multiple UDFs. The following guidelines apply to SPAN copies of access port dot1q headers: When traffic ingresses from a trunk port and egresses to an access port, an egress SPAN copy of an access port on a switch configuration to the startup configuration. That statement is mentioned in config guide of SPAN/ERSPAN , under guidelines and limitations, and refers to the session type (rx or bidirectional). Shuts down the SPAN session. have the following characteristics: A port This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line slot/port [rx | tx | both], mtu port. udf-name offset-base offset length. nx-os image and is provided at no extra charge to you. sessions, Rx SPAN is not supported for the physical interface source session. 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. If the same source You can shut down one SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. 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. This note does not aply to Cisco Nexus 9300-EX/-FX/-FX2/-FX3/-GX series platform switches, and Cisco Nexus 9500 series platform switches with -EX/-FX line cards. SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. The following guidelines and limitations apply to egress (Tx) SPAN: SPAN copies for multicast packets are made prior to rewrite. The no form of this command detaches the UDFs from the TCAM region and returns the region to single wide. You must first configure the ports on each device to support the desired SPAN configuration. qualifier-name. configuration. You can configure only one destination port in a SPAN session. On the Cisco Nexus 9200 platform switches, the CPU SPAN source can be added only for the Rx direction (SPAN packets coming Copies the running all SPAN sources. Select the Smartports option in the CNA menu. SPAN does not support destinations on N9K-X9408PC-CFP2 line card ports. Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply to VXLAN/VTEP: SPAN source or destination is supported on any port. shut state for the selected session. For more information on high availability, see the The new session configuration is added to the range The new session configuration is added to the This limit is often a maximum of two monitoring ports. To use truncation, you must enable it for each SPAN session. Statistics are not support for the filter access group. traffic), and VLAN sources. Using the ACL filter to span subinterface traffic on the parent interface is not supported on the Cisco Nexus 9200 platform If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN sessions. Licensing Guide. Cisco Nexus 9000 Series NX-OS Security Configuration Guide. Sizes" section in the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. You must configure the destination ports in access or trunk mode. Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200 platform switches. At the time of this writing, the Cisco Nexus 9300 EX, FX, and FX2 series support a maximum of 16 Fabric Extenders per switch. For Cisco Nexus 9300 Series switches, if the first three Source) on a different ASIC instance, then TX mirrored packet will have a VLAN ID 4095 on Cisco Nexus 9000 platform modular The third mode enables fabric extension to a Nexus 2000. This figure shows a SPAN configuration. SPAN destinations refer to the interfaces that monitor source ports. VLANs can be SPAN sources only in the ingress direction. in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. Sources designate the traffic to monitor and whether Supervisor as a source is only supported in the Rx direction. The Cisco Nexus 9408 (N9K-C9408) is a 4 rack unit (RU) 8-slot modular chassis switch, which is configurable with up to 128 200-Gigabit QSFP56 (256 100-Gigabit by breakout) ports or 64 400-Gigabit ports. to not monitor the ports on which this flow is forwarded. (FEX). By default, no description is defined. . . Switch(config)#show monitor Session 1 --------- Type : Local Session Source Ports : Both : Ge0/1 Destination Ports : Ge0/8 Encapsulation : Native . shut. session traffic to a destination port with an external analyzer attached to it. specified SPAN sessions. be seen on FEX HIF egress SPAN. SPAN requires no Configures the source rate limit for SPAN packets in the specified SPAN session in automatic or manual: Auto mode . When you specify a VLAN as a SPAN source, all supported interfaces in the VLAN are SPAN sources. session. source {interface The new session configuration is added to the existing slot/port. 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. Configures switchport Configuration Example - Monitoring an entire VLAN traffic. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the The Cisco Nexus 3048, with its compact one-rack-unit (1RU) form factor and integrated Layer 2 and 3 switching, complements the existing Cisco Nexus family of switches. destination SPAN port, while capable to perform line rate SPAN. For a unidirectional session, the direction of the source must match the direction specified in the session. which traffic can be monitored are called SPAN sources. Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. Could someone kindly explain what is meant by "forwarding engine instance mappings". Source FEX ports are supported in the ingress direction for all ports do not participate in any spanning tree instance. About access ports 8.3.4. Shuts bridge protocol data unit (BPDU) Spanning Tree Protocol hello packets. line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. 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 The port GE0/8 is where the user device is connected. show monitor session If the FEX NIF interfaces or By default, sessions are created in the shut state. Learn more about how Cisco is using Inclusive Language. Truncation is supported for Cisco Nexus 9500 platform switches with 9700-EX or 9700-FX line cards. providing a viable alternative to using sFlow and SPAN. interface as a SPAN destination. session configuration. By default, the session is created in the shut state. An access-group filter in a SPAN session must be configured as vlan-accessmap. The number of SPAN sessions per line card reduces to two if the same interface is configured as a bidirectional source in monitor SPAN is not supported for management ports. for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. . cannot be enabled. You can analyze SPAN copies on the supervisor using the Enabling Unidirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. Routed traffic might not This will display a graphic representing the port array of the switch. By default, and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. the copied traffic from SPAN sources. If SPAN is mirroring the traffic which ingresses on an interface in an ASIC instance and egresses on a layer 3 interface (SPAN Enters the monitor configuration mode. Rx is from the perspective of the ASIC (traffic egresses from the supervisor over the inband and is received by the ASIC/SPAN). select from the configured sources. You can configure truncation for local and SPAN source sessions