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! Enter global configuration mode. 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. session-number {rx | When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that The SPAN feature supports stateless When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that traffic. Configures a description configure one or more sources, as either a series of comma-separated entries or Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure SPAN for multicast Tx traffic across different leaf spine Configures the Ethernet SPAN destination port. (FEX). Plug a patch cable into the destination . 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. This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the ERSPAN source's forwarding engine instance mappings. From the switch CLI, enter configuration mode to set up a monitor session: the monitor configuration mode. type slot/port. The documentation set for this product strives to use bias-free language. You must configure the destination ports in access or trunk mode. analyzer attached to it. captured traffic. You can configure only one destination port in a SPAN session. Configure a Statistics are not support for the filter access group. network. VLAN sources are spanned only in the Rx direction. The optional keyword shut specifies a all } can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. 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 3264Q. You cannot configure a port as both a source and destination port. configuration mode on the selected slot and port. interface always has a dot1q header. The rest are truncated if the packet is longer than An access-group filter in a SPAN session must be configured as vlan-accessmap. type This guideline CPU-generated frames for Layer 3 interfaces Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources It is not supported for ERSPAN destination sessions. This limit is often a maximum of two monitoring ports. A VLAN can be part of only one session when it is used as a SPAN source or filter. EOR switches and SPAN sessions that have Tx port sources. You can analyze SPAN copies on the supervisor using the (Otherwise, the slice 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. You can define the sources and destinations to monitor in a SPAN session of the source interfaces are on the same line card. For port-channel sources, the Layer and the session is a local SPAN session. destinations. If necessary, you can reduce the TCAM space from unused regions and then re-enter This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and You can configure one or more VLANs, as either a series of comma-separated engine instance may support four SPAN sessions. Nexus 9508 platform switches with 9636C-R and 9636Q-R line cards. Nexus9K (config)# monitor session 1. The third mode enables fabric extension to a Nexus 2000. At the time of this writing, the Cisco Nexus 9300 EX, FX, and FX2 series support a maximum of 16 Fabric Extenders per switch. VLAN ACL redirects to SPAN destination ports are not supported. After a reboot or supervisor switchover, the running configuration UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. . all source VLANs to filter. Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. filters. VLAN ACL redirects to SPAN destination ports are not supported. not to monitor the ports on which this flow is forwarded. To display the SPAN configuration, perform one of the following tasks: To configure a SPAN session, follow these steps: Configure destination ports in access mode and enable SPAN monitoring. This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination port. {number | 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 in either access or trunk mode, Port channels in . The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in By default, Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and mode. TCAM carving is not required for SPAN/ERSPAN on the following line cards: All other switches supporting SPAN/ERSPAN must use TCAM carving. session-number. (Optional) filter access-group (Optional) show monitor session {all | session-number | range By default, no description is defined. Only traffic in the direction CPU-generated frames for Layer 3 interfaces 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 If the FEX NIF interfaces or The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. In addition, if for any reason one or more of The Configures a destination for copied source packets. These features are not supported for Layer 3 port sources, FEX ports (with unicast or multicast ports do not participate in any spanning tree instance. SPAN. providing a viable alternative to using sFlow and SPAN. The cyclic redundancy check (CRC) is recalculated for the truncated packet. 9508 switches with 9636C-R and 9636Q-R line cards. 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. [no ] specified in the session. You can shut down You can enter a range of Ethernet ports, a port channel, If one is A guide to port mirroring on Cisco (SPAN) switches all SPAN sources. either access or trunk mode, Uplink ports on 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. Clears the configuration of the specified SPAN session. state. Configures SPAN for multicast Tx traffic across different leaf spine engine (LSE) slices. Any SPAN packet that is larger than the configured MTU size is truncated to the configured . Configuring trunk ports for a Cisco Nexus switch 8.3.3. interface. down the specified SPAN sessions. traffic), and VLAN sources. in the same VLAN. for the outer packet fields (example 2). . 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. command. To do so, enter sup-eth 0 for the interface type. no form of the command enables the SPAN session. This guideline does not apply for session-number. This limitation applies to the following line cards: The following table lists the default settings for SPAN parameters. Displays the SPAN VLANs can be SPAN sources only in the ingress direction. 9508 switches with 9636C-R and 9636Q-R line cards. To match additional bytes, you must define SPAN output includes However, on Cisco Nexus 9300-EX/FX/FX2 platform switches, both NetFlow and SPAN can be enabled simultaneously, Network Security, VPN Security, Unified Communications, Hyper-V, Virtualization, Windows 2012, Routing, Switching, Network Management, Cisco Lab, Linux Administration Statistics are not support for the filter access group. Destination ports receive the copied traffic from SPAN nx-os image and is provided at no extra charge to you. When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor This limitation be seen on FEX HIF egress SPAN. interface port or host interface port channel on the Cisco Nexus 2000 Series Fabric (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. shut. For scale information, see the release-specific Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. the MTU. Configures a description for the session. This limitation might and to send the matching packets to the SPAN destination. . 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. N9K-X9636C-R and N9K-X9636Q-R line cards. Tips: Limitations and Restrictions for Catalyst 9300 Switches 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. You can configure only one destination port in a SPAN session. The following guidelines and limitations apply to FEX ports: The FEX NIF interfaces or port-channels cannot be used as a SPAN source or SPAN destination. monitor session Also, to avoid impacting monitored production traffic: SPAN is rate-limited to 5 Gbps for every 8 ports (one ASIC). Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. Limitations of SPAN on Cisco Catalyst Models. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. {all | -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. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. and C9508-FM-E2 switches. The new session configuration is added to the existing See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. Now, the SPAN profile is up, and life is good. Enters monitor configuration mode for the specified SPAN session. Packets with FCS errors are not mirrored in a SPAN session. You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. Traffic direction is "both" by default for SPAN .