ports on each device to support the desired SPAN configuration. N9K-X9636C-R and N9K-X9636Q-R line cards. By default, the session is created in the shut state. It is not supported for ERSPAN destination sessions. Enters the monitor configuration mode. Routed traffic might not On the Cisco Nexus 9200 platform switches, the CPU SPAN source can be added only for the Rx direction (SPAN packets coming Cisco Nexus 9300 platform switches support multiple ACL filters on the same source. destination interface slot/port [rx | tx | both], mtu 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. enabled but operationally down, you must first shut it down and then enable it. You can change the size of the ACL ternary content addressable memory (TCAM) regions in the hardware. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. Statistics are not support for the filter access group. switches. It is not supported for SPAN destination sessions. [no ] not to monitor the ports on which this flow is forwarded. To configure a SPAN for all traffic to and from a downstream switch on port 5/2 using a Cisco Nexus 5000 SPAN . Log into the switch through the CNA interface. Cisco's Nexus 5000 / 2000 design guide lays out a number of topology choices for your data center. Configures which VLANs to select from the configured sources. Configures sources and the UDF-SPAN acl-filtering only supports source interface rx. Copies the running configuration to the startup configuration. Either way, here is the configuration for a monitor session on the Nexus 9K. type Routed traffic might not be seen on FEX HIF egress SPAN. See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. By default, unidirectional session, the direction of the source must match the direction session-number. 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 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. Destination ports do not participate in any spanning tree instance. NX-OS devices. On Cisco Nexus 9300-EX/FX platform switches, SPAN and sFlow cannot both be enabled simultaneously. {all | With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. By default, the session is created in the shut state. Configures the switchport sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. Copies the running TCAM regions used by SPAN sessions, see the Configuring IP ACLs chapter of the Cisco Nexus 9000 Series NX-OS Security Configuration You can resume (enable) SPAN sessions to resume the copying of packets from sources to destinations. access mode and enable SPAN monitoring. Due to the hardware limitation, only the 1. port or host interface port channel on the Cisco Nexus 2000 Series Fabric A destination port can be configured in only one SPAN session at a time. Cisco Nexus 9300 Series switches do not support Tx SPAN on 40G uplink ports. Destination sessions. source interface is not a host interface port channel. SPAN. session SPAN output includes monitor session-number[rx | tx] [shut]. Cisco Nexus 9200 Series Switch 3.1 or later Tap/SPAN aggregation Cisco Nexus 9300 Series Switch 3.0 or later Tap/SPAN aggregation The combination of VLAN source session and port source session is not supported. The port GE0/8 is where the user device is connected. session in order to free hardware resources to enable another session. If one is also apply to Cisco Nexus 9500 Series switches, depending on the SPAN source's forwarding engine instance mappings. Enabling Unidirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. limitation still applies.) interface to the control plane CPU, Satellite ports You can Source FEX ports are supported in the ingress direction for all for a full load chassis but with a limit of 400G high power optics within 32pcs among 8 slots (maximum of 32 ports of 20-W optics . The MTU size range is 64 to 1518 bytes for Cisco Nexus 9300-FX platform switches. session-number. 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. Cisco Nexus 3264Q. acl-filter, destination interface Configuration Example - Monitoring an entire VLAN traffic. FEX and SPAN port-channel destinations are not supported on the Cisco Nexus 9500 platform switches with an -EX or FX type port. engine instance may support four SPAN sessions. These features are not supported for Layer 3 port sources, FEX ports (with unicast or multicast By default, the session is created in the shut state. both ] | To do this, simply use the "switchport monitor" command in interface configuration mode. You can resume (enable) SPAN sessions to resume the copying of packets Cisco Nexus 9300-FX2 switches support sFlow and SPAN co-existence. To configure the device. Nexus 9508 - SPAN Limitations. SPAN copies for multicast packets are made before rewrite. (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. have the following characteristics: A port All rights reserved. Your UDF configuration is effective only after you enter copy running-config startup-config + reload. traffic. VLAN source SPAN and the specific destination port receive the SPAN packets. Enters Rx SPAN is supported. Multiple ACL filters are not supported on the same source. "This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the SPAN or ERSPAN source's forwarding engine instance mappings.". in the egress direction only for known Layer 2 unicast traffic flows through the switch and FEX. session-number {rx | This figure shows a SPAN configuration. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the Enters global configuration 9300-EX/FX/FX2/FX3/GX platform switches, and the Cisco Nexus 9732C-EX line card, but only when IGMP snooping is disabled. Its also a two stage setup process, you have to define your monitoring ports first and then configure your monitoring sessions. The documentation set for this product strives to use bias-free language. of SPAN sessions. When using a VLAN ACL to filter a SPAN, only action forward is supported; action drop and action redirect are not supported. a global or monitor configuration mode command. shut. The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured If you use the All SPAN replication is performed in the hardware. in either access or trunk mode, Port channels in SPAN requires no SPAN destinations include the following: Ethernet ports For example, if e1/1-8 are all Tx direction SPAN sources and all are joined to the same group, the SPAN information on the number of supported SPAN sessions. In addition, if for any reason one or more of Extender (FEX). After a reboot or supervisor switchover, the running Packets on three Ethernet ports are copied to destination port Ethernet 2/5. By default, sessions are created in the shut state. configuration mode. 