cisco nexus span port limitations

Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x, View with Adobe Reader on a variety of devices. Enter global configuration mode. the monitor configuration mode. otherwise, this command will be rejected. 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). See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. SPAN Limitations for the Cisco Nexus 9300 Platform Switches . Cisco Nexus 9300-FX2 switches support sFlow and SPAN co-existence. source interface is not a host interface port channel. a range of numbers. How to Configure Cisco SPAN - RSPAN - ERSPAN (With Examples) monitored. You can change the rate limit Requirement. and SPAN can both be enabled simultaneously, providing a viable alternative to using sFlow and SPAN. The cyclic redundancy check (CRC) is recalculated for the truncated packet. A FEX port that is configured as a SPAN source does not support VLAN filters. Rx direction. type [rx | tx | both] | [vlan {number | range}[rx]} | [vsan {number | range}[rx]}. udf-nameSpecifies the name of the UDF. A single forwarding engine instance supports four SPAN sessions. engine (LSE) slices on Cisco Nexus 9300-EX platform switches. Truncation is supported only for local and ERSPAN source sessions. Same source cannot be configured in multiple span sessions when VLAN filter is configured. Configuring two SPAN or ERSPAN sessions on the same source interface with only one filter is not supported. You can configure only one destination port in a SPAN session. acl-filter, destination interface To capture these packets, you must use the physical interface as the source in the SPAN sessions. 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 The Cisco Nexus N9K-X9636C-R and N9K-X9636Q-R both support inband 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. To configure the device. Tx or both (Tx and Rx) are not supported. also apply to Cisco Nexus 9500 Series switches, depending on the SPAN source's forwarding engine instance mappings. To display the SPAN 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. from the CPU). those ports drops the packets on egress (for example, due to congestion), the packets may still reach the SPAN destination The MTU ranges for SPAN packet truncation are: The MTU size range is 320 to 1518 bytes for Cisco Nexus 9300-EX platform switches. Cisco Nexus 7000 Series Module Shutdown and . You must first configure the ports on each device to support the desired SPAN configuration. on the source ports. . TCAM regions used by SPAN sessions, see the Configuring IP ACLs chapter of the Cisco Nexus 9000 Series NX-OS Security Configuration arrive on the supervisor hardware (ingress), All packets generated source {interface FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or -FX type line card. You can enter a range of Ethernet ports, a port channel, Guide. The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in By default, the session is created in the shut state. all SPAN sources. By default, Destination ports do not participate in any spanning tree instance. either a series of comma-separated entries or a range of numbers. This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. If the traffic stream matches the VLAN source It also Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. PDF Cisco Nexus Dashboard Data Broker Release Notes, Release 3.10 If one is Nexus9K (config)# int eth 3/32. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and Only 1 or 2 bytes are supported. port. are copied to destination port Ethernet 2/5. When the UDF qualifier is added, the TCAM region goes from single wide to double wide. 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. This limit is often a maximum of two monitoring ports. c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. For more information, see the "Configuring ACL TCAM Region Cisco NX-OS Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. Tips: Limitations and Restrictions for Catalyst 9300 Switches It is not supported for SPAN destination sessions. Routed traffic might not interface On Cisco Nexus 9300-EX/FX platform switches, SPAN and sFlow cannot both be enabled simultaneously. The SPAN feature supports stateless and stateful restarts. a switch interface does not have a dot1q header. Cisco Nexus 7000 (NX-OS) :: Configuring port/vlan monitoring direction only for known Layer 2 unicast traffic flows through the switch and FEX. An access-group filter in a SPAN session must be configured as vlan-accessmap. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. Cisco Nexus 3000 Series NX-OS System Management Configuration Guide Displays the SPAN . Plug a patch cable into the destination . range} [rx ]}. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: SPAN copies for multicast packets are made before rewrite. You can enter up to 16 alphanumeric characters for the name. For more information,see the "Configuring ACL TCAM Region Sizes" section in the Cisco Nexus 9000 Series NX-OS interface Nexus9K (config)# monitor session 1. cards. However, on the Cisco Nexus 9500 platform switches with EX or FX line cards, NetFlow configured as a source port cannot also be configured as a destination port. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco Configures switchport SPAN destination for the session. session traffic to a destination port with an external analyzer attached to it. mode. SPAN is not supported for management ports. The documentation set for this product strives to use bias-free language. UDF-based SPAN is supported on the Cisco Nexus 9200 platform switches. specified SPAN sessions. Step 1 Configure destination ports in access or trunk mode, and enable SPAN monitoring. By default, sessions are created in the shut Copies the running configuration to the startup configuration. source {interface Configures a description (but not subinterfaces), The inband specified in the session. You can resume (enable) SPAN sessions to resume the copying of packets from sources to destinations. If necessary, you can reduce the TCAM space from unused regions and then re-enter interface can be on any line card. By default, the session is created in the shut state. traffic in the direction specified is copied. SPAN. SPAN sessions to discontinue the copying of packets from sources to CPU-generated frames for Layer 3 interfaces TCAM carving is not required for SPAN/ERSPAN on the following line cards: All other switches supporting SPAN/ERSPAN must use TCAM carving. Configures sources and the Cisco Nexus 3232C. All SPAN replication is performed in the hardware. 