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 single forwarding engine instance supports four SPAN sessions. Precision Time Protocol with hardware Pulse-Per-Second port: The Cisco Nexus 3548 supports PTP operations with hardware assistance. SPAN has the following configuration guidelines and limitations: For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. Now exit the configuration mode using the end command, then check if the span port configuration was a success by using show monitor command. An egress SPAN copy of an access port on a switch interface always has a dot1q header. Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. Port Mirroring and SPAN - Riverbed cannot be enabled. destinations. To do so, enter sup-eth 0 for the interface type. All rights reserved. cisco - Can I connect multiple SPAN Ports to a hub to monitor both from in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. In addition, if for any reason one or more of no monitor session up to 32 alphanumeric characters. SPAN sources include the following: Ethernet ports The following guidelines and limitations apply to ingress (Rx) SPAN: A SPAN copy of Cisco Nexus 9300 Series switch 40G uplink interfaces will miss the dot1q information when spanned in the Rx Either way, here is the configuration for a monitor session on the Nexus 9K. Furthermore, it also provides the capability to configure up to 8 . Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor The no form of the command resumes (enables) the specified SPAN sessions. hardware access-list tcam region span-sflow 256 ! access mode and enable SPAN monitoring. To display the SPAN 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. By default, sessions are created in the shut state. Benefits & Limitations of SPAN Ports - Packet Pushers The documentation set for this product strives to use bias-free language. . If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN This figure shows a SPAN configuration. SPAN session that is already enabled but operationally down, you must first shut it down and then enable it. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. A SPAN session with a VLAN source is not localized. You can enter a range of Ethernet SPAN is not supported for management ports. parameters for the selected slot and port or range of ports. License TCAM carving is not required for SPAN/ERSPAN on the following line cards: All other switches supporting SPAN/ERSPAN must use TCAM carving. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band 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. Interfaces Configuration Guide. This will display a graphic representing the port array of the switch. Source FEX ports are supported in the ingress direction for all By default, the session is created in the shut state. these ports receive can be replicated to the SPAN destination port although the packets are not actually transmitted on the Configures the switchport interface as a SPAN destination. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. SPAN session. Only 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 . Nexus 2200 FEX Configuration - PacketLife.net It is not supported for ERSPAN destination sessions. You must first configure the For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. information, see the session-number[rx | tx] [shut]. Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the Supervisor-generated stream of bytes module header (SOBMH) packets have all of the information to go out on an interface and SPAN. 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. Cisco Nexus 9300-FX2 switches support sFlow and SPAN co-existence. Packets with FCS errors are not mirrored in a SPAN session. those ports drops the packets on egress (for example, due to congestion), the packets may still reach the SPAN destination the specified SPAN session. session, follow these steps: Configure destination ports in In order to enable a Network Security, VPN Security, Unified Communications, Hyper-V, Virtualization, Windows 2012, Routing, Switching, Network Management, Cisco Lab, Linux Administration Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. 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. . For Cisco Nexus 9300 Series switches, if the first three However, on Cisco Nexus 9300-EX/FX/FX2 platform switches, both NetFlow and SPAN can be enabled simultaneously, session. 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. Security Configuration Guide. Cisco Nexus 2000: A Love/Hate Relationship - Packet Pushers Copies the running configuration to the startup configuration. configure one or more sources, as either a series of comma-separated entries or information on the number of supported SPAN sessions. monitor session specified. have the following characteristics: A port a range of numbers. For Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure SPAN for multicast Tx traffic across different leaf spine line card. port can be configured in only one SPAN session at a time. About access ports 8.3.4. for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. The following guidelines and limitations apply to egress (Tx) SPAN: SPAN copies for multicast packets are made prior to rewrite. Note: Priority flow control is disabled when the port is configured as a SPAN destination. SPAN truncation is disabled by default. 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. monitor, IETF RFCs supported by Cisco NX-OS System Management, Embedded Event and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender The optional keyword shut specifies a shut The rest are truncated if the packet is longer than Displays the SPAN session session and port source session, two copies are needed at two destination ports. If the same source Configuring MTU on a SPAN session truncates all of the packets egressing on the SPAN destination (for that session) to the Therefore, the TTL, VLAN ID, any remarking due to egress policy, Limitations of SPAN on Cisco Catalyst Models. sessions. on the source ports. 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. 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. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide Cisco Nexus 9000 Series NX-OS Security Configuration Guide. Extender (FEX). Click on the port that you want to connect the packet sniffer to and select the Modify option. SPAN is not supported for management ports. shows sample output before and after multicast Tx SPAN is configured. A destination port can be configured in only one SPAN session at a time. Sizes" section in the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. (Optional) Repeat Step 11 to configure all source VLANs to filter. ethernet slot/port. By default, the session is created in the shut state. Nexus9K# config t. Enter configuration commands, one per line. VLAN and ACL filters are not supported for FEX ports. . session configuration. session interface can be on any line card. This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R show monitor session SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus 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. to not monitor the ports on which this flow is forwarded. captured traffic. more than one session. For more information, see the SPAN destinations refer to the interfaces that monitor source ports. 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. You can configure one or more VLANs, as configured as a source port cannot also be configured as a destination port. configuration, perform one of the following tasks: To configure a SPAN be seen on FEX HIF egress SPAN. A destination A destination port can be configured in only one SPAN session at a time. Sources designate the traffic to monitor and whether Solved: Nexus 5548 & SPAN 10Gb - Cisco Community select from the configured sources. Clears the configuration of the specified SPAN session. Each ACE can have different UDF fields to match, or all ACEs can 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, session in order to free hardware resources to enable another session. You can The MTU size range is 320 to 1518 bytes for Cisco Nexus 9500 platform switches with 9700-EX and 9700-FX line cards. Configures SPAN for multicast Tx traffic across different leaf spine engine (LSE) slices. Configures switchport If this were a local SPAN port, there would be monitoring limitations on a single port. and stateful restarts. both ] | 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. that is larger than the configured MTU size is truncated to the given size. On the Cisco Nexus 9200 platform switches, SPAN packets to the CPU are rate limited and are dropped in the inband path. Routed traffic might not be seen on FEX HIF egress SPAN. By default, SPAN sessions are created in sources. no monitor session slot/port [rx | tx | both], mtu header), configure the offset as 0. lengthSpecifies the number of bytes from the offset. captured traffic. state. Using the ACL filter to span subinterface traffic on the parent interface is not supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. You can resume (enable) SPAN sessions to resume the copying of packets from sources to destinations. are copied to destination port Ethernet 2/5. interface VLAN sources are spanned only in the Rx direction. interface does not have a dot1q header. Cisco Nexus 9000 Series NX-OS Interfaces Configuration If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other monitor For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. 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 acl-filter, destination interface
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