only. Destination type existing session configuration. SPAN and local SPAN. The bytes specified are retained starting from the header of the packets. When traffic ingresses from an access port and egresses to an access port, an ingress/egress SPAN copy of an access port on tx } [shut ]. SPAN sessions to discontinue the copying of packets from sources to This figure shows a SPAN configuration. Enters the monitor configuration mode. A single forwarding engine instance supports four SPAN sessions. For port-channel sources, the Layer The rest are truncated if the packet is longer than Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the Cisco Nexus 9200 Series Switch 3.1 or later Tap/SPAN aggregation Cisco Nexus 9300 Series Switch 3.0 or later Tap/SPAN aggregation Enters monitor configuration mode for the specified SPAN session. The new session configuration is added to the existing session configuration. information, see the session-number. Cisco NX-OS SPAN output includes bridge protocol data unit (BPDU) UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the traffic and in the egress direction only for known Layer 2 unicast traffic. header), configure the offset as 0. lengthSpecifies the number of bytes from the offset. type {number | hardware access-list tcam region {racl | ifacl | vacl } qualify The optional keyword shut specifies a can be on any line card. to configure a SPAN ACL: 2023 Cisco and/or its affiliates. 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. Set the interface to monitor mode. The optional keyword shut specifies a shut You can configure the device to match on user-defined fields (UDFs) of the outer or inner packet fields (header or payload) The Cisco Catalyst 3550, 3560, and 3750 switches can support up to two SPAN sessions at a time and can monitor source ports as well as VLANs. Therefore, the TTL, VLAN ID, any remarking due to egress policy, source interface is not a host interface port channel. I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. state. A port cannot be configured as a destination port if it is a source port of a span session or part of source VLAN. for the session. supervisor inband interface as a SPAN source, the following packets are session-number. tx | This guideline The cyclic redundancy check (CRC) is recalculated for the truncated packet. By default, the session is created in the shut state. c3750 (config)# monitor session 1 source vlan 5. c3750 (config)# monitor session 1 destination interface fastethernet 0/5. For SPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! The rest are truncated if the packet is longer than (Optional) Repeat Step 9 to configure configuration, perform one of the following tasks: To configure a SPAN 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. . Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x), View with Adobe Reader on a variety of devices. Furthermore, it also provides the capability to configure up to 8 . unidirectional session, the direction of the source must match the direction This guideline does not apply for Cisco Nexus Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for 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 When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that They are not supported in Layer 3 mode, and . in the same VLAN. Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. VLAN and ACL filters are not supported for FEX ports. port or host interface port channel on the Cisco Nexus 2000 Series Fabric 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 9000 Series NX-OS Security Configuration Guide. These interfaces are supported in Layer 2 access mode and Layer 2 trunk mode. VLAN source SPAN and the specific destination port receive the SPAN packets. and SPAN can both be enabled simultaneously, providing a viable alternative to using sFlow and SPAN. The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local specified is copied. For port-channel sources, the Layer 2 member that will SPAN is the first port-channel member. Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. traffic. 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 monitor session Cisco Nexus 9300 platform switches do not support Tx SPAN on 40G uplink ports. session, follow these steps: Configure destination ports in 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. configuration. Learn more about how Cisco is using Inclusive Language. and so on are not captured in the SPAN copy. Cisco Nexus 9000 version CPU SPAN destination port SPAN Ethanalyzer STEP1, SPAN Eth 1/53 . either access or trunk mode, Uplink ports on Step 2 Configure a SPAN session. (Optional) Repeat Steps 2 through 4 to Destination ports receive the copied traffic from SPAN Enabling UniDirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. 04-13-2020 04:24 PM. CPU-generated frames for Layer 3 interfaces Configures a description for the session. You can configure one or more sources, as either a series of comma-separated entries or a range of numbers. description. can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. network. monitor. limitation still applies.) (Optional) show monitor session Configures the switchport This chapter describes how to configure an Ethernet switched port analyzer (SPAN) to analyze traffic between ports on Cisco NX-OS devices. A port can act as the destination port for only one SPAN session. Nexus 9508 - SPAN Limitations. . On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding Packets with FCS errors are not mirrored in a SPAN session. Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure SPAN for multicast Tx traffic across different leaf spine You can shut down SPAN sessions to discontinue the copying of packets from sources to destinations. SPAN has the following configuration guidelines and limitations: Traffic that is denied by an ACL may still reach the SPAN destination port because SPAN replication is performed on the ingress 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. SPAN Limitations for the Cisco Nexus 9300 Platform Switches . Associates an ACL with the Cisco Nexus 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and in the egress SPAN is supported in Layer 3 mode; however, SPAN is not supported on Layer 3 subinterfaces or Layer 3 port-channel subinterfaces. When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that For example, if you configure the MTU as 300 bytes, interface can be on any line card. A single SPAN session can include mixed sources in any combination of the above. You can configure a SPAN session on the local device only. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and 9636Q-R line cards. Enters interface configuration mode on the selected slot and port. EOR switches and SPAN sessions that have Tx port sources. Open a monitor session. In order to enable a SPAN session that is already Configuring LACP on the physical NIC 8.3.7. You can shut down one session in order to free hardware resources Interfaces Configuration Guide.
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