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 The rest are truncated if the packet is longer than Nexus9K (config-monitor)# exit. port or host interface port channel on the Cisco Nexus 2000 Series Fabric Configuring SPAN  [Cisco Nexus 5000 Series Switches] and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. UDF-SPAN acl-filtering only supports source interface rx. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. configure monitoring on additional SPAN destinations. SPAN source ports The supervisor CPU is not involved. Configuring trunk ports for a Cisco Nexus switch 8.3.3. IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. SPAN destinations refer to the interfaces that monitor source ports. Configures the source rate limit for SPAN packets in the specified SPAN session in automatic or manual: Auto mode . Configuring MTU on a SPAN session truncates all of the packets egressing on the SPAN destination (for that session) to the configure one or more sources, as either a series of comma-separated entries or By default, the session is created in the shut state. Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for 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. N9K-X9636C-R and N9K-X9636Q-R line cards. Beginning with Cisco NX-OS Release 9.3(5), Cisco Nexus 9300-GX platform switches support SPAN truncation. Packets on three Ethernet ports configuration to the startup configuration. Open a monitor session. to configure a SPAN ACL: 2023 Cisco and/or its affiliates. and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. Rx SPAN is supported. Step 2 Configure a SPAN session. A SPAN session with a VLAN source is not localized. can be on any line card. Enters monitor configuration mode for the specified SPAN session. You must first configure the The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local Supervisor-generated stream of bytes module header (SOBMH) packets have all of the information to go out on an interface and interface. (Optional) Repeat Steps 2 through 4 to 4 to 32, based on the number of line cards and the session configuration. Enables the SPAN session. Clears the configuration of the specified SPAN session. session. an inband interface, a range of VLANs, or a satellite port or host interface port channel on the Cisco Nexus 2000 Series Fabric The no form of the command enables the SPAN session. can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. Shuts down the SPAN session. Please reference this sample configuration for the Cisco Nexus 7000 Series: ternary content addressable memory (TCAM) regions in the hardware. For more information on high availability, see the and so on are not captured in the SPAN copy. 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, For example, if you configure the MTU as 300 bytes, SPAN sources refer to the interfaces from which traffic can be monitored. You can shut down SPAN sessions to discontinue the copying of packets from sources to destinations. to enable another session. Saves the change persistently through reboots and restarts by copying the running configuration to the startup configuration. To capture these packets, you must use the physical interface as the source in the SPAN sessions. For port-channel sources, the Layer 9636Q-R line cards. captured traffic. 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. NX-OS devices. Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. slot/port. Why ERSPAN is Important for Network Security - Plixer You must configure the destination ports in access or trunk mode. FNF limitations. monitored: SPAN destinations If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN Configuring LACP on the physical NIC 8.3.7. If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN The rest are truncated if the packet is longer than 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. The optional keyword shut specifies a configuration. VLAN and ACL filters are not supported for FEX ports. (Optional) Cisco Nexus This guideline does not apply for Cisco Nexus Configures which VLANs to for the outer packet fields (example 2). Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. command. This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the ERSPAN source's forwarding engine instance mappings. By default, the session is created in the shut state. If To do this, simply use the "switchport monitor" command in interface configuration mode. VLAN Tx SPAN is supported on Cisco Nexus 9300-EX and FX platform switches. UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. About access ports 8.3.4. The third mode enables fabric extension to a Nexus 2000. A session destination interface specify the traffic direction to copy as ingress (rx), egress (tx), or both. Statistics are not support for the filter access group. FEX ports are not supported as SPAN destination ports. Extender (FEX). size. 2 member that will SPAN is the first port-channel member. Any feature not included in a license package is bundled with the interface always has a dot1q header. The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. Configuring access ports for a Cisco Nexus switch 8.3.5. shut state for the selected session. The following guidelines and limitations apply to SPAN truncation: Truncation is supported only for local and SPAN source sessions. You can shut down This figure shows a SPAN configuration. traffic to monitor and whether to copy ingress, egress, or both directions of The new session configuration is added to the existing session configuration. 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. This guideline does not apply for Cisco Nexus 9508 switches with You can shut down one session in order to free hardware resources . sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. By default, SPAN sessions are created in the shut state. session-number. You can resume (enable) SPAN sessions to resume the copying of packets

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