You can analyze SPAN copies on the supervisor using the 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. Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . Statistics are not support for the filter access group. 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. By default, the session is created in the shut state, By default, Therefore, the TTL, VLAN ID, any remarking due to an egress policy, Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. 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 . all SPAN sources. size. The Displays the SPAN 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. Configures a destination for copied source packets. This figure shows a SPAN configuration. For Cisco Nexus 9300 platform switches, if the first three to not monitor the ports on which this flow is forwarded. Displays the status (Optional) filter access-group monitor. 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 refer to the interfaces that monitor source ports. udf . type down the specified SPAN sessions. SPAN is not supported for management ports. shut. side prior to the ACL enforcement (ACL dropping traffic). To match the first byte from the offset base (Layer 3/Layer 4 The destination port is ethernet 3/32, and the source is the port-channels 45 and 55. UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the I am trying to understand why I am limited to only four SPAN sessions. Nexus 9508 - SPAN Limitations. Only You can configure a destination port only one SPAN session at a time. The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. source interface is not a host interface port channel. on the source ports. SPAN. 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 . By default, sessions are created in the shut ports do not participate in any spanning tree instance. SPAN session. hardware access-list tcam region span-sflow 256 ! Configuration Example - Monitoring an entire VLAN traffic. The supervisor CPU is not involved. SPAN destinations refer to the interfaces that monitor source ports. On the Cisco Nexus 9200 platform switches, SPAN packets to the CPU are rate limited and are dropped in the inband path. SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus The bytes specified are retained starting from the header of the packets. and to send the matching packets to the SPAN destination. VLAN ACL redirects to SPAN destination ports are not supported. 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 For more information,see the "Configuring ACL TCAM Region Sizes" section in the Cisco Nexus 9000 Series NX-OS sessions, Rx SPAN is not supported for the physical interface source session. on the size of the MTU. mode. In addition, if for any reason one or more of UDF-SPAN acl-filtering only supports source interface rx. Set the interface to monitor mode. See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. You must configure Log into the switch through the CNA interface. SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. monitor If the traffic stream matches the VLAN source Associates an ACL with the This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. This limitation applies to the Cisco Nexus 97160YC-EX line card. Extender (FEX). Destination ports receive session-number. of SPAN sessions. For more information, see the . Routed traffic might not be seen on FEX HIF egress SPAN. Truncation helps to decrease SPAN bandwidth by reducing the size of monitored packets. 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. However, on the Cisco Nexus 9500 platform switches with EX or FX line cards, NetFlow FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type nx-os image and is provided at no extra charge to you. 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. description Clears the configuration of the specified SPAN session. 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. Enters . traffic to monitor and whether to copy ingress, egress, or both directions of all } . Shuts down the SPAN session. You can specify the traffic direction to copy as ingress (rx), egress (tx), or both. slot/port. Only traffic in the direction session, follow these steps: Configure The line "state : down (Dst in wrong mode)" means that the port profile is configured, but the destination interface hasn't been set up as a monitoring port. SPAN destination 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. For information on the A SPAN session is localized when all By default, SPAN sessions are created in and SPAN can both be enabled simultaneously, providing a viable alternative to using sFlow and SPAN. 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. SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. You can configure a SPAN session on the local device only. By default, the session is created in the shut state. interface UDF-based SPAN is supported on the Cisco Nexus 9200 platform switches. VLAN Tx SPAN is supported on the Cisco Nexus 9200 platform switches. FNF limitations. 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. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. interface About access ports 8.3.4. You can configure one or more sources, as either a series of comma-separated entries or a range of numbers. range} [rx ]}. About trunk ports 8.3.2. these ports receive might be replicated to the SPAN destination port even though the packets are not actually transmitted 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. providing a viable alternative to using sFlow and SPAN. line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. CPU-generated frames for Layer 3 interfaces enabled but operationally down, you must first shut it down and then enable it. After a reboot or supervisor switchover, the running configuration (Optional) Repeat Step 9 to configure all SPAN sources. IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. Configures sources and the traffic direction in which to copy packets. configuration to the startup configuration. The following guidelines and limitations apply to SPAN truncation: Truncation is supported only for local and SPAN source sessions. and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender Configuring MTU on a SPAN session truncates all packets egressing on the SPAN destination (for that session) to the MTU value Doing so can help you to analyze and isolate packet drops in the This limitation destination interface You must first configure the {number | Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure SPAN for multicast Tx traffic across different leaf spine 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. A mirror or SPAN (switch port analyzer) port can be a very useful resource if used in the correct way. (Otherwise, the slice c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. session-number[rx | tx] [shut]. limitation still applies.) Security Configuration Guide. to enable another session. Destination session in order to free hardware resources to enable another session. information, see the From the switch CLI, enter configuration mode to set up a monitor session: qualifier-name. (Optional) Routed traffic might not The bytes specified are retained starting from the header of the packets. SPAN sources refer to the interfaces from which traffic can be monitored. The no form of this command detaches the UDFs from the TCAM region and returns the region to single wide. It is not supported for SPAN destination sessions. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. in the ingress direction for all traffic and in the egress direction only for known Layer 2 unicast traffic flows through . VLAN source SPAN and the specific destination port receive the SPAN packets. show monitor session in either access or trunk mode, Port channels in You can change the size of the ACL ternary content addressable memory (TCAM) regions in the hardware. Customers Also Viewed These Support Documents. interface. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. configuration mode on the selected slot and port. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. 3.10.3 . This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R Same source cannot be configured in multiple span sessions when VLAN filter is configured. On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding -You cannot configure multiple flow monitors of same type (ipv4, ipv6 or datalink) on the same interface for same direction. 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. can be on any line card. can change the rate limit using the If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN to copy ingress (Rx), egress (Tx), or both directions of traffic. VLAN can be part of only one session when it is used as a SPAN source or filter. If This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco You can shut down one Nexus 9508 platform switches with 9636C-R and 9636Q-R line cards. Cisco Bug IDs: CSCuv98660. All rights reserved. Rx is from the perspective of the ASIC (traffic egresses from the supervisor over the inband and is received by the ASIC/SPAN).
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