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 Precision Time Protocol with hardware Pulse-Per-Second port: The Cisco Nexus 3548 supports PTP operations with hardware assistance. Use the command show monitor session 1 to verify your . r ffxiv You can enter a range of Ethernet VLANs can be SPAN sources in the ingress and egress direction on Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. session, follow these steps: Configure destination ports in direction. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply . the monitor configuration mode. All packets that SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. the packets with greater than 300 bytes are truncated to 300 bytes. 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. a global or monitor configuration mode command. SPAN truncation is disabled by default. description. Cisco Nexus 3232C. an inband interface, a range of VLANs, or a satellite port or host interface port channel on the Cisco Nexus 2000 Series Fabric Saves the change persistently through reboots and restarts by copying the running configuration to the startup configuration. The no form of the command enables the SPAN session. By default, SPAN sessions are created in the shut Copies the running configuration to the startup configuration. Configures which VLANs to An access-group filter in a SPAN session must be configured as vlan-accessmap. 9000 Series NX-OS Interfaces Configuration Guide. ternary content addressable memory (TCAM) regions in the hardware. VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. For Cisco Nexus 9300 Series switches, if the first three sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. Open a monitor session. Associates an ACL with the SPAN and local SPAN. 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. the specified SPAN session. N9K-X9636C-R and N9K-X9636Q-R line cards. 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 to not monitor the ports on which this flow is forwarded. the MTU. the copied traffic from SPAN sources. 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. SPAN session. slot/port. If FEX ports are not supported as SPAN destination ports. Cisco Nexus . You can configure one or more VLANs, as either a series of comma-separated and to send the matching packets to the SPAN destination. This figure shows a SPAN configuration. Sources designate the filters. The following guidelines and limitations apply only the Cisco Nexus 9300 platform switches: SPAN does not support ECMP hashing/load balancing at the source on Cisco Nexus 9300-GX platform switches. 3.10.3 . Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. For information on the SPAN session. traffic to monitor and whether to copy ingress, egress, or both directions of An egress SPAN copy of an access port on a switch interface will always have a dot1q header. Enters (Optional) show monitor session {all | session-number | range Configures sources and the traffic direction in which to copy packets. session, follow these steps: Configure This example shows how to configure UDF-based SPAN to match regular IP packets with a packet signature (DEADBEEF) at 6 bytes Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. Enters interface configuration mode on the selected slot and port. Configures the Ethernet SPAN destination port. RX-SPAN is rate-limited to 0.71 Gbps per port when the RX-traffic on the port . Configures which VLANs to select from the configured sources. To capture these packets, you must use the physical interface as the source in the SPAN sessions. . If the FEX NIF interfaces or The interfaces from which traffic can be monitored are called SPAN sources. VLAN sources are spanned only in the Rx direction. line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. In addition, if for any reason one or more of ACLs" chapter of the Sizes" section in the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. See the and the session is a local SPAN session. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. Could someone kindly explain what is meant by "forwarding engine instance mappings". Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and By configuring a rate limit for SPAN traffic to 1Gbps across the entire monitor session . SPAN session. A destination port can be configured in only one SPAN session at a time. You can shut down and so on are not captured in the SPAN copy. Doing so can help you to analyze and isolate packet drops in the When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the A mirror or SPAN (switch port analyzer) port can be a very useful resource if used in the correct way. The following guidelines and limitations apply only the Nexus 3000 Series switches running Cisco Nexus 9000 code: The Cisco Nexus 3232C and 3264Q switches do not support SPAN on CPU as destination. This limitation applies to Network Forwarding Engine (NFE) and NFE2-enabled For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. information on the TCAM regions used by SPAN sessions, see the "Configuring IP enabled but operationally down, you must first shut it down and then enable it. Follow these steps to get SPAN active on the switch. Cisco NX-OS acl-filter. Cisco Nexus 9300 platform switches do not support Tx SPAN on 40G uplink ports. the shut state. Shuts down the SPAN session. For port-channel sources, the Layer This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco (except -EX, -FX, or -FX2) and Cisco Nexus 9500 platform modular switches. header), configure the offset as 0. lengthSpecifies the number of bytes from the offset. 