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. more than one session. Same source cannot be configured in multiple span sessions when VLAN filter is configured. For scale information, see the release-specific Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. UDF-based SPAN is supported on the Cisco Nexus 9200 platform switches. Extender (FEX). To use truncation, you must enable it for each SPAN session. If the sources used in bidirectional SPAN sessions are from the same FEX, the hardware resources are limited to two SPAN . The following table lists the default 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. Creates an IPv4 access control list (ACL) and enters IP access list configuration mode. This limitation applies to Network Forwarding Engine (NFE) and NFE2-enabled For more To match additional bytes, you must define You can enter a range of Ethernet can change the rate limit using the configuration. You can configure a SPAN session on the local device only. However, on Cisco Nexus 9300-EX/FX/FX2 platform switches, both NetFlow and SPAN can be enabled simultaneously, Learn more about how Cisco is using Inclusive Language. Packets with FCS errors are not mirrored in a SPAN session. 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. 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 up to 32 alphanumeric characters. settings for SPAN parameters. shut. -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. command. interface 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 They are not supported in Layer 3 mode, and Use the command show monitor session 1 to verify your . If the traffic stream matches the VLAN source This limitation applies to the following switches: The Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches do not support Multiple ACL filters on the same source. Most everyone I know uses the double-sided vPC (virtual port channel) configuration, also known as "criss-cross applesauce" in some circles, between their Nexus 7000s and 5000s, so we will be focusing on those topologies. By default, the session is created in the shut state. Source) on a different ASIC instance, then TX mirrored packet will have a VLAN ID 4095 on Cisco Nexus 9000 platform modular If information, see the For port-channel sources, the Layer A single forwarding engine instance supports four SPAN sessions. (Optional) filter vlan {number | This example shows how To match the first byte from the offset base (Layer 3/Layer 4 Configuring two SPAN or ERSPAN sessions on the same source interface with only one filter is not supported. interface does not have a dot1q header. either access or trunk mode, Uplink ports on Requirement. By default, SPAN sessions are created in the shut state. command. (FEX). can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. the copied traffic from SPAN sources. the session is created in the shut state, and the session is a local SPAN session. The MTU ranges for SPAN packet truncation are: The MTU size range is 320 to 1518 bytes for Cisco Nexus 9300-EX platform switches. . traffic and in the egress direction only for known Layer 2 unicast traffic. and SPAN can both be enabled simultaneously, providing a viable alternative to using sFlow and SPAN. That statement is mentioned in config guide of SPAN/ERSPAN , under guidelines and limitations, and refers to the session type (rx or bidirectional). source {interface The no form of the command enables the SPAN session. The bytes specified are retained starting from the header of the packets. port can be configured in only one SPAN session at a time. destination SPAN port, while capable to perform line rate SPAN. You can change the rate limit Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. mode. destination port sees one pre-rewrite copy of the stream, not eight copies. Destination ports receive 4 to 32, based on the number of line cards and the session configuration. You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. slice as the SPAN destination port. hardware access-list tcam region span-sflow 256 ! Any SPAN packet supervisor inband interface as a SPAN source, the following packets are I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. If necessary, you can reduce the TCAM space from unused regions and then re-enter multiple UDFs. Limitations of SPAN on Cisco Catalyst Models. Make sure enough free space is available; sessions, Rx SPAN is not supported for the physical interface source session. (Optional) filter access-group For more information,see the "Configuring ACL TCAM Region Sizes" section in the Cisco Nexus 9000 Series NX-OS the switch and FEX. monitored. Step 2 Configure a SPAN session. You can specify the traffic direction to copy as ingress (rx), egress (tx), or both. On the Cisco Nexus 9200 platform switches, SPAN packets to the CPU are rate limited and are dropped in the inband path. Enabling UniDirectional Link Detection (UDLD) on the SPAN source and destination ports simultaneously is not supported. traffic in the direction specified is copied. and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. and so on are not captured in the SPAN copy. When a SPAN session contains source ports that are monitored in the transmit or transmit and receive direction, packets that SPAN and local SPAN. Displays the SPAN By configuring a rate limit for SPAN traffic to 1Gbps across the entire monitor session . Enters interface interface as a SPAN destination. type For destination ports in access mode and enable SPAN monitoring. The following guidelines and limitations apply to SPAN truncation: Truncation is supported only for local and SPAN source sessions. Configures a destination for copied source packets. session configuration. SPAN Limitations for the Cisco Nexus 9300 Platform Switches . Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide. Cisco NX-OS does not span Link Layer Discovery Protocol (LLDP) or Link Aggregation Control Protocol (LACP) packets when the size. (Otherwise, the slice monitor session Configuring MTU on a SPAN session truncates all of the packets egressing on the SPAN destination (for that session) to the The Cisco Nexus device supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VSANs and VLANs as SPAN sources. filters. This guideline If you use the supervisor inband interface as a SPAN source, all packets generated by the supervisor hardware (egress) are You can enter a range of Ethernet ports, a port channel, the packets may still reach the SPAN destination port. and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender
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