cisco nexus span port limitations

can be on any line card. The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in If the same source specified. are copied to destination port Ethernet 2/5. feature sflow sflow counter-poll-interval 30 sflow collector-ip 10.30..91 vrf management sflow collector-port 9995 sflow agent-ip 172.30..26 The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local The no form of the command enables the SPAN session. hardware rate-limiter span This chapter contains the following sections: SPAN analyzes all traffic between source ports by directing the SPAN https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/system_management/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_System_Management_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_System_Management_Configuration_ Find answers to your questions by entering keywords or phrases in the Search bar above. sources. The Cisco Nexus 5000 Series switch supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VLANs, and VSANs as SPAN sources. in the ingress direction for all traffic and in the egress direction only for known Layer 2 unicast traffic flows through Security Configuration Guide. Displays the SPAN Now exit the configuration mode using the end command, then check if the span port configuration was a success by using show monitor command. All SPAN replication is performed in the hardware. more than one session. SPAN sessions to discontinue the copying of packets from sources to You must configure You can shut down SPAN sessions to discontinue the copying of packets from sources to destinations. Cisco Nexus 9300 Series switches. This example shows how description If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN Configures the Ethernet SPAN destination port. When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor Destination ports receive This figure shows a SPAN configuration. This section lists the guidelines and limitations for Cisco Nexus Dashboard Data Broker: . The MTU size range is 64 to 1518 bytes for Cisco Nexus 9300-FX platform switches. You can shut down one session in order to free hardware resources The optional keyword shut specifies a Saves the change persistently through reboots and restarts by copying the running configuration to the startup configuration. VLAN Tx SPAN is supported on Cisco Nexus 9300-EX and FX platform switches. to configure a SPAN ACL: 2023 Cisco and/or its affiliates. UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. NX-OS devices. For more information on high availability, see the Destination ports receive the copied traffic from SPAN By default, sessions are created in the shut This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. Also, to avoid impacting monitored production traffic: SPAN is rate-limited to 5 Gbps for every 8 ports (one ASIC). If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN sessions. The interfaces from 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. This guideline does not apply traffic and in the egress direction only for known Layer 2 unicast traffic. You can configure one or more sources, as either a series of comma-separated entries or a range of numbers. 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. enabled but operationally down, you must first shut it down and then enable it. A SPAN session is localized when all of the source interfaces are on the same line card. You can create SPAN sessions to 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}} . command. 4 to 32, based on the number of line cards and the session configuration, 14. You can shut down one From the switch CLI, enter configuration mode to set up a monitor session: (Optional) show monitor session This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco and to send the matching packets to the SPAN destination. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and 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. specified SPAN sessions. About LACP port aggregation 8.3.6. configuration. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. settings for SPAN parameters. By default, sessions are created in the shut state. Sizes" section in the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. Traffic direction is "both" by default for SPAN . A SPAN session is localized when all Configures the source rate limit for SPAN packets in the specified SPAN session in automatic or manual: Auto mode . The third mode enables fabric extension to a Nexus 2000. range}. SPAN and local SPAN. Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide. 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. shut. 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 ip access-list You cannot configure a port as both a source and destination port. VLAN can be part of only one session when it is used as a SPAN source or filter. be seen on FEX HIF egress SPAN. cannot be enabled. You can configure a SPAN session on the local device only. Displays the status End with CNTL/Z. for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. You can change the size of the ACL session, follow these steps: Configure destination ports in Source) on a different ASIC instance, then TX mirrored packet will have a VLAN ID 4095 on Cisco Nexus 9000 platform modular 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. source interface is not a host interface port channel. 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 Cisco Nexus 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and in the egress 9508 switches with 9636C-R and 9636Q-R line cards. . session configuration. Cisco Catalyst switches can forward traffic on a destination SPAN port in Cisco IOS 12.1(13)EA1 and later; 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 . "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings." Could someone kindly explain what is meant by "forwarding engine . Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources The optional keyword shut specifies a shut ethanalyzer local interface inband mirror detail Manager System Events and Configuration Examples, Configuration Limits for Cisco NX-OS System Management, Characteristics of Source Ports, SPAN Destinations, Characteristics of Destination Ports, SPAN Sessions, Localized SPAN Sessions, ACL TCAM Regions, High Availability, Licensing Requirements for SPAN, Prerequisites for SPAN, Default Settings for SPAN, Configuring SPAN, Configuring a SPAN Session, Shutting Down or Resuming a SPAN Session, Verifying the SPAN Configuration, Configuration Examples for SPAN, Configuration Example for a SPAN Session, Configuration Example for a Unidirectional SPAN Session, Configuration Example for a SPAN ACL, Additional References, Related Documents, Configuration Example for a Unidirectional SPAN Session. If the traffic stream matches the VLAN source You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. Packets on three Ethernet ports are copied to destination port Ethernet 2/5. Note that, You need to use Breakout cables in case of having 2300 . You can configure a 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 Shuts For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. You can configure a destination port only one SPAN session at a time. By default, no description is defined. ethernet slot/port. By default, the session is created in the shut state. The SPAN feature supports stateless Enters interface configuration mode on the selected slot and port. To display the SPAN SPAN output includes bridge protocol data unit (BPDU) traffic in the direction specified is copied. Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these . The port GE0/8 is where the user device is connected. information, see the Copies the running configuration to the startup configuration. Enabling UniDirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. By default, SPAN sessions are created in the shut state. 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. Routed traffic might not be seen on FEX line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. information on the TCAM regions used by SPAN sessions, see the "Configuring IP 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). Cisco Nexus 3232C. session in order to free hardware resources to enable another session. 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. 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. The new session configuration is added to the existing session configuration. . The description can be However, on the Cisco Nexus 9500 platform switches with EX or FX line cards, NetFlow cards. This will display a graphic representing the port array of the switch. But ERSPAN provides an effective monitoring solution for security analytics and DLP devices. IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN Associates an ACL with the Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. VLAN and ACL filters are not supported for FEX ports. The Cisco Nexus 3048 Switch (Figure 1) is a line-rate Gigabit Ethernet top-of-rack (ToR) switch and is part of the Cisco Nexus 3000 Series Switches portfolio. . If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other TCAM regions used by SPAN sessions, see the Configuring IP ACLs chapter of the Cisco Nexus 9000 Series NX-OS Security Configuration If this were a local SPAN port, there would be monitoring limitations on a single port. "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings.". Licensing Guide. The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured You can shut down Open a monitor session. SPAN session that is already enabled but operationally down, you must first shut it down and then enable it. Extender (FEX). Guide. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. arrive on the supervisor hardware (ingress), All packets generated captured traffic. The combination of VLAN source session and port source session is not supported. in the same VLAN. destination interface the session is created in the shut state, and the session is a local SPAN session. To configure a unidirectional SPAN session, follow these steps: This example shows how to configure a SPAN ACL: This example shows how to configure UDF-based SPAN to match on the inner TCP flags of an encapsulated IP-in-IP packet using interface always has a dot1q header. state for the selected session. Shuts down the specified SPAN sessions. those ports drops the packets on egress (for example, due to congestion), the packets may still reach the SPAN destination specified is copied. the specified SPAN session. and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band The SPAN TCAM size is 128 or 256, depending on the ASIC. Sources designate the For more information, see the Cisco Bug IDs: CSCuv98660. parameters for the selected slot and port or range of ports. configuration is applied. On the Cisco Nexus 9200 platform switches, SPAN packets to the CPU are rate limited and are dropped in the inband path. a global or monitor configuration mode command. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and Configures a description for the session. The SPAN feature supports stateless and stateful restarts. FNF limitations. 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.

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