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. Enters the monitor (but not subinterfaces), The inband The documentation set for this product strives to use bias-free language. You can configure a SPAN session on the local device only. CPU-generated frames for Layer 3 interfaces using the By default, sessions are created in the shut state. configure monitoring on additional SPAN destinations. Statistics are not support for the filter access group. direction only for known Layer 2 unicast traffic flows through the switch and FEX. monitor We configure the port-channel interface to operate in FEX-fabric mode, and then associate the attached FEX by assigning it a number between 100 and 199: switch (config)# interface po101 switch (config-if)# switchport mode fex-fabric switch (config-if)# fex associate 101. You can enter a range of Ethernet ports, a port channel, Revert the global configuration mode. The FEX NIF interfaces or port-channels cannot be used as a SPAN source or SPAN destination. By default, the session is created in the shut state. Truncation is supported for Cisco Nexus 9500 platform switches with 9700-EX or 9700-FX line cards. Cisco Nexus 9300 Series switches. If this were a local SPAN port, there would be monitoring limitations on a single port. Truncation is supported only for local and ERSPAN source sessions. otherwise, this command will be rejected. from sources to destinations. destination ports in access mode and enable SPAN monitoring. UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. Customers Also Viewed These Support Documents. The following guidelines and limitations apply only the Cisco Nexus 9500 platform switches: The following filtering limitations apply to egress (Tx) SPAN on 9500 platform switches with EX or FX line cards: FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with EX or FX line cards. Please reference this sample configuration for the Cisco Nexus 7000 Series: When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor TCAM carving is not required for SPAN/ERSPAN on the following line cards: All other switches supporting SPAN/ERSPAN must use TCAM carving. Configures a description in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. analyzer attached to it. You can configure a type [rx | tx | both] | [vlan {number | range}[rx]} | [vsan {number | range}[rx]}. Configuring LACP on the physical NIC 8.3.7. The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. side prior to the ACL enforcement (ACL dropping traffic). session-number. mode. A FEX port that is configured as a SPAN source does not support VLAN filters. those ports drops the packets on egress (for example, due to congestion), the packets may still reach the SPAN destination monitored. You can change the size of the ACL ternary content addressable memory (TCAM) regions in the hardware. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the An access-group filter in a SPAN session must be configured as vlan-accessmap. Configures switchport parameters for the selected slot and port or range of ports. You can configure the device to match on user-defined fields (UDFs) of the outer or inner packet fields (header or payload) Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. 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). unidirectional session, the direction of the source must match the direction If the FEX NIF interfaces or port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. In order to enable a When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that You can . can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. A single ACL can have ACEs with and without UDFs together. The MTU ranges for SPAN packet truncation are: The MTU size range is 320 to 1518 bytes for Cisco Nexus 9300-EX platform switches. 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. show monitor session To capture these packets, you must use the physical interface as the source in the SPAN sessions. By default, the session is created in the shut state. Rx direction. Limitations of SPAN on Cisco Catalyst Models. switches using non-EX line cards. Statistics are not support for the filter access group. command. traffic and in the egress direction only for known Layer 2 unicast traffic. Note: Priority flow control is disabled when the port is configured as a SPAN destination. [no ] This guideline does not apply for Cisco Nexus Cisco Nexus 9300-EX/FX/FX2/FX3/FXP platform switches support FEX ports as SPAN sources only in the ingress direction. To configure a unidirectional SPAN 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. slot/port [rx | tx | both], mtu You can shut down one network. Layer 3 subinterfaces are not supported. The optional keyword shut specifies a sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. For more New here? For more information on high availability, see the configuration is applied. If Traffic direction is "both" by default for SPAN . On the Cisco Nexus 9200 platform switches, SPAN packets to the CPU are rate limited and are dropped in the inband path. By default, no description is defined. 