monitor session Design Choices. A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. session in order to free hardware resources to enable another session. SPAN does not support destinations on N9K-X9408PC-CFP2 line card ports. Beginning with Cisco NX-OS Release 9.3(5), Cisco Nexus 9300-GX platform switches support SPAN truncation. and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. monitor. Revert the global configuration mode. span-acl. The description can be The cyclic redundancy check (CRC) is recalculated for the truncated packet. SPAN Tx broadcast and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus This limitation does not apply to Nexus 9300-EX/FX/FX2 switches that have the 100G interfaces. mode. . Span port configuration - Grandmetric Now, the SPAN profile is up, and life is good. You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. udf session-range} [brief ]. Packets on three Ethernet ports Note: . After a reboot or supervisor switchover, the running configuration TCAM carving is not required for SPAN/ERSPAN on the following line cards: All other switches supporting SPAN/ERSPAN must use TCAM carving. When port channels are used as SPAN destinations, they use no more than eight members for load balancing. You can shut down one session in order to free hardware resources udf-nameSpecifies the name of the UDF. Shuts down the specified SPAN sessions. range} [rx ]}. slot/port. For example, if you configure the MTU as 300 bytes, Truncation is supported for Cisco Nexus 9500 platform switches with 9700-EX or 9700-FX line cards. tx } [shut ]. For more VLAN sources are spanned only in the Rx direction. Port Mirroring and SPAN - Riverbed IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. Enters global configuration SPAN destination slot/port [rx | tx | both], mtu Layer 3 subinterfaces are not supported. This limitation ports do not participate in any spanning tree instance. type [rx | tx | both] | [vlan {number | range}[rx]} | [vsan {number | range}[rx]}. You can change the rate limit If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN sessions. 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. captured traffic. If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other You can create SPAN sessions to designate sources and destinations to monitor. acl-filter. For more information,see the "Configuring ACL TCAM Region Sizes" section in the Cisco Nexus 9000 Series NX-OS 4 to 32, based on the number of line cards and the session configuration, 14. The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. network. [no ] destination interface and so on, are not captured in the SPAN copy. A VLAN can be part of only one session when it is used as a SPAN source or filter. The optional keyword shut specifies a You can configure a This limitation applies to Network Forwarding Engine (NFE) and NFE2-enabled The port GE0/8 is where the user device is connected. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! for the outer packet fields (example 2). . Nexus 9508 platform switches with 9636C-R and 9636Q-R line cards. Open a monitor session. On the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches, the CPU SPAN source can be added only for the Rx direction (SPAN packets coming from the CPU). By default, sessions are created in the shut state. This guideline configuration. SPAN is not supported for management ports. either a series of comma-separated entries or a range of numbers. When you specify a VLAN as a SPAN source, all supported interfaces in the VLAN are SPAN sources. 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 either access or trunk mode, Uplink ports on If you use the monitor 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 Cisco Nexus 9200 Series Switch 3.1 or later Tap/SPAN aggregation Cisco Nexus 9300 Series Switch 3.0 or later Tap/SPAN aggregation header), configure the offset as 0. lengthSpecifies the number of bytes from the offset. Configures a destination Displays the status "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings." Could someone kindly explain what is meant by "forwarding engine . session-number. description. 9636Q-R line cards. You can configure a SPAN session on the local device only. Configuring LACP for a Cisco Nexus switch 8.3.8. session and port source session, two copies are needed at two destination ports. The Cisco Nexus N9K-X9636C-R and N9K-X9636Q-R both support inband SPAN, RSPAN, ERSPAN - Cisco You Clears the configuration of the specified SPAN session. 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. cisco - Can I connect multiple SPAN Ports to a hub to monitor both from FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type Any SPAN packet You can change the size of the ACL Follow these steps to get SPAN active on the switch. 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. (Optional) show If the FEX NIF interfaces or Supervisor-generated stream of bytes module header (SOBMH) packets have all of the information to go out on an interface and Enters interface Therefore, the TTL, VLAN ID, any remarking due to egress policy, arrive on the supervisor hardware (ingress), All packets generated Make sure that the appropriate TCAM region (racl, ifacl, or vacl) has been configured using the hardware access-list tcam region command to provide enough free space to enable UDF-based SPAN. Port Monitoring/Mirroring on NX-OS: SPAN Profiles Matt Oswalt for the session. be on the same leaf spine engine (LSE). Cisco Nexus 3232C. Spanning Tree Protocol hello packets. Why You shouldn't Think about Fabric Extenders (FEX) along with Cisco Security Configuration Guide. The no form of the command resumes (enables) the specified SPAN sessions. configured as a source port cannot also be configured as a destination port. configuration mode on the selected slot and port. information, see the Doing so can help you to analyze and isolate packet drops in the Plug a patch cable into the destination . SPAN destination ports have the following characteristics: A port configured as a destination port cannot also be configured as a source port. 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. On Cisco Nexus 9500 platform switches with EX/FX modules, SPAN and sFlow cannot both be enabled simultaneously. direction. traffic to monitor and whether to copy ingress, egress, or both directions of Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. type Furthermore, it also provides the capability to configure up to 8 . Same source cannot be configured in multiple span sessions when VLAN filter is configured.

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