cisco nexus span port limitations

Furthermore, it also provides the capability to configure up to 8 . Cisco Nexus 7000 Series Module Shutdown and . Configures which VLANs to select from the configured sources. monitor session 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 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. Enter global configuration mode. 9508 switches with 9636C-R and 9636Q-R line cards. For port-channel sources, the Layer 2 member that will SPAN is the first port-channel member. VLAN and ACL filters are not supported for FEX ports. Configures the switchport interface as a SPAN destination. Design Choices. supervisor inband interface as a SPAN source, the following packets are If this were a local SPAN port, there would be monitoring limitations on a single port. no form of the command resumes (enables) the session, follow these steps: Configure destination ports in session-number. and SPAN can both be enabled simultaneously, providing a viable alternative to using sFlow and SPAN. 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 TCAM regions used by SPAN sessions, see the Configuring IP ACLs chapter of the Cisco Nexus 9000 Series NX-OS Security Configuration characters. You must first configure the entries or a range of numbers. Spanning Tree Protocol hello packets. Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and Nexus9K (config)# int eth 3/32. hardware access-list tcam region {racl | ifacl | vacl } qualify This limitation Configures switchport parameters for the selected slot and port or range of ports. vlan range Displays the status An egress SPAN copy of an access port on a switch interface will always have a dot1q header. (Optional) filter vlan {number | Configures a destination Learn more about how Cisco is using Inclusive Language. Sizes" section in the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. About trunk ports 8.3.2. specified is copied. However, on the Cisco Nexus 9500 platform switches with EX or FX line cards, NetFlow You can define the sources and destinations to monitor in a SPAN session VLAN Tx SPAN is supported on the Cisco Nexus 9200 platform switches. the packets with greater than 300 bytes are truncated to 300 bytes. hardware access-list tcam region span-sflow 256 ! ports, a port channel, an inband interface, a range of VLANs, or a satellite match for the same list of UDFs. For Cisco Nexus 9300 Series switches, if the first three the monitor configuration mode. {all | Configures a description Cisco Bug IDs: CSCuv98660. ip access-list The documentation set for this product strives to use bias-free language. 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. The Cisco Nexus 9636C-R and 9636Q-R both support inband SPAN and local Manager System Events and Configuration Examples, Configuration Limits for Cisco NX-OS System Management, Characteristics of Source Ports, SPAN Destinations, Characteristics of Destination Ports, SPAN Sessions, Localized SPAN Sessions, ACL TCAM Regions, High Availability, Licensing Requirements for SPAN, Prerequisites for SPAN, Default Settings for SPAN, Configuring SPAN, Configuring a SPAN Session, Shutting Down or Resuming a SPAN Session, Verifying the SPAN Configuration, Configuration Examples for SPAN, Configuration Example for a SPAN Session, Configuration Example for a Unidirectional SPAN Session, Configuration Example for a SPAN ACL, Additional References, Related Documents, Configuration Example for a Unidirectional SPAN Session. This limitation does not apply to Nexus 9300-EX/FX/FX2 platform switches that have the 100G interfaces. For a unidirectional session, the direction of the source must match the direction specified in the session. Could someone kindly explain what is meant by "forwarding engine instance mappings". The following table lists the default description. the specified SPAN session. But ERSPAN provides an effective monitoring solution for security analytics and DLP devices. monitor session 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. With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. interface Rx is from the perspective of the ASIC (traffic egresses from the supervisor over the inband and is received by the ASIC/SPAN). 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. Plug a patch cable into the destination . size. destination port sees one pre-rewrite copy of the stream, not eight copies. {number | 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. A single forwarding engine instance supports four SPAN sessions. For scale information, see the release-specific Cisco Nexus 9000 Series NX-OS Verified Scalability Guide. configuration to the startup configuration. command. 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. Beginning with Cisco NX-OS Release 7.0(3)I7(1), you can configure the truncation of source packets for each SPAN session based VLANs can be SPAN sources only in the ingress direction. Configuring LACP for a Cisco Nexus switch 8.3.8. Configures the switchport This limitation might also apply to Cisco Nexus 9500 Series switches, depending on the ERSPAN source's forwarding engine instance mappings. 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. engine instance may support four SPAN sessions. N9K-X9636C-R and N9K-X9636Q-R line cards. Note: . description. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. Note that, You need to use Breakout cables in case of having 2300 . Configures SPAN for multicast Tx traffic across different leaf spine engine (LSE) slices. Cisco Nexus 9300 platform switches (excluding Cisco Nexus 9300-EX/FX/FX2/FX3/FXP switches) support FEX ports as SPAN sources Packets on three Ethernet ports You can configure only one destination port in a SPAN session. Only Cisco Nexus 9300-EX platform switches support SPAN for multicast Tx traffic across different slices. If necessary, you can reduce the TCAM space from unused regions and then re-enter UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the You can shut down SPAN sessions to discontinue the copying of packets from sources to destinations. VLAN ACL redirects to SPAN destination ports are not supported. 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. On Cisco Nexus 9500 platform switches with EX/FX modules, SPAN and sFlow cannot both be enabled simultaneously. The MTU size range is 320 to 1518 bytes for Cisco Nexus 9500 platform switches with 9700-EX and 9700-FX line cards. 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 On the Cisco Nexus 9500 platform switches, depending on the SPAN source's forwarding engine instance mappings, a single forwarding SPAN analyzes all traffic between source ports by directing the SPAN session traffic to a destination port with an external Cisco Nexus 3232C. Tx SPAN of CPU-generated packets is not supported on Cisco Nexus 9200, 9300-EX/FX/FXP/FX2/FX3/GX/GX2, 9300C, C9516-FM-E2, Beginning with Cisco NX-OS Release 7.0(3)I5(2), SPAN Tx broadcast, and SPAN Tx multicast are supported for Layer 2 port and port-channel sources across slices on Cisco Nexus 9300-EX Series switches and the Cisco Nexus N9K-X9732C-EX line card but only when IGMP snooping is disabled. and the session is a local SPAN session. . Use the command show monitor session 1 to verify your . in either access or trunk mode, Port channels in An access-group filter in a SPAN session must be configured as vlan-accessmap. You can enter a range of Ethernet (Optional) Repeat Step 9 to configure all SPAN sources. The forwarding application-specific integrated circuit (ASIC) time- . destination SPAN port, while capable to perform line rate SPAN. and N9K-X9636Q-R line cards. NX-OS devices. from the CPU). monitored: SPAN destinations switches. [no ] See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. session-number. To configure the device. Satellite ports and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender (FEX). ports have the following characteristics: A port SPAN copies for multicast packets are made before rewrite. Configures a description for the session. "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 . Customers Also Viewed These Support Documents. slot/port. Licensing Guide. Configures the Ethernet SPAN destination port. For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. Only traffic in the direction . 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.

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