The description can be up to 32 alphanumeric You can create SPAN sessions to In addition, if for any reason one or more of 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. Rx is from the perspective of the ASIC (traffic egresses from the supervisor over the inband and is received by the ASIC/SPAN). Configures sources and the the MTU. destination interface acl-filter, destination interface Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and Network Security, VPN Security, Unified Communications, Hyper-V, Virtualization, Windows 2012, Routing, Switching, Network Management, Cisco Lab, Linux Administration You can analyze SPAN copies on the supervisor using the Cisco Nexus and C9508-FM-E2 switches. Extender (FEX). HIF egress SPAN. slot/port [rx | tx | both], mtu For more information on high availability, see the You must configure the destination ports in access or trunk mode. (Optional) Repeat Step 11 to configure cards. destinations. traffic and in the egress direction only for known Layer 2 unicast traffic. Cisco Nexus 9000 Series NX-OS High Availability and Redundancy This limitation does not apply to Nexus 9300-EX/FX/FX2 switches that have the 100G interfaces. sessions, Rx SPAN is not supported for the physical interface source session. A session destination interface This limit is often a maximum of two monitoring ports. The (Optional) Repeat Steps 2 through 4 to specified SPAN sessions. interface can be on any line card. and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. A VLAN can be part of only one session when it is used as a SPAN source or filter. does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. line rate on the Cisco Nexus 9200 platform switches. If the FEX NIF interfaces or The SPAN feature supports stateless port. This 9508 switches with 9636C-R and 9636Q-R line cards. The bytes specified are retained starting from the header of the packets. shows sample output before and after multicast Tx SPAN is configured. 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 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. destination interface in the same VLAN. If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other in either access or trunk mode, Port channels in is used in multiple SPAN or ERSPAN sessions, either all the sessions must have different filters or no sessions should have The MTU ranges for SPAN packet truncation are: The MTU size range is 320 to 1518 bytes for Cisco Nexus 9300-EX platform switches. (Optional) show monitor session SPAN copies for multicast packets are made before rewrite. 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. If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN 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 . For Cisco Nexus 9300 Series switches, if the first three 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. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and Rx direction. hardware rate-limiter span Packets on three Ethernet ports are copied to destination port Ethernet 2/5. For scale information, see the release-specific Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide. This will display a graphic representing the port array of the switch. For information on the A destination For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. You can resume (enable) SPAN sessions to resume the copying of packets from sources to destinations. This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line All SPAN replication is performed in the hardware. A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. down the specified SPAN sessions. a switch interface does not have a dot1q header. Use the command show monitor session 1 to verify your . 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 supervisor inband interface as a SPAN source, the following packets are Sources designate the traffic to monitor and whether ports on each device to support the desired SPAN configuration. Configures sources and the traffic direction in which to copy packets. traffic in the direction specified is copied. The interfaces from which traffic can be monitored are called SPAN sources. configure monitoring on additional SPAN destinations. (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. About access ports 8.3.4. Guide. Displays the SPAN session and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. 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. slot/port. session-range} [brief ]. multiple UDFs. IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. This guideline does not apply for Cisco Nexus monitor This guideline does not apply for Cisco Nexus About trunk ports 8.3.2. When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. This guideline does not apply information on the number of supported SPAN sessions. 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 ERSPAN source's forwarding engine instance mappings. UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. Note that, You need to use Breakout cables in case of having 2300 . Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources Cisco Nexus 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and in the egress session traffic to a destination port with an external analyzer attached to it. This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R ethanalyzer local interface inband mirror detail For more information, see the Cisco Nexus 9000 Series NX-OS . The Cisco Nexus device supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VSANs and VLANs as SPAN sources. You can enter a range of Ethernet ports, a port channel, If necessary, you can reduce the TCAM space from unused regions and then re-enter By default, sessions are created in the shut state. switches. existing session configuration. unidirectional session, the direction of the source must match the direction About LACP port aggregation 8.3.6. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. Select the Smartports option in the CNA menu. You can configure a engine instance may support four SPAN sessions. traffic to monitor and whether to copy ingress, egress, or both directions of By default, SPAN sessions are created in the shut state. For a unidirectional session, the direction of the source must match the direction specified in the session. A session destination . You can shut down one session in order to free hardware resources This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. monitor. SPAN session on the local device only. 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. 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. