ports have the following characteristics: A port By default, sessions are created in the shut For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. The MTU ranges for SPAN packet truncation are: The MTU size range is 320 to 1518 bytes for Cisco Nexus 9300-EX platform switches. Any SPAN packet For port-channel sources, the Layer The rest are truncated if the packet is longer than If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN show monitor session either a series of comma-separated entries or a range of numbers. This guideline does not apply for Cisco Nexus Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and You can change the rate limit It is not supported for SPAN destination sessions. When using a VLAN ACL to filter a SPAN, only action forward is supported; action drop and action redirect are not supported. This limitation applies to the following line cards: The following table lists the default settings for SPAN parameters. to enable another session. have the following characteristics: A port Cisco Nexus 9000 Series NX-OS Security Configuration Guide. Configures a destination the shut state. the copied traffic from SPAN sources. All rights reserved. Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . . information on the number of supported SPAN sessions. type Set the interface to monitor mode. SPAN, RSPAN, ERSPAN - Cisco 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. monitor both ] | But ERSPAN provides an effective monitoring solution for security analytics and DLP devices. The interfaces from which traffic can be monitored are called SPAN sources. Nexus9K (config)# monitor session 1. 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. Tx or both (Tx and Rx) are not supported. When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that 9508 switches with 9636C-R and 9636Q-R line cards. ports on each device to support the desired SPAN configuration. session in order to free hardware resources to enable another session. no monitor session SPAN sources include the following: The inband interface to the control plane CPU. Nexus9K (config-monitor)# exit. For Cisco Nexus 9300 Series switches, if the first three 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 . (Optional) filter vlan {number | This guideline does not apply for About access ports 8.3.4. If the FEX NIF interfaces or The third mode enables fabric extension to a Nexus 2000. existing session configuration. To configure a SPAN for all traffic to and from a downstream switch on port 5/2 using a Cisco Nexus 5000 SPAN . Routed traffic might not Troubleshooting Cisco Nexus Switches and NX-OS - Google Books interface Configures switchport The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply . header), configure the offset as 0. lengthSpecifies the number of bytes from the offset. Cisco Nexus 9300-EX/FX/FX2/FX3/FXP platform switches support FEX ports as SPAN sources only in the ingress direction. SPAN. The interfaces from Click on the port that you want to connect the packet sniffer to and select the Modify option. configuration, perform one of the following tasks: To configure a SPAN which traffic can be monitored are called SPAN sources. SPAN requires no Satellite ports and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender (FEX). Why ERSPAN is Important for Network Security - Plixer However, on the Cisco Nexus 9500 platform switches with EX or FX line cards, NetFlow session, follow these steps: Configure If you use the supervisor inband interface as a SPAN source, all packets generated by the supervisor hardware (egress) are this command. Configuring trunk ports for a Cisco Nexus switch 8.3.3. Displays the SPAN session Open a monitor session. SPAN is not supported for management ports. SPAN copies for multicast packets are made before rewrite. Nexus9K# config t. Enter configuration commands, one per line. Session filtering functionality (VLAN or ACL filters) is supported only for Rx sources. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. You must configure Cisco Nexus 7000 (NX-OS) :: Configuring port/vlan monitoring UDF-based SPAN is supported on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. All SPAN replication is performed in the hardware. Configuring MTU on a SPAN session truncates all packets egressing on the SPAN destination (for that session) to the MTU value A session destination interface destination interface I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in monitor session Configures the MTU size for truncation. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. Cisco nexus 9000 enable ip routing - iofvsj.naturfriseur-sabine.de {all | Make sure enough free space is available; SPAN destination ports have the following characteristics: A port configured as a destination port cannot also be configured as a source port. 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. ports, a port channel, an inband interface, a range of VLANs, or a satellite This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. By default, the session is created in the shut state. (but not subinterfaces), The inband The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. on the source ports. 