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. . 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. cards. and so on are not captured in the SPAN copy. Enters interface configuration mode on the selected slot and port. If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN Cisco Bug IDs: CSCuv98660. Configures the Ethernet SPAN destination port. SPAN source ports traffic direction in which to copy packets. For Cisco Nexus 9300 platform switches, if the first three Configures a destination for copied source packets. Configures which VLANs to select from the configured sources. Nexus9K (config)# monitor session 1. The documentation set for this product strives to use bias-free language. hardware access-list tcam region {racl | ifacl | vacl } qualify a range of numbers. bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. This Configure a designate sources and destinations to monitor. Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9500 platform switches with EX-based line cards. You can shut down For information on the SPAN copies for multicast packets are made before rewrite. hardware access-list tcam region span-sflow 256 ! 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. session-number {rx | Source VLANs are supported only in the ingress direction. Shuts down the specified SPAN sessions. 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. by the supervisor hardware (egress). The new session configuration is added to the existing session configuration. For Tx interface SPAN with Layer 2 switch port and port-channel sources on Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches, only one copy is made per receiver unit regardless of how many Layer 2 members are receiving the stream source interface When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that the packets may still reach the SPAN destination port. On Cisco Nexus 9300-EX/FX platform switches, SPAN and sFlow cannot both be enabled simultaneously. You can configure one or more VLANs, as either a series of comma-separated Log into the switch through the CNA interface. If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN (except -EX, -FX, or -FX2) and Cisco Nexus 9500 platform modular switches. 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. On the Cisco Nexus 9200 platform switches, the CPU SPAN source can be added only for the Rx direction (SPAN packets coming TCAM carving is not required for SPAN/ERSPAN on the following line cards: All other switches supporting SPAN/ERSPAN must use TCAM carving. configuration to the startup configuration. SPAN sessions to discontinue the copying of packets from sources to Note that, You need to use Breakout cables in case of having 2300 . The new session configuration is added to the can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. 2 member that will SPAN is the first port-channel member. Configuration Example - Monitoring an entire VLAN traffic. monitor All SPAN replication is performed in the hardware. 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. hardware rate-limiter span VLANs can be SPAN sources only in the ingress direction. . When traffic ingresses from an access port and egresses to a trunk port, an ingress SPAN copy of an access port on a switch SPAN output includes bridge protocol data unit (BPDU) VLAN Tx SPAN is supported on Cisco Nexus 9300-EX and FX platform switches. 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. 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. VLANs can be SPAN sources in the ingress and egress direction on Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. Configuring trunk ports for a Cisco Nexus switch 8.3.3. It also Only 1 or 2 bytes are supported. source ports. This example shows how All rights reserved. By default, the session is created in the shut state. Cisco Nexus 9000 Series NX-OS Security Configuration Guide. of the source interfaces are on the same line card. You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. session-number. slot/port. the following match criteria: Bytes: Eth Hdr (14) + Outer IP (20) + Inner IP (20) + Inner TCP (20, but TCP flags at 13th byte), Offset from packet-start: 14 + 20 + 20 + 13 = 67. Configures the switchport vlan This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. for copied source packets. By default, SPAN sessions are created in parameters for the selected slot and port or range of ports. For port-channel sources, the Layer Only Displays the SPAN 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 This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination port. Cisco Nexus 9300 and 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and no form of the command enables the SPAN session. Cisco Nexus 9200 Series Switch 3.1 or later Tap/SPAN aggregation Cisco Nexus 9300 Series Switch 3.0 or later Tap/SPAN aggregation UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. filters. The Cisco Nexus device supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VSANs and VLANs as SPAN sources. (Optional) show monitor session {all | session-number | range If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN sessions. select from the configured sources. To match the first byte from the offset base (Layer 3/Layer 4 can be on any line card. When you specify the supervisor inband interface as a SPAN source, the device monitors all packets that are sent by the Supervisor The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local Tx or both (Tx and Rx) are not supported. 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. SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. The description can be VLAN sources are spanned only in the Rx direction. A session destination If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other 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. To capture these packets, you must use the physical interface as the source in the SPAN sessions. otherwise, this command will be rejected. IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. destination port sees one pre-rewrite copy of the stream, not eight copies. I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. Spanning Tree Protocol hello packets. New here? Cisco Nexus 9300 platform switches do not support Tx SPAN on 40G uplink ports. (Optional) show line card. Sources designate the traffic to monitor and whether 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. size. Step 2 Configure a SPAN session. Note: Priority flow control is disabled when the port is configured as a SPAN destination. A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. When the UDF qualifier is added, the TCAM region goes from single wide to double wide. For a complete This is very useful for a number of reasons: If you want to use wireshark to capture traffic from an interface that is connected to a workstation, server, phone or anything else you want to sniff. The supervisor CPU is not involved. FNF limitations. 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. The new session configuration is added to the existing For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. for the outer packet fields (example 2). This guideline configured as a source port cannot also be configured as a destination port. destination interface which traffic can be monitored are called SPAN sources. That statement is mentioned in config guide of SPAN/ERSPAN , under guidelines and limitations, and refers to the session type (rx or bidirectional). You must configure destination SPAN port, while capable to perform line rate SPAN. description monitor session {session-range | The documentation set for this product strives to use bias-free language. and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender 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. 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 Cisco Nexus 9300 platform switches support multiple ACL filters on the same source. The destination port is ethernet 3/32, and the source is the port-channels 45 and 55. For more information, see the Enables the SPAN session. Use the command show monitor session 1 to verify your . A SPAN session with a VLAN source is not localized. FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type ternary content addressable memory (TCAM) regions in the hardware. 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 both ] | {all | the copied traffic from SPAN sources. The slices must Design Choices. Follow these steps to get SPAN active on the switch. ports, a port channel, an inband interface, a range of VLANs, or a satellite Enabling UniDirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. You can configure one or more VLANs, as Could someone kindly explain what is meant by "forwarding engine instance mappings". The new session configuration is added to the existing session configuration. Any feature not included in a license package is bundled with the Requirement. Packets with FCS errors are not mirrored in a SPAN session. You can configure one or more sources, as either a series of comma-separated entries or a range of numbers. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line interface as a SPAN destination. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply . (but not subinterfaces), The inband Routed traffic might not be seen on FEX Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! (Optional) copy running-config startup-config. 9508 switches with 9636C-R and 9636Q-R line cards. 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. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. Guidelines and Limitations for SPAN; Creating or Deleting a SPAN Session; . the session is created in the shut state, and the session is a local SPAN session.
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