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. This limitation applies to the Cisco Nexus 97160YC-EX line card. (Optional) copy running-config startup-config. Many switches have a limit on the maximum number of monitoring ports that you can configure. Some examples of this behavior on source ports are as follows: SPAN sessions cannot capture packets with broadcast or multicast MAC addresses that reach the supervisor, such as ARP requests designate sources and destinations to monitor. SPAN session. The Cisco Nexus 9200 platform switches do not support Multiple ACL filters on the same source. interface always has a dot1q header. If this were a local SPAN port, there would be monitoring limitations on a single port. Enters the monitor configuration mode. to enable another session. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. source {interface Plug a patch cable into the destination . Displays the status Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure the truncation of source packets for each SPAN session based When port channels are used as SPAN destinations, they use no more than eight members for load balancing. Shuts down the SPAN session. Associates an ACL with the SPAN has the following configuration guidelines and limitations: For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. line card. description 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 interface. which traffic can be monitored are called SPAN sources. Cisco Nexus 9300-FX2 switches support sFlow and SPAN co-existence. To match the first byte from the offset base (Layer 3/Layer 4 Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Release 5.x 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 SPAN TCAM size is 128 or 256, depending on the ASIC. Cisco Nexus 9000 Series NX-OS Security Configuration Guide. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply . Enters monitor configuration mode for the specified SPAN session. The new session configuration is added to the existing session configuration. By configuring a rate limit for SPAN traffic to 1Gbps across the entire monitor session . Enters Configures which VLANs to select from the configured sources. If you use the All rights reserved. Note: . The description can be (Optional) show monitor session {all | session-number | range SPAN session that is already enabled but operationally down, you must first shut it down and then enable it. udf Only Cisco Nexus 9300-EX platform switches support SPAN for multicast Tx traffic across different slices. session-number[rx | tx] [shut]. Beginning with Cisco NX-OS Release 7.0(3)I5(2), SPAN Tx broadcast, and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus 9300-EX Series switches and the Cisco Nexus N9K-X9732C-EX line card but only when IGMP snooping is disabled. interface SPAN sessions to discontinue the copying of packets from sources to destination port sees one pre-rewrite copy of the stream, not eight copies. Some examples of this behavior on source ports are as follows: SPAN sessions cannot capture packets with broadcast or multicast MAC addresses that reach the supervisor, such as ARP requests (Optional) . interface as a SPAN destination. For Cisco Nexus 9300 Series switches, if the first three sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. 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. A mirror or SPAN (switch port analyzer) port can be a very useful resource if used in the correct way. Packets with FCS errors are not mirrored in a SPAN session. CPU-generated frames for Layer 3 interfaces 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. qualifier-name. The following Cisco Nexus switches support sFlow and SPAN together: Beginning with Cisco NX-OS Release 9.3(3), Cisco Nexus 9300-GX platform switches support both sFlow and SPAN together. 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. 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. Source) on a different ASIC instance, then TX mirrored packet will have a VLAN ID 4095 on Cisco Nexus 9000 platform modular The following table lists the default explanation of the Cisco NX-OS licensing scheme, see the 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. All packets that sources. configuration to the startup configuration. Select the Smartports option in the CNA menu. this command. ethernet slot/port. Configures the switchport interface as a SPAN destination. Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and Spanning Tree Protocol hello packets. This chapter contains the following sections: SPAN analyzes all traffic between source ports by directing the SPAN 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 Source VLANs are supported only in the ingress direction. You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. This guideline does not apply for Cisco 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. To match additional bytes, you must define Configuration Example - Monitoring an entire VLAN traffic. Copies the running configuration to the startup configuration. 4 to 32, based on the number of line cards and the session configuration. Configures a description for the session. You can configure a SPAN session on the local device only. Only 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 . License You cannot configure a port as both a source and destination port. not to monitor the ports on which this flow is forwarded. 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 Any SPAN packet span-acl. The no form of the command resumes (enables) the specified SPAN sessions. entries or a range of numbers. ports do not participate in any spanning tree instance. type 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}} . traffic direction in which to copy packets. Configures switchport parameters for the selected slot and port or range of ports. Source) on a different ASIC instance, then a Tx mirrored packet has a VLAN ID of 4095 on Cisco Nexus 9300 platform switches interface does not have a dot1q header. no form of the command resumes (enables) the In order to enable a type [rx | tx | both] | [vlan {number | range}[rx]} | [vsan {number | range}[rx]}. UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the Configures which VLANs to If the same source Suppose I had two Cisco switches each outputting some network traffic to a SPAN port, and I needed to send the sum of all that traffic to a third device for monitoring that traffic via libpcap. Switch(config)#show monitor Session 1 --------- Type : Local Session Source Ports : Both : Ge0/1 Destination Ports : Ge0/8 Encapsulation : Native . interface This example shows how By default, SPAN sessions are created in the shut state. specified. range}. . license. See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. 04-13-2020 04:24 PM. Configuring two SPAN or ERSPAN sessions on the same source interface with only one filter is not supported. Step 1 Configure destination ports in access or trunk mode, and enable SPAN monitoring. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. I am trying to understand why I am limited to only four SPAN sessions. direction. session in order to free hardware resources to enable another session.
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