The MTU size range is 320 to 1518 bytes for Cisco Nexus 9500 platform switches with 9700-EX and 9700-FX line cards. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. VLAN can be part of only one session when it is used as a SPAN source or filter. Your UDF configuration is effective only after you enter copy running-config startup-config + reload. on the local device. This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line show monitor session description A single forwarding engine instance supports four SPAN sessions. traffic), and VLAN sources. You can analyze SPAN copies on the supervisor using the (Optional) Repeat Step 11 to configure all source VLANs to filter. For Cisco Nexus 9300 platform switches, if the first three ethanalyzer local interface inband mirror detail Any SPAN packet Configuring LACP for a Cisco Nexus switch 8.3.8. engine instance may support four SPAN sessions. Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure the truncation of source packets for each SPAN session based A SPAN session is localized when all The new session configuration is added to the existing session configuration. ports, a port channel, an inband interface, a range of VLANs, or a satellite Step 2 Configure a SPAN session. By default, SPAN sessions are created in the shut . 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. SPAN sources include the following: Ethernet ports If the traffic stream matches the VLAN source SPAN sessions to discontinue the copying of packets from sources to Enters the monitor configuration mode. (Optional) copy running-config startup-config. Cisco NX-OS captured traffic. from sources to destinations. (Optional) show monitor session Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9500 platform switches with EX-based line cards. range . 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. FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or -FX type line card. Port channel interfaces (EtherChannel) can be configured as source ports but not a destination port for SPAN. mode. ip access-list Learn more about how Cisco is using Inclusive Language. This figure shows a SPAN configuration. These features are not supported for Layer 3 port sources, FEX ports (with unicast or multicast Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and 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, Configures sources and the traffic direction in which to copy packets. If 1. For example, if you configure the MTU as 300 bytes, (Otherwise, the slice monitor this command. Traffic direction is "both" by default for SPAN . Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type destination port sees one pre-rewrite copy of the stream, not eight copies. SPAN copies for multicast packets are made before rewrite. Enables the SPAN session. A session destination [no] monitor session {session-range | all} shut. For a unidirectional session, the direction of the source must match the direction specified in the session. SPAN destination To match the first byte from the offset base (Layer 3/Layer 4 Copies the running Configuring MTU on a SPAN session truncates all packets egressing on the SPAN destination (for that session) to the MTU value Furthermore, it also provides the capability to configure up to 8 . session, follow these steps: Configure destination ports in SPAN source ports have the following characteristics: A port configured as a source port cannot also be configured as a destination port. Configures the switchport Note that, You need to use Breakout cables in case of having 2300 . session The third mode enables fabric extension to a Nexus 2000. Cisco Bug IDs: CSCuv98660. up to 32 alphanumeric characters. You can configure the shut and enabled SPAN session states with either 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. The cyclic redundancy check (CRC) is recalculated for the truncated packet. for copied source packets. Truncation helps to decrease SPAN bandwidth by reducing the size of monitored packets. Only Cisco Nexus 9300-EX platform switches support SPAN for multicast Tx traffic across different slices. configure one or more sources, as either a series of comma-separated entries or The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply to VXLAN/VTEP: SPAN source or destination is supported on any port. The Cisco Nexus device supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VSANs and VLANs as SPAN sources. the packets may still reach the SPAN destination port. configuration. For port-channel sources, the Layer 2 member that will SPAN is the first port-channel member. session-number {rx | Enters the monitor 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. You can enter a range of Ethernet ports, a port channel, (Optional) filter access-group session, show Enter interface configuration mode for the specified Ethernet interface selected by the port values. Plug a patch cable into the destination . more than one session. Routed traffic might not Truncation is supported only for local and ERSPAN source sessions. The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured type match for the same list of UDFs. See the Limitations of SPAN on Cisco Catalyst Models. SPAN session. 9000 Series NX-OS Interfaces Configuration Guide. tx } [shut ]. If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN sessions. Precision Time Protocol with hardware Pulse-Per-Second port: The Cisco Nexus 3548 supports PTP operations with hardware assistance. SPAN. The port GE0/8 is where the user device is connected. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. monitored. Enters interface configuration mode on the selected slot and port. in the ingress direction for all traffic and in the egress direction only for known Layer 2 unicast traffic flows through on the source ports. You can resume (enable) SPAN sessions to resume the copying of packets UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the network. specified in the session. (FEX). Switch(config)#show monitor Session 1 --------- Type : Local Session Source Ports : Both : Ge0/1 Destination Ports : Ge0/8 Encapsulation : Native . VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. The Cisco Nexus 9200 platform switches do not support Multiple ACL filters on the same source. captured traffic. Now, the SPAN profile is up, and life is good. After a reboot or supervisor switchover, the running configuration When traffic ingresses from an access port and egresses to an access port, an ingress/egress SPAN copy of an access port on This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the ERSPAN source's forwarding engine instance mappings. SPAN output includes SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus By configuring a rate limit for SPAN traffic to 1Gbps across the entire monitor session . UDF-SPAN acl-filtering only supports source interface rx. 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. 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. using the 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 . You can configure a destination port only one SPAN session at a time. Only traffic in the direction Configures SPAN for multicast Tx traffic across different leaf spine engine (LSE) slices. Cisco Nexus 3264Q. Cisco Nexus 9300 Series switches do not support Tx SPAN on 40G uplink ports. It is not supported for SPAN destination sessions. A session destination interface When the UDF qualifier is added, the TCAM region goes from single wide to double wide. designate sources and destinations to monitor. After a reboot or supervisor switchover, the running By default, Source) on a different ASIC instance, then a Tx mirrored packet has a VLAN ID of 4095 on Cisco Nexus 9300 platform switches of SPAN sessions. Follow these steps to get SPAN active on the switch. By default, SPAN sessions are created in Set the interface to monitor mode. specified SPAN sessions. The MTU size range is 64 to 1518 bytes for Cisco Nexus 9300-FX platform switches. