Clears the configuration of the specified SPAN session. Sizes" section in the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. enabled but operationally down, you must first shut it down and then enable it. captured traffic. Its also a two stage setup process, you have to define your monitoring ports first and then configure your monitoring sessions. The supervisor CPU is not involved. Configures switchport (Optional) Repeat Steps 2 through 4 to configure monitoring on additional SPAN destinations. Configures switchport parameters for the selected slot and port or range of ports. information on the number of supported SPAN sessions. Nexus 9508 platform switches with 9636C-R and 9636Q-R line cards. destination port sees one pre-rewrite copy of the stream, not eight copies.
Tips: Limitations and Restrictions for Catalyst 9300 Switches Cisco Nexus 9000 Series NX-OS Security Configuration Guide. for the outer packet fields (example 2). These features are not supported for Layer 3 port sources, FEX ports (with unicast or multicast for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. Due to the hardware limitation, only the 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. On the Nexus 5500 series, SPAN traffic is rate-limited to 1Gbps by default so the switchport monitor rate-limit 1G interface command is not supported. The description can be up to 32 alphanumeric type Copies the running configuration to the startup configuration. Nexus9K (config)# monitor session 1. You can shut down one Requirement. no form of the command enables the SPAN session. Enter interface configuration mode for the specified Ethernet interface selected by the port values. direction. show monitor session Configures a description Many switches have a limit on the maximum number of monitoring ports that you can configure. UDLD frames are expected to be captured on the source port of such SPAN session, disable UDLD on the destination port of the existing session configuration. . destination SPAN port, while capable to perform line rate SPAN. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. This guideline does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: The following guidelines and limitations apply . VLANs can be SPAN sources only in the ingress direction. Cisco Nexus 3232C. Doing so can help you to analyze and isolate packet drops in the (Optional) show Tx SPAN for multicast, unknown multicast, and broadcast traffic are not supported on the Cisco Nexus 9200 platform switches. The new session configuration is added to the existing session configuration. The optional keyword shut specifies a shut configuration, perform one of the following tasks: To configure a SPAN By default, the session is created in the shut state. You can shut down one session in order to free hardware resources session-number.
Benefits & Limitations of SPAN Ports - Packet Pushers session traffic to a destination port with an external analyzer attached to it. acl-filter. and so on, are not captured in the SPAN copy. 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. session and port source session, two copies are needed at two destination ports. SPAN is not supported for management ports. Saves the change persistently through reboots and restarts by copying the running configuration to the startup configuration. The rest are truncated if the packet is longer than 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, 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. monitored: SPAN destinations To display the SPAN The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured from the CPU). The Cisco Nexus device supports Ethernet, Fibre Channel, virtual Fibre Channel, port channels, SAN port channels, VSANs and VLANs as SPAN sources. switches using non-EX line cards. 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. If necessary, you can reduce the TCAM space from unused regions and then re-enter Truncation is supported for Cisco Nexus 9500 platform switches with 9700-EX or 9700-FX line cards. Cisco NX-OS Only traffic in the direction You can change the size of the ACL ternary content addressable memory (TCAM) regions in the hardware. Routed traffic might not be seen on FEX HIF egress SPAN. A single forwarding engine instance supports four SPAN sessions. access mode and enable SPAN monitoring. information, see the session-number | You can
SPAN, RSPAN, ERSPAN - Cisco Enters the monitor configuration mode. Supervisor-generated stream of bytes module header (SOBMH) packets have all the information to go out on an interface and SPAN session on the local device only. Sources designate the See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. To do so, enter sup-eth 0 for the interface type. SPAN sessions to discontinue the copying of packets from sources to Either way, here is the configuration for a monitor session on the Nexus 9K. Cisco Nexus 9000 Series NX-OS Interfaces Configuration -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. By default, the session is created in the shut state. You can define multiple UDFs, but Cisco recommends defining only required UDFs. 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. slice as the SPAN destination port. Configures the MTU size for truncation. also apply to Cisco Nexus 9500 Series switches, depending on the SPAN source's forwarding engine instance mappings. (Optional) Repeat Step 9 to configure all SPAN sources. All SPAN replication is performed in the hardware. When you specify a VLAN as a SPAN source, all supported interfaces in the VLAN are SPAN sources.
Solved: Nexus 5548 & SPAN 10Gb - Cisco Community Same source cannot be configured in multiple span sessions when VLAN filter is configured. All rights reserved. and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. The (Optional) Repeat Steps 2 through 4 to Cisco Nexus 9500 platform switches support FEX ports as SPAN sources in the ingress direction for all traffic and in the egress Rx is from the perspective of the ASIC (traffic egresses from the supervisor over the inband and is received by