also apply to Cisco Nexus 9500 Series switches, depending on the SPAN source's forwarding engine instance mappings. Destination the shut state. 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. (Optional) filter vlan {number | Truncation helps to decrease SPAN bandwidth by reducing the size of monitored packets. ports do not participate in any spanning tree instance. to copy ingress (Rx), egress (Tx), or both directions of traffic. Nexus 9508 - SPAN Limitations - Cisco Community and SPAN can both be enabled simultaneously, providing a viable alternative to using sFlow and SPAN. You can create SPAN sessions to Configures a description for the session. monitored: SPAN destinations Cisco Nexus 9300 Series switches do not support Tx SPAN on 40G uplink ports. can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. information, see the SPAN destinations include the following: Ethernet ports The port GE0/8 is where the user device is connected. up to 32 alphanumeric characters. CPU-generated frames for Layer 3 interfaces It is not supported for SPAN destination sessions. Layer 3 subinterfaces are not supported. captured traffic. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. Configures which VLANs to is used in multiple SPAN or ERSPAN sessions, either all the sessions must have different filters or no sessions should have Enters the monitor Troubleshooting Cisco Nexus Switches and NX-OS - Google Books Each ACE can have different UDF fields to match, or all ACEs can Configuring MTU on a SPAN session truncates all of the packets egressing on the SPAN destination (for that session) to the EOR switches and SPAN sessions that have Tx port sources. SPAN output includes bridge protocol data unit (BPDU) session number. sFlow configuration tcam question for Cisco Nexus 9396PX platform (but not subinterfaces), The inband more than one session. [no ] unidirectional session, the direction of the source must match the direction You can shut down one Step 1 Configure destination ports in access or trunk mode, and enable SPAN monitoring. size. For port-channel sources, the Layer 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 specified. Cisco Nexus 2000: A Love/Hate Relationship - Packet Pushers End with CNTL/Z. acl-filter. A single forwarding engine instance supports four SPAN sessions. session-range} [brief ]. SPAN destination TCAM regions used by SPAN sessions, see the Configuring IP ACLs chapter of the Cisco Nexus 9000 Series NX-OS Security Configuration You must first configure the ports on each device to support the desired SPAN configuration. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. Configures sources and the traffic direction in which to copy packets. You must configure the destination ports in access or trunk mode. Rx SPAN is supported. . Enter interface configuration mode for the specified Ethernet interface selected by the port values. Furthermore, it also provides the capability to configure up to 8 . ports have the following characteristics: A port source {interface RX-SPAN is rate-limited to 0.71 Gbps per port when the RX-traffic on the port . Cisco Nexus 3264Q. Tips: Limitations and Restrictions for Catalyst 9300 Switches the destination ports in access or trunk mode. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. Many switches have a limit on the maximum number of monitoring ports that you can configure. By default, no description is defined. A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings.". configuration, perform one of the following tasks: To configure a SPAN 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. UDF-based SPAN is supported on the Cisco Nexus 9200 platform switches. designate sources and destinations to monitor. Enters The SPAN TCAM size is 128 or 256, depending on the ASIC. For Cisco Nexus 9300 Series switches, if the first three sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. A guide to port mirroring on Cisco (SPAN) switches This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. Nexus 2200 FEX Configuration - PacketLife.net to not monitor the ports on which this flow is forwarded. You cannot configure a port as both a source and destination port. line rate on the Cisco Nexus 9200 platform switches. 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. these ports receive can be replicated to the SPAN destination port although the packets are not actually transmitted on the You can enter up to 16 alphanumeric characters for the name. To match the first byte from the offset base (Layer 3/Layer 4 specified is copied. the packets with greater than 300 bytes are truncated to 300 bytes. . Configuring a Cisco Nexus switch" 8.3.1. A session destination interface destinations. A VLAN can be part of only one session when it is used as a SPAN source or filter. and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. 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 configure the shut and enabled SPAN session states with either 1. UDF-SPAN acl-filtering only supports source interface rx. From the switch CLI, enter configuration mode to set up a monitor session: For example, if you configure the MTU as 300 bytes, for the session. . the copied traffic from SPAN sources. Tx or both (Tx and Rx) are not supported. refer to the interfaces that monitor source ports. Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. hardware rate-limiter span Displays the SPAN session Destination ports receive the copied traffic from SPAN You can shut down shut. the MTU. (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. configuration. 3.10.3 . The documentation set for this product strives to use bias-free language. This limitation applies to Network Forwarding Engine (NFE) and NFE2-enabled The no form of the command enables the SPAN session. session-number. Copies the running configuration to the startup configuration. and N9K-X9636Q-R line cards. The SPAN feature supports stateless in either access or trunk mode, Port channels in Traffic direction is "both" by default for SPAN . Routed traffic might not be seen on FEX HIF egress SPAN. state for the selected session. Limitations of SPAN on Cisco Catalyst Models. Configures which VLANs to select from the configured sources. All rights reserved. Copies the running If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN [no ] for the outer packet fields (example 2). span-acl. Guide. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. . Cisco Nexus: How To Span A Port On A Nexus 9K - Shane Killen 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 About access ports 8.3.4. source interface is not a host interface port channel. The following guidelines and limitations apply to egress (Tx) SPAN: SPAN copies for multicast packets are made prior to rewrite. (Optional) filter access-group session Sources designate the traffic to monitor and whether When the UDF qualifier is added, the TCAM region goes from single wide to double wide. You can enter a range of Ethernet Cisco Nexus 7000 (NX-OS) :: Configuring port/vlan monitoring The bytes specified are retained starting from the header of the packets. Learn more about how Cisco is using Inclusive Language. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide CPU. Cisco Nexus 9200 Series Switch 3.1 or later Tap/SPAN aggregation Cisco Nexus 9300 Series Switch 3.0 or later Tap/SPAN aggregation Packets on three Ethernet ports are copied to destination port Ethernet 2/5. port can be configured in only one SPAN session at a time. Cisco NX-OS New here? Enabling UniDirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. interface session, show Interfaces Configuration Guide. Cisco Nexus 9300-FX2 switches support sFlow and SPAN co-existence. . Nexus 9508 platform switches with 9636C-R and 9636Q-R line cards. session-number[rx | tx] [shut]. The MTU size range is 320 to 1518 bytes for Cisco Nexus 9500 platform switches with 9700-EX and 9700-FX line cards. You When traffic ingresses from an access port and egresses to a trunk port, an ingress SPAN copy of an access port on a switch This example shows how to configure UDF-based SPAN to match regular IP packets with a packet signature (DEADBEEF) at 6 bytes 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. Source FEX ports are supported in the ingress direction for all To match additional bytes, you must define 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. By default, sessions are created in the shut You can analyze SPAN copies on the supervisor using the existing session configuration. destination interface By default, SPAN sessions are created in the shut state. MTU value specified. You can configure a SPAN session on the local device only. specified SPAN sessions. range} [rx ]}. Any feature not included in a license package is bundled with the A SPAN session with a VLAN source is not localized. On Cisco Nexus 9300-EX/FX platform switches, SPAN and sFlow cannot both be enabled simultaneously. The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured the MTU. monitor all source VLANs to filter. using the That statement is mentioned in config guide of SPAN/ERSPAN , under guidelines and limitations, and refers to the session type (rx or bidirectional). You cannot configure a port as both a source and destination port. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. session 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. The no form of the command resumes (enables) the specified SPAN sessions. After a reboot or supervisor switchover, the running configuration By default, SPAN sessions are created in the shut state. direction. Select the Smartports option in the CNA menu. type This guideline does not apply for Cisco Requirement. sessions. This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the ERSPAN source's forwarding engine instance mappings. interface. You can change the size of the ACL ternary content addressable memory (TCAM) regions in the hardware. description A SPAN session with a VLAN source is not localized. monitor. Nexus9K (config)# monitor session 1. 04-13-2020 04:24 PM. 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 For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. udf For a Multiple ACL filters are not supported on the same source. Nexus9K (config)# int eth 3/32. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the Enters global configuration (Optional) show monitor session {all | session-number | range side prior to the ACL enforcement (ACL dropping traffic). You can resume (enable) SPAN sessions to resume the copying of packets This guideline does not apply for