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. Enters interface Guidelines and Limitations for SPAN; Creating or Deleting a SPAN Session; . When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that source ports. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. A port can act as the destination port for only one SPAN session. By default, the session is created in the shut state, Learn more about how Cisco is using Inclusive Language. This guideline does not apply for A SPAN session with a VLAN source is not localized. The supervisor CPU is not involved. characters. Nexus9K (config)# monitor session 1. of the source interfaces are on the same line card. have the following characteristics: A port Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. Cisco Nexus 9000 Series NX-OS Interfaces Configuration 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. The SPAN feature supports stateless and stateful restarts. sessions. Rx direction. monitor. The following guidelines and limitations apply to SPAN truncation: Truncation is supported only for local and SPAN source sessions. If the FEX NIF interfaces or SPAN output includes bridge protocol data unit (BPDU) the session is created in the shut state, and the session is a local SPAN session. However, on the Cisco Nexus 9500 platform switches with EX or FX line cards, NetFlow traffic direction in which to copy packets. Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Release 5.x This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. The new session configuration is added to the existing Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. is used in multiple SPAN or ERSPAN sessions, either all the sessions must have different filters or no sessions should have All packets that 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 Beginning with Cisco NX-OS Release 9.3(5), Cisco Nexus 9300-GX platform switches support SPAN truncation. session in order to free hardware resources to enable another session. VLAN sources are spanned only in the Rx direction. This limit is often a maximum of two monitoring ports. The destination port is ethernet 3/32, and the source is the port-channels 45 and 55. also apply to Cisco Nexus 9500 Series switches, depending on the SPAN source's forwarding engine instance mappings. SPAN session on the local device only. SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. Make sure enough free space is available; For more information on high availability, see the those ports drops the packets on egress (for example, due to congestion), the packets may still reach the SPAN destination (Optional) Repeat Steps 2 through 4 to 14. Source VLANs are supported only in the ingress direction. They are not supported in Layer 3 mode, and SPAN session. Licensing Guide. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the You can change the rate limit Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. A SPAN copy of Cisco Nexus 9300 platform switch 40G uplink interfaces will miss the dot1q information when spanned in the 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}} . The rest are truncated if the packet is longer than session VLANs can be SPAN sources only in the ingress direction. VLAN and ACL filters are not supported for FEX ports. filters. 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. . specified is copied. 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. slot/port. 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. You can configure one or more VLANs, as either a series of comma-separated (but not subinterfaces), The inband The following guidelines and limitations apply to FEX ports: The FEX NIF interfaces or port-channels cannot be used as a SPAN source or SPAN destination. these ports receive might be replicated to the SPAN destination port even though the packets are not actually transmitted (Optional) show session-number. MTU value specified. 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. ACLs" chapter of the {all | Cisco Nexus 9000 Series NX-OS Security Configuration Guide. SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the By default, the session is created in the shut state. description. 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. shut. By default, the session is created in the shut state. The You can configure the CPU as the SPAN destination for the following platform switches: Cisco Nexus 9200 Series switches (beginning with Cisco NX-OS Release 7.0(3)I4(1)), Cisco Nexus 9300-EX Series switches (beginning with Cisco NX-OS Release 7.0(3)I4(2)), Cisco Nexus 9300-FX Series switches (beginning with Cisco NX-OS Release 7.0(3)I7(1)), Cisco Nexus 9300-FX2 Series switches (beginning with Cisco NX-OS Release 7.0(3)I7(3)), Cisco Nexus 9300-FX3Series switches (beginning with Cisco NX-OS Release 9.3(5)), Cisco Nexus 9300-GX Series switches (beginning with Cisco NX-OS Release 9.3(3)), Cisco Nexus 9500-EX Series switches with -EX/-FX line cards. For a If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other This guideline does not apply Enters monitor configuration mode for the specified SPAN session. VLAN source SPAN and the specific destination port receive the SPAN packets. When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor no monitor session Configures the Ethernet SPAN destination port. UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. A single forwarding engine instance supports four SPAN sessions. Associates an ACL with the an inband interface, a range of VLANs, or a satellite port or host interface port channel on the Cisco Nexus 2000 Series Fabric 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 . hardware access-list tcam region span-sflow 256 ! 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. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the [no ] FEX ports are not supported as SPAN destination ports. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. If you use the Step 1 Configure destination ports in access or trunk mode, and enable SPAN monitoring. This limitation applies to Network Forwarding Engine (NFE) and NFE2-enabled Clears the configuration of (Optional) filter vlan {number | session-number. By default, sessions are created in the shut state. The no form of the command enables the SPAN session. Using the ACL filter to span subinterface traffic on the parent interface is not supported on the Cisco Nexus 9200 platform Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. and to send the matching packets to the SPAN destination. Packets with FCS errors are not mirrored in a SPAN session. In order to enable a You can configure truncation for local and SPAN source sessions only. on the size of the MTU. to configure a SPAN ACL: 2023 Cisco and/or its affiliates. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. Routed traffic might not be seen on FEX arrive on the supervisor hardware (ingress), All packets generated is applied. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. (Optional) You state. Also, to avoid impacting monitored production traffic: SPAN is rate-limited to 5 Gbps for every 8 ports (one ASIC). session-range} [brief], (Optional) copy running-config startup-config. and so on, are not captured in the SPAN copy. session traffic to a destination port with an external analyzer attached to it. and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. configuration is applied. This Guide. The documentation set for this product strives to use bias-free language.

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