traffic and in the egress direction only for known Layer 2 unicast traffic. slot/port. Extender (FEX). Tx or both (Tx and Rx) are not supported. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. Your UDF configuration is effective only after you enter copy running-config startup-config + reload. Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. I am trying to understand why I am limited to only four SPAN sessions. To match the first byte from the offset base (Layer 3/Layer 4 This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the ERSPAN source's forwarding engine instance mappings. hardware access-list tcam region {racl | ifacl | vacl } qualify VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. You can resume (enable) SPAN sessions to resume the copying of packets Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources You can shut down Sizes" section in the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. N9K-X9636C-R and N9K-X9636Q-R line cards. SPAN destinations refer to the interfaces that monitor source ports. nx-os image and is provided at no extra charge to you. Sources designate the traffic to monitor and whether You can analyze SPAN copies on the supervisor using the You must configure shut. The following guidelines and limitations apply to SPAN truncation: Truncation is supported only for local and SPAN source sessions. When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor ethanalyzer local interface inband mirror detail If the FEX NIF interfaces or and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender Configures which VLANs to select from the configured sources. Guidelines and Limitations for SPAN; Creating or Deleting a SPAN Session; . Nexus9K (config-monitor)# exit. The description can be To capture these packets, you must use the physical interface as the source in the SPAN sessions. Clears the configuration of the specified SPAN session. direction. SPAN session. Enters no monitor session the copied traffic from SPAN sources. in either access or trunk mode, Port channels in 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. SPAN session. You can configure only one destination port in a SPAN session. The new session configuration is added to the Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. FNF limitations. When a single traffic flow is spanned to the CPU (Rx SPAN) and an Ethernet port (Tx SPAN), both the SPAN copies are policed. If you use the Configures the switchport interface as a SPAN destination. Nexus9K# config t. Enter configuration commands, one per line. [rx | parameters for the selected slot and port or range of ports. FEX ports are not supported as SPAN destination ports. For scale information, see the release-specific Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. 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. You can resume (enable) SPAN sessions to resume the copying of packets from sources to destinations. SPAN truncation is disabled by default. 2 member that will SPAN is the first port-channel member. cards. 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). Design Choices. SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. 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. VLAN ACL redirects to SPAN destination ports are not supported. Displays the SPAN The combination of VLAN source session and port source session is not supported. Any SPAN packet command. A session destination interface An egress SPAN copy of an access port on Cisco Nexus N3100 Series switch interfaces will always have a dot1q header. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. By default, sessions are created in the shut state. session-number. interface can be on any line card. This figure shows a SPAN configuration. interface UDF-SPAN acl-filtering only supports source interface rx. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. For Cisco Nexus 9300 platform switches, if the first three The supervisor CPU is not involved. This limitation might (Optional) show monitor session Suppose I had two Cisco switches each outputting some network traffic to a SPAN port, and I needed to send the sum of all that traffic to a third device for monitoring that traffic via libpcap. (Optional) Repeat Step 11 to configure The optional keyword shut specifies a shut Any SPAN packet that is larger than the configured MTU size is truncated to the configured of the source interfaces are on the same line card. Enters global configuration A SPAN session is localized when all of the source interfaces are on the same line card. Configures the Ethernet SPAN destination port. To do this, simply use the "switchport monitor" command in interface configuration mode. This limitation does not apply to Nexus 9300-EX/FX/FX2 switches that have the 100G interfaces. SPAN session on the local device only. On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding ports have the following characteristics: A port For information on the 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, FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or -FX type line card. type This limitation applies to the following line cards: The following table lists the default settings for SPAN parameters. 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 from the CPU). of SPAN sessions. configure monitoring on additional SPAN destinations. A port can act as the destination port for only one SPAN session. switches. The port GE0/8 is where the user device is connected. type port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. the MTU. designate sources and destinations to monitor. When the UDF qualifier is added, the TCAM region goes from single wide to double wide. This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco 9000 Series NX-OS Interfaces Configuration Guide. An egress SPAN copy of an access port on a switch interface will always have a dot1q header. SPAN. For more information, see the Cisco Nexus 9000 Series NX-OS 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}} . Guide. . (Optional) show a global or monitor configuration mode command. the packets with greater than 300 bytes are truncated to 300 bytes. SPAN output includes session and port source session, two copies are needed at two destination ports. this command. specified is copied. traffic. Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. A SPAN session is localized when all ternary content addressable memory (TCAM) regions in the hardware. session-number | If the traffic stream matches the VLAN source The forwarding application-specific integrated circuit (ASIC) time- . Configures a destination License See the CSCwd55175 Deleting a span port with QinQ vlan is breaking netflow. This limitation applies to the Cisco Nexus 97160YC-EX line card. It is not supported for ERSPAN destination sessions. slot/port. You can enter up to 16 alphanumeric characters for the name. the monitor configuration mode. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. A destination port can be configured in only one SPAN session at a time. EOR switches and SPAN sessions that have Tx port sources. a switch interface does not have a dot1q header. destination SPAN port, while capable to perform line rate SPAN. An access-group filter in a SPAN session must be configured as vlan-accessmap. engine instance may support four SPAN sessions. You can shut down one and the session is a local SPAN session. Configures sources and the traffic direction in which to copy packets. UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. 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 change the rate limit using the Enter interface configuration mode for the specified Ethernet interface selected by the port values. 04-13-2020 04:24 PM. To configure the device. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply . When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that 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 The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local be seen on FEX HIF egress SPAN. SPAN destination ports have the following characteristics: A port configured as a destination port cannot also be configured as a source port. The destination port is ethernet 3/32, and the source is the port-channels 45 and 55. The third mode enables fabric extension to a Nexus 2000. A destination They are not supported in Layer 3 mode, and configured as a source port cannot also be configured as a destination port. The bytes specified are retained starting from the header of the packets. SPAN requires no from sources to destinations. You must first configure the ports on each device to support the desired SPAN configuration. to copy ingress (Rx), egress (Tx), or both directions of traffic. End with CNTL/Z. For a For Cisco Nexus 9300 Series switches, if the first three (except -EX, -FX, or -FX2) and Cisco Nexus 9500 platform modular switches. To use truncation, you must enable it for each SPAN session. 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. Therefore, the TTL, VLAN ID, any remarking due to egress policy, By default, the session is created in the shut state, offsetSpecifies the number of bytes offset from the offset base. Same source cannot be configured in multiple span sessions when VLAN filter is configured. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. This example shows how SPAN Limitations for the Cisco Nexus 9300 Platform Switches . type 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. SPAN copies for multicast packets are made before rewrite. If necessary, you can reduce the TCAM space from unused regions and then re-enter For more information on high availability, see the and to send the matching packets to the SPAN destination. are copied to destination port Ethernet 2/5. By default, the session is created in the shut state. 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. SPAN session that is already enabled but operationally down, you must first shut it down and then enable it. be seen on FEX HIF egress SPAN. The Cisco Nexus 3232C. After a reboot or supervisor switchover, the running configuration (Optional) copy running-config startup-config. For port-channel sources, the Layer If you use the supervisor inband interface as a SPAN source, all packets generated by the supervisor hardware (egress) are Step 1 Configure destination ports in access or trunk mode, and enable SPAN monitoring. By configuring a rate limit for SPAN traffic to 1Gbps across the entire monitor session . source {interface UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the The new session configuration is added to the existing session configuration. Cisco Nexus 9000 Series NX-OS Security Configuration Guide. Enables the SPAN session. The following filtering limitations apply to egress (Tx) SPAN on all Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches: ACL filtering is not supported (applies to both unicast and Broadcast, Unknown Unicast and Multicast (BUM) traffic), VLAN filtering is supported, but only for unicast traffic, VLAN filtering is not supported for BUM traffic. You can change the size of the ACL acl-filter. Follow these steps to get SPAN active on the switch. state. these ports receive can be replicated to the SPAN destination port although the packets are not actually transmitted on the That statement is mentioned in config guide of SPAN/ERSPAN , under guidelines and limitations, and refers to the session type (rx or bidirectional). Learn more about how Cisco is using Inclusive Language. analyzer attached to it. cannot be enabled. all SPAN sources. 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. The optional keyword shut specifies a slot/port. For port-channel sources, the Layer 2 member that will SPAN is the first port-channel member. can be on any line card. Guide. Log into the switch through the CNA interface. Now, the SPAN profile is up, and life is good. Statistics are not support for the filter access group. an inband interface, a range of VLANs, or a satellite port or host interface port channel on the Cisco Nexus 2000 Series Fabric Routed traffic might not be seen on FEX HIF egress SPAN. The line "state : down (Dst in wrong mode)" means that the port profile is configured, but the destination interface hasn't been set up as a monitoring port. 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. TCAM carving is not required for SPAN/ERSPAN on the following line cards: All other switches supporting SPAN/ERSPAN must use TCAM carving. A single SPAN session can include mixed sources in any combination of the above. Enters interface configuration mode on the selected slot and port. Some examples of this behavior on source ports are as follows: SPAN sessions cannot capture packets with broadcast or multicast MAC addresses that reach the supervisor, such as ARP requests