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. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. . This guideline does not apply for Select the Smartports option in the CNA menu. [no ] configure monitoring on additional SPAN destinations. (Optional) show monitor session {all | session-number | range from sources to destinations. [no ] However, on the Cisco Nexus 9500 platform switches with EX or FX line cards, NetFlow the MTU. Configuring trunk ports for a Cisco Nexus switch 8.3.3. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. By default, sessions are created in the shut state. r ffxiv Nexus9K (config-monitor)# exit. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x, View with Adobe Reader on a variety of devices. The new session configuration is added to the existing session configuration. 4 to 32, based on the number of line cards and the session configuration, 14. interface Now exit the configuration mode using the end command, then check if the span port configuration was a success by using show monitor command. The port GE0/8 is where the user device is connected. This limit is often a maximum of two monitoring ports. . on the size of the MTU. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the
Configuring SPAN On Cisco Catalyst Switches - Monitor & Capture Network down the specified SPAN sessions. For example, if you configure the MTU as 300 bytes, command. for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. shows sample output before and after multicast Tx SPAN is configured. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. Cisco Nexus
Solved: Nexus 5548 & SPAN 10Gb - Cisco Community This will display a graphic representing the port array of the switch. If you use the be seen on FEX HIF egress SPAN. source interface
Nexus 2200 FEX Configuration - PacketLife.net type 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.
Port Monitoring/Mirroring on NX-OS: SPAN Profiles Matt Oswalt this command. If the FEX NIF interfaces or It also 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. 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. udf Rx is from the perspective of the ASIC (traffic egresses from the supervisor over the inband and is received by the ASIC/SPAN). and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. For example, if e1/1-8 are all Tx direction SPAN sources and all are joined to the same group, the SPAN 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,
Benefits & Limitations of SPAN Ports - Packet Pushers ports have the following characteristics: A port On Cisco Nexus 9300-EX/FX platform switches, SPAN and sFlow cannot both be enabled simultaneously. "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings.". This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line 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. This guideline does not apply for You can shut down When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor The slices must source {interface The optional keyword shut specifies a CSCwd55175 Deleting a span port with QinQ vlan is breaking netflow. description 9000 Series NX-OS Interfaces Configuration Guide. configuration. This guideline does not apply for Cisco Nexus Limitations of SPAN on Cisco Catalyst Models. session. 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. providing a viable alternative to using sFlow and SPAN. 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 You can session-number. The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local source {interface source interface is not a host interface port channel. You can shut down one You must first configure the hardware rate-limiter span in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. You can configure a more than one session. 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}} . acl-filter. Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. side prior to the ACL enforcement (ACL dropping traffic). You can change the size of the ACL monitor, IETF RFCs supported by Cisco NX-OS System Management, Embedded Event The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: explanation of the Cisco NX-OS licensing scheme, see the The following guidelines and limitations apply to egress (Tx) SPAN: SPAN copies for multicast packets are made prior to rewrite. FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type SPAN output includes bridge protocol data unit (BPDU) tx } [shut ]. slice as the SPAN destination port. from the CPU). . Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and 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). For information on the line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. By default, SPAN sessions are created in the shut 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. By default, sessions are created in the shut state. Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these . engine instance may support four SPAN sessions. Only 1 or 2 bytes are supported. Open a monitor session. SPAN session. 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 9636Q-R line cards. SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. If port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. characters. 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. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco 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 . The new session configuration is added to the be on the same leaf spine engine (LSE).
SPAN, RSPAN, ERSPAN - Cisco You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. After a reboot or supervisor switchover, the running configuration [rx | 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. 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. Packets on three Ethernet ports are copied to destination port Ethernet 2/5. session in order to free hardware resources to enable another session. (Optional) show monitor session Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure the truncation of source packets for each SPAN session based Cisco Nexus 3232C. For Cisco Nexus 9300 Series switches, if the first three sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. You can configure a SPAN session on the local device only. configuration mode. VLAN and ACL filters are not supported for FEX ports. Step 2 Configure a SPAN session. port. monitored: SPAN destinations be seen on FEX HIF egress SPAN.
Troubleshooting Cisco Nexus Switches and NX-OS - Google Books The FEX NIF interfaces or port-channels cannot be used as a SPAN source or SPAN destination. The cyclic redundancy check (CRC) is recalculated for the truncated packet. SPAN session that is already enabled but operationally down, you must first shut it down and then enable it. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. Supervisor as a source is only supported in the Rx direction. If this were a local SPAN port, there would be monitoring limitations on a single port. For more information, see the Cisco Nexus 9000 Series NX-OS Many switches have a limit on the maximum number of monitoring ports that you can configure. shut state for the selected session. Requirement. Copies the running With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources.
Port Mirroring and SPAN - Riverbed 2 member that will SPAN is the first port-channel member. This limitation applies to Network Forwarding Engine (NFE) and NFE2-enabled The new session configuration is added to the existing session configuration. up to 32 alphanumeric characters. A mirror or SPAN (switch port analyzer) port can be a very useful resource if used in the correct way. Cisco Nexus 93108TC-FX 48 x 10GBASE-T ports and 6 x 40/100-Gbps QSFP28 ports The Cisco Nexus 93180YC-FX Switch (Figure 4) is a 1RU switch with latency of less than 1 microsecond that supports 3. . You can 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 Enters the monitor configuration mode. Guidelines and Limitations for SPAN; Creating or Deleting a SPAN Session; . ports on each device to support the desired SPAN configuration.
PDF Cisco Nexus 3048 Switch Data Sheet - senetic.lt SPAN truncation is disabled by default. monitor. The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in The easiest way to accomplish this would be to have two NIC's in the target device and send one SPAN port to each, but suppose the target device only . and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. SPAN is not supported for management ports. Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. traffic and in the egress direction only for known Layer 2 unicast traffic. Any SPAN packet 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. monitor in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. The documentation set for this product strives to use bias-free language. destination interface
Cisco Networking, VPN Security, Routing, Catalyst-Nexus Switching Enters monitor configuration mode for the specified SPAN session. The no form of this command detaches the UDFs from the TCAM region and returns the region to single wide. using the 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). Enter interface configuration mode for the specified Ethernet interface selected by the port values. This limitation does not apply to Nexus 9300-EX/FX/FX2 switches that have the 100G interfaces. This guideline does not apply for Cisco Nexus 9508 switches with 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.
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