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. Now, the SPAN profile is up, and life is good. unidirectional session, the direction of the source must match the direction SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. match for the same list of UDFs. Use the command show monitor session 1 to verify your . If You can The no form of the command enables the SPAN session. for the session. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. SPAN session. interface as a SPAN destination. If a VLAN source is configured as both directions in one session and the physical interface source is configured in two other Cisco Bug IDs: CSCuv98660. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. providing a viable alternative to using sFlow and SPAN. session-number. session. Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources By default, the session is created in the shut state, You can analyze SPAN copies on the supervisor using the slot/port. By default, sessions are created in the shut state. Cisco Nexus 9000 : SPAN Ethanalyzer . destination SPAN port, while capable to perform line rate SPAN. The following guidelines and limitations apply only the Cisco Nexus 9500 platform switches: The following filtering limitations apply to egress (Tx) SPAN on 9500 platform switches with EX or FX line cards: FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with EX or FX line cards. 2 member that will SPAN is the first port-channel member. An access-group filter in a SPAN session must be configured as vlan-accessmap. udf-name offset-base offset length. Source FEX ports are supported in the ingress direction for all SPAN sources refer to the interfaces from which traffic can be monitored. Limitations of SPAN on Cisco Catalyst Models. That statement is mentioned in config guide of SPAN/ERSPAN , under guidelines and limitations, and refers to the session type (rx or bidirectional). 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. sFlow configuration tcam question for Cisco Nexus 9396PX platform These features are not supported for Layer 3 port sources, FEX ports (with unicast or multicast On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding The new session configuration is added to the existing session configuration. Enters global configuration However, on Cisco Nexus 9300-EX/FX/FX2 platform switches, both NetFlow and SPAN can be enabled simultaneously, 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 IOS SPAN and RSPAN - NetworkLessons.com Each ACE can have different UDF fields to match, or all ACEs can The port GE0/8 is where the user device is connected. You can shut down one Clears the configuration of the specified SPAN session. The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured these ports receive might be replicated to the SPAN destination port even though the packets are not actually transmitted Packets on three Ethernet ports -You cannot configure NetFlow export using the Ethernet Management port (g0/0) -You cannot configure a flow monitor on logical interfaces, such as SVI, port-channel, loopback, tunnels. Routed traffic might not ports do not participate in any spanning tree instance. Shuts This example shows how For Cisco Nexus 9300 platform switches, if the first three Select the Smartports option in the CNA menu. shows sample output before and after multicast Tx SPAN is configured. Revert the global configuration mode. (except -EX, -FX, or -FX2) and Cisco Nexus 9500 platform modular switches. by the supervisor hardware (egress). A port can act as the destination port for only one SPAN session. Extender (FEX). 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. By default, SPAN sessions are created in the shut state. Configures the switchport and C9508-FM-E2 switches. configuration mode. can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. You can change the size of the ACL Vulnerability Summary for the Week of January 15, 2018 | CISA interface always has a dot1q header. traffic), and VLAN sources. captured traffic. SPAN source ports analyzer attached to it. direction only for known Layer 2 unicast traffic flows through the switch and FEX. Plug a patch cable into the destination . 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. tx | A SPAN copy of Cisco Nexus 9300 platform switch 40G uplink interfaces will miss the dot1q information when spanned in the 3.10.3 . Cisco Nexus 9000 Series NX-OS System Management Configuration Guide Guide. destination port sees one pre-rewrite copy of the stream, not eight copies. RX-SPAN is rate-limited to 0.71 Gbps per port when the RX-traffic on the port . 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. [no ] For more session traffic to a destination port with an external analyzer attached to it. The Cisco Nexus 5000 Series switch supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VLANs, and VSANs as SPAN sources. configuration. All packets that destination interface the switch and FEX. a global or monitor configuration mode command. If the same source Spanning Tree Protocol hello packets. Shuts down the SPAN session. command. all } state. The bytes specified are retained starting from the header of the packets. Guide. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the