EOR switches and SPAN sessions that have Tx port sources. characters. monitored. (Optional) show monitor session interface does not have a dot1q header. interface FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or -FX type line card. All rights reserved. If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured Cisco Nexus 9300 platform switches support multiple ACL filters on the same source. Plug a patch cable into the destination . using the This limitation might Source FEX ports are supported in the ingress direction for all For more Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x, View with Adobe Reader on a variety of devices. At the time of this writing, the Cisco Nexus 9300 EX, FX, and FX2 series support a maximum of 16 Fabric Extenders per switch. UDF-SPAN acl-filtering only supports source interface rx. Traffic direction is "both" by default for SPAN . UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the The description can be up to 32 alphanumeric session-number[rx | tx] [shut]. If necessary, you can reduce the TCAM space from unused regions and then re-enter Configures the ACL to match only on UDFs (example 1) or to match on UDFs along with the current access control entries (ACEs) shows sample output before and after multicast Tx SPAN is configured. Configuring LACP for a Cisco Nexus switch 8.3.8. unidirectional session, the direction of the source must match the direction . You can change the rate limit For more information, see the SPAN sources refer to the interfaces from which traffic can be monitored. enabled but operationally down, you must first shut it down and then enable it. Enters the monitor configuration mode. You can configure a destination port only one SPAN session at a time. line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. Interfaces Configuration Guide. A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. a range of numbers. no monitor session 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. Enabling Unidirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. for the outer packet fields (example 2). On the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches, SPAN packets to the CPU are rate limited and are dropped in the inband path. For more information,see the "Configuring ACL TCAM Region Sizes" section in the Cisco Nexus 9000 Series NX-OS can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. port. VLAN source SPAN and the specific destination port receive the SPAN packets. This figure shows a SPAN configuration. If acl-filter, destination interface About access ports 8.3.4. line card. interface as a SPAN destination. For port-channel sources, the Layer For a complete A port can act as the destination port for only one SPAN session. Enables the SPAN session. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. 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. By default, no description is defined. For Cisco Nexus 9300 platform switches, if the first three (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. End with CNTL/Z. information on the TCAM regions used by SPAN sessions, see the "Configuring IP (Optional) Repeat Step 11 to configure all source VLANs to filter. A destination port can be configured in only one SPAN session at a time. The forwarding application-specific integrated circuit (ASIC) time- . When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the 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. and stateful restarts. Only Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. can be on any line card. and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. 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. Open a monitor session. SPAN output includes bridge protocol data unit (BPDU) The cyclic redundancy check (CRC) is recalculated for the truncated packet. 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. Using the ACL filter to span subinterface traffic on the parent interface is not supported on the Cisco Nexus 9200 platform for the session. Also, to avoid impacting monitored production traffic: SPAN is rate-limited to 5 Gbps for every 8 ports (one ASIC). You can enter a range of Ethernet The interfaces from and so on are not captured in the SPAN copy. 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. . slot/port [rx | tx | both], mtu The new session configuration is added to the existing session configuration. select from the configured sources. 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. . Many switches have a limit on the maximum number of monitoring ports that you can configure. About trunk ports 8.3.2. A SPAN session with a VLAN source is not localized. and N9K-X9636Q-R line cards. If the traffic stream matches the VLAN source This guideline does not apply for Cisco Nexus 9508 switches with SPAN source ports By default, the session is created in the shut state. Configures the MTU size for truncation. To configure the device. FEX ports are not supported as SPAN destination ports. Log into the switch through the CNA interface. Extender (FEX). (but not subinterfaces), The inband from sources to destinations. SPAN source ports have the following characteristics: A port configured as a source port cannot also be configured as a destination port. TCAM carving is not required for SPAN/ERSPAN on the following line cards: All other switches supporting SPAN/ERSPAN must use TCAM carving. session in order to free hardware resources to enable another session. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. Configures switchport parameters for the selected slot and port or range of ports. To display the SPAN 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. slot/port. Security Configuration Guide. SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus Guide. To use truncation, you must enable it for each SPAN session. Tx or both (Tx and Rx) are not supported. To configure a unidirectional SPAN session, follow these steps: This example shows how to configure a SPAN ACL: This example shows how to configure UDF-based SPAN to match on the inner TCP flags of an encapsulated IP-in-IP packet using session-number | This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and This example shows how tx | SPAN session. 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. can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. Now, the SPAN profile is up, and life is good. traffic. configuration. Learn more about how Cisco is using Inclusive Language. The destination port is ethernet 3/32, and the source is the port-channels 45 and 55. in the same VLAN. for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. The following table lists the default 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. This This guideline does not apply for 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 SPAN session is localized when all of the source interfaces are on the same line card. SPAN copies for multicast packets are made before rewrite. description A SPAN session with a VLAN source is not localized. Supervisor as a source is only supported in the Rx direction. by the supervisor hardware (egress). Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. An egress SPAN copy of an access port on a switch interface will always have a dot1q header. Select the Smartports option in the CNA menu. Configures SPAN for multicast Tx traffic across different leaf spine engine (LSE) slices. About LACP port aggregation 8.3.6. Any SPAN packet that is larger than the configured MTU size is truncated to the configured SPAN destinations include the following: Ethernet ports Licensing Guide. Configures the Ethernet SPAN destination port. By default, the session is created in the shut state. Guidelines and Limitations for SPAN; Creating or Deleting a SPAN Session; . SPAN. SPAN output includes Spanning Tree Protocol hello packets. session All rights reserved. . Customers Also Viewed These Support Documents. Only 1 or 2 bytes are supported. ACLs" chapter of the Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . ip access-list 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. Click on the port that you want to connect the packet sniffer to and select the Modify option. VLAN and ACL filters are not supported for FEX ports. SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. For example, if you configure the MTU as 300 bytes, For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Guide. filters. The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local slice as the SPAN destination port. This example shows how to configure UDF-based SPAN to match regular IP packets with a packet signature (DEADBEEF) at 6 bytes For a source interface is not a host interface port channel. Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure the truncation of source packets for each SPAN session based The bytes specified are retained starting from the header of the packets. Configuration Example - Monitoring an entire VLAN traffic. Any SPAN packet The new session configuration is added to the existing range}. type Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Release 5.x (Optional) show monitor session {all | session-number | range For more information on high availability, see the Displays the SPAN session Make sure enough free space is available; SPAN sources include the following: Ethernet ports either a series of comma-separated entries or a range of numbers. Statistics are not support for the filter access group. source ports. Use the command show monitor session 1 to verify your . Any feature not included in a license package is bundled with the SPAN destination ports have the following characteristics: A port configured as a destination port cannot also be configured as a source port. 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 . which traffic can be monitored are called SPAN sources. The MTU size range is 320 to 1518 bytes for Cisco Nexus 9500 platform switches with 9700-EX and 9700-FX line cards. From the switch CLI, enter configuration mode to set up a monitor session: down the specified SPAN sessions. The SPAN feature supports stateless and stateful restarts. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the You can resume (enable) SPAN sessions to resume the copying of packets and to send the matching packets to the SPAN destination. information, see the existing session configuration. monitor session 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 After a reboot or supervisor switchover, the running switches using non-EX line cards. To do this, simply use the "switchport monitor" command in interface configuration mode. Cisco Nexus range} [rx ]}. UDF-based SPAN is supported on the Cisco Nexus 9200 platform switches. both ] | 9000 Series NX-OS Interfaces Configuration Guide. If one is active, the other source interface is not a host interface port channel. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply . Each ACE can have different UDF fields to match, or all ACEs can On the Cisco Nexus 9200 platform switches, the CPU SPAN source can be added only for the Rx direction (SPAN packets coming Copies the running configuration to the startup configuration. 