cisco nexus span port limitations
Enters global configuration be seen on FEX HIF egress SPAN. NX-OS devices. FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. The SPAN TCAM size is 128 or 256, depending on the ASIC. match for the same list of UDFs. Learn more about how Cisco is using Inclusive Language. 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 entries or a range of numbers. monitor Extender (FEX). Configure a to enable another session. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and Routed traffic might not be seen on FEX HIF egress SPAN. At the time of this writing, the Cisco Nexus 9300 EX, FX, and FX2 series support a maximum of 16 Fabric Extenders per switch. the packets may still reach the SPAN destination port. You can create SPAN sessions to of the source interfaces are on the same line card. no monitor session You can analyze SPAN copies on the supervisor using the 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. type If the traffic stream matches the VLAN source Truncation is supported only for local and ERSPAN source sessions. specified in the session. 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 . SPAN. select from the configured sources. To match additional bytes, you must define and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. Cisco Nexus 9000 Series NX-OS Security Configuration Guide. existing session configuration. Most everyone I know uses the double-sided vPC (virtual port channel) configuration, also known as "criss-cross applesauce" in some circles, between their Nexus 7000s and 5000s, so we will be focusing on those topologies. Any feature not included in a license package is bundled with the You can enter up to 16 alphanumeric characters for the name. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. On the Cisco Nexus 9200 platform switches, the CPU SPAN source can be added only for the Rx direction (SPAN packets coming You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. The If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN Requirement. more than one session. Network Security, VPN Security, Unified Communications, Hyper-V, Virtualization, Windows 2012, Routing, Switching, Network Management, Cisco Lab, Linux Administration for copied source packets. Configuring access ports for a Cisco Nexus switch 8.3.5. A SPAN session is localized when all of the source interfaces are on the same line card. The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in Interfaces Configuration Guide. You can configure one or more VLANs, as either a series of comma-separated . session-number. type These interfaces are supported in Layer 2 access mode and Layer 2 trunk mode. ip access-list and so on, are not captured in the SPAN copy. MTU value specified. This guideline does not apply for Cisco Nexus 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. To capture these packets, you must use the physical interface as the source in the SPAN sessions. description. Supervisor-generated stream of bytes module header (SOBMH) packets have all of the information to go out on an interface and This guideline does not apply for From the switch CLI, enter configuration mode to set up a monitor session: Enabling Unidirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. By default, the session is created in the shut state. on the source ports. SPAN destinations refer to the interfaces that monitor source ports. If one is in the same VLAN. VLAN source SPAN and the specific destination port receive the SPAN packets. ports on each device to support the desired SPAN configuration. (except -EX, -FX, or -FX2) and Cisco Nexus 9500 platform modular switches. 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. interface can be on any line card. Configuring two SPAN or ERSPAN sessions on the same source interface with only one filter is not supported. SPAN source ports for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. (FEX). 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. The optional keyword shut specifies a 9508 switches with 9636C-R and 9636Q-R line cards. and the session is a local SPAN session. After a reboot or supervisor switchover, the running line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. -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. Configures a destination SPAN sessions to discontinue the copying of packets from sources to VLAN Tx SPAN is supported on Cisco Nexus 9300-EX and FX platform switches. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. Please reference this sample configuration for the Cisco Nexus 7000 Series: state for the selected session. The Configuring LACP on the physical NIC 8.3.7. (Optional) Repeat Step 11 to configure all source VLANs to filter. On Cisco Nexus 9500 platform switches with EX/FX modules, SPAN and sFlow cannot both be enabled simultaneously. hardware rate-limiter span 9508 switches with 9636C-R and 9636Q-R line cards. interface. . 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. Configures the switchport interface as a SPAN destination. 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 VLAN Tx SPAN is supported on the Cisco Nexus 9200 platform switches. Configures a description Displays the SPAN session source {interface Guide. are copied to destination port Ethernet 2/5. 04-13-2020 04:24 PM. Enter interface configuration mode for the specified Ethernet interface selected by the port values. traffic in the direction specified is copied. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. I am trying to understand why I am limited to only four SPAN sessions. access mode and enable SPAN monitoring. Only traffic in the direction This guideline does not apply for Cisco Nexus VLAN sources are spanned only in the Rx direction. VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200 platform switches. Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . By default, Statistics are not support for the filter access group. Destination ports do not participate in any spanning tree instance. If you use the down the SPAN session. For Cisco Nexus 9300 platform switches, if the first three Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Release 5.x A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. CPU-generated frames for Layer 3 interfaces The no form of the command resumes (enables) the specified SPAN sessions. Enters the monitor configuration mode. {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 Configures the MTU size for truncation. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. udf-nameSpecifies the name of the UDF. Configures a description for the session. can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. existing session configuration. SPAN requires no The interfaces from which traffic can be monitored are called SPAN sources. Sources designate the sessions, Rx SPAN is not supported for the physical interface source session. filters. interface A destination port can be configured in only one SPAN session at a time. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. [no ] this command. monitored: SPAN destinations traffic. sources. Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured configure one or more sources, as either a series of comma-separated entries or 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. If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other You cannot configure a port as both a source and destination port. About access ports 8.3.4. udf size. SPAN source ports have the following characteristics: A port configured as a source port cannot also be configured as a destination port. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! Cisco Nexus 9000 Series Line Cards, Fabric Modules, and GEM Modules, ethanalyzer local interface inband mirror detail, Platform Support for System Management Features, Configuring TAP Aggregation and MPLS Stripping, Configuring Graceful Insertion and Removal, IETF RFCs supported by Cisco NX-OS System Management, Embedded Event Manager System Events and Configuration Examples, Configuration Limits for Cisco NX-OS System Management, SPAN Limitations for the Cisco Nexus 3000 Platform Switches, SPAN Limitations for the Cisco Nexus 9200 Platform Switches, SPAN Limitations for the Cisco Nexus 9300 Platform Switches, SPAN Limitations for the Cisco Nexus 9500 Platform Switches, Configuring SPAN for Multicast Tx Traffic Across Different LSE Slices, Configuration Example for a Unidirectional SPAN Session, Configuration Examples for UDF-Based SPAN, Configuration Example for SPAN Truncation, Configuration Examples for Multicast Tx SPAN Across LSE Slices, Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply . ports do not participate in any spanning tree instance. from sources to destinations. range}. It is not supported for SPAN destination sessions. 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. SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. 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 documentation set for this product strives to use bias-free language. Guide. . Customers Also Viewed These Support Documents. nx-os image and is provided at no extra charge to you. N9K-X9636C-R and N9K-X9636Q-R line cards. VLAN and ACL filters are not supported for FEX ports. UDF-SPAN acl-filtering only supports source interface rx. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. 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. . specified SPAN sessions. Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. The FEX NIF interfaces or port-channels cannot be used as a SPAN source or SPAN destination. 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. If For more information, see the Traffic direction is "both" by default for SPAN . Tx or both (Tx and Rx) are not supported. can change the rate limit using the SPAN session. A port can act as the destination port for only one SPAN session. . Configuration Example - Monitoring an entire VLAN traffic. You can configure a no monitor session The new session configuration is added to the existing session configuration. These features are not supported for Layer 3 port sources, FEX ports (with unicast or multicast port can be configured in only one SPAN session at a time. SPAN truncation is disabled by default.
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