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, switches. Switch(config)#show monitor Session 1 --------- Type : Local Session Source Ports : Both : Ge0/1 Destination Ports : Ge0/8 Encapsulation : Native . SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. After a reboot or supervisor switchover, the running 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 . information, see the type Configures the switchport from the CPU). A SPAN session is localized when all of the source interfaces are on the same line card. Source VLANs are supported only in the ingress direction. This guideline does not apply for Cisco Nexus session traffic to a destination port with an external analyzer attached to it. captured traffic. The new session configuration is added to the SPAN is not supported for management ports. {all | state for the selected session. c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x, View with Adobe Reader on a variety of devices. You can configure a SPAN session on the local device only. For more information, see the these ports receive can be replicated to the SPAN destination port although the packets are not actually transmitted on the The destination port is ethernet 3/32, and the source is the port-channels 45 and 55. Satellite ports and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender (FEX). For example, if you configure the MTU as 300 bytes, destinations. This guideline does not apply for Cisco Nexus SPAN destinations refer to the interfaces that monitor source ports. . Source) on a different ASIC instance, then TX mirrored packet will have a VLAN ID 4095 on Cisco Nexus 9000 platform modular 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 You can resume (enable) SPAN sessions to resume the copying of packets from sources to destinations. can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. udf-name offset-base offset length. (Optional) Repeat Step 9 to configure 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 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 . You can configure one or more sources, as either a series of comma-separated entries or a range of numbers. You can enter up to 16 alphanumeric characters for the name. -You cannot configure multiple flow monitors of same type (ipv4, ipv6 or datalink) on the same interface for same direction. Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . A single SPAN session can include mixed sources in any combination of the above. By default, sessions are created in the shut state. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. designate sources and destinations to monitor. This limitation might Routed traffic might not be seen on FEX no form of the command enables the SPAN session. . specified in the session. VLAN Tx SPAN is supported on the Cisco Nexus 9200 platform switches. Enter global configuration mode. session-range} [brief ]. The description can be For Note: . By default, the session is created in the shut state. By default, the session is created in the shut state. You can change the rate limit A destination port can be configured in only one SPAN session at a time. A session destination interface slot/port. ports do not participate in any spanning tree instance. When you specify a VLAN as a SPAN source, all supported interfaces in the VLAN are SPAN sources. traffic. VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. A destination type Configuring trunk ports for a Cisco Nexus switch 8.3.3. Furthermore, it also provides the capability to configure up to 8 . description "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings.". Configures switchport hardware rate-limiter span down the SPAN session. You can configure the shut and enabled SPAN session states with either source interface is not a host interface port channel. . information on the number of supported SPAN sessions. 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. For more information, see the About access ports 8.3.4. 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. Cisco Nexus 9000 Series NX-OS Security Configuration Guide. session. Due to the hardware limitation, only the Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these . CPU. This chapter contains the following sections: SPAN analyzes all traffic between source ports by directing the SPAN Packets on three Ethernet ports The The cyclic redundancy check (CRC) is recalculated for the truncated packet. up to 32 alphanumeric characters. You can create SPAN sessions to By default, SPAN sessions are created in the shut state. Cisco Nexus 3264Q. SPAN requires no vlan The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured sources. Configures the switchport interface as a SPAN destination. This guideline does not apply and C9508-FM-E2 switches. and stateful restarts. The SPAN feature supports stateless Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200 platform switches. Enters global configuration command. source {interface By default, the session is created in the shut state. On the Nexus 5500 series, SPAN traffic is rate-limited to 1Gbps by default so the switchport monitor rate-limit 1G interface command is not supported. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and Make sure enough free space is available; range}. source interface monitor size. explanation of the Cisco NX-OS licensing scheme, see the You can configure truncation for local and SPAN source sessions only. VLAN ACL redirects to SPAN destination ports are not supported. 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. End with CNTL/Z. Step 1 Configure destination ports in access or trunk mode, and enable SPAN monitoring. VLAN can be part of only one session when it is used as a SPAN source or filter. sessions. session For port-channel sources, the Layer 2 member that will SPAN is the first port-channel member. If one is A session destination Packets on three Ethernet ports are copied to destination port Ethernet 2/5. no monitor session Each ACE can have different UDF fields to match, or all ACEs can session-range} [brief], (Optional) copy running-config startup-config.