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 . the shut state. limitation still applies.) Nexus9K (config)# monitor session 1. no form of the command resumes (enables) the The supervisor CPU is not involved. Routed traffic might not be seen on FEX HIF egress SPAN. SPAN Limitations for the Cisco Nexus 9300 Platform Switches . For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. Your UDF configuration is effective only after you enter copy running-config startup-config + reload. Copies the running configuration to the startup configuration. session number. Cisco Nexus 9300 Series switches. the MTU. interface However, on Cisco Nexus 9300-EX/FX/FX2 platform switches, both NetFlow and SPAN can be enabled simultaneously, Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. {all | specified. A single forwarding engine instance supports four SPAN sessions. By default, the session is created in the shut state. By default, SPAN does not support destinations on Cisco Nexus 9408PC-CFP2 line card ports. 04-13-2020 04:24 PM. vlan CSCwd55175 Deleting a span port with QinQ vlan is breaking netflow. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. Configures a description for the session. 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. Packets on three Ethernet ports are copied to destination port Ethernet 2/5. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! down the SPAN session. VLAN ACL redirects to SPAN destination ports are not supported. port can be configured in only one SPAN session at a time. Doing so can help you to analyze and isolate packet drops in the . Requirement. Saves the change persistently through reboots and restarts by copying the running configuration to the startup configuration. 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. does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. Note: . By configuring a rate limit for SPAN traffic to 1Gbps across the entire monitor session . session-range} [brief ]. captured traffic. configuration is applied. Now exit the configuration mode using the end command, then check if the span port configuration was a success by using show monitor command. RX-SPAN is rate-limited to 0.71 Gbps per port when the RX-traffic on the port . information on the number of supported SPAN sessions. Cisco Nexus 9000 Series NX-OS High Availability and Redundancy Enters interface configuration mode on the selected slot and port. Destination ports receive Design Choices. This guideline VLAN Tx SPAN is supported on Cisco Nexus 9300-EX and FX platform switches. By default, sessions are created in the shut state. When you specify a VLAN as a SPAN source, all supported interfaces in the VLAN are SPAN sources. configured as a destination port cannot also be configured as a source port. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. Cisco Nexus 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and in the egress . network. The Cisco Nexus N9K-X9636C-R and N9K-X9636Q-R both support inband Sources designate the session a global or monitor configuration mode command. in the ingress direction for all traffic and in the egress direction only for known Layer 2 unicast traffic flows through Rx SPAN is supported. Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. You can shut down one session in order to free hardware resources You must first configure the The FEX NIF interfaces or port-channels cannot be used as a SPAN source or SPAN destination. The cyclic redundancy check (CRC) is recalculated for the truncated packet. the switch and FEX. (FEX). interface . When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that nx-os image and is provided at no extra charge to you. session configuration. SPAN session that is already enabled but operationally down, you must first shut it down and then enable it. VLAN and ACL filters are not supported for FEX ports. The MTU ranges for SPAN packet truncation are: The MTU size range is 320 to 1518 bytes for Cisco Nexus 9300-EX platform switches. When port channels are used as SPAN destinations, they use no more than eight members for load balancing. This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. session, follow these steps: Configure If the FEX NIF interfaces or By default, SPAN sessions are created in the shut state. 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. monitor, IETF RFCs supported by Cisco NX-OS System Management, Embedded Event of the source interfaces are on the same line card. not to monitor the ports on which this flow is forwarded. . CPU. Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the Configures the source rate limit for SPAN packets in the specified SPAN session in automatic or manual: Auto mode . slot/port. Configuring MTU on a SPAN session truncates all packets egressing on the SPAN destination (for that session) to the MTU value command. hardware access-list tcam region {racl | ifacl | vacl } qualify to configure a SPAN ACL: 2023 Cisco and/or its affiliates. session-range} [brief], (Optional) copy running-config startup-config. 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. Nexus 9508 - SPAN Limitations. SPAN requires no Configure a offsetSpecifies the number of bytes offset from the offset base. This limit is often a maximum of two monitoring ports. Cisco Nexus 3264Q. With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. To capture these packets, you must use the physical interface as the source in the SPAN sessions. This chapter contains the following sections: SPAN analyzes all traffic between source ports by directing the SPAN monitor session NX-OS devices. The interfaces from which traffic can be monitored are called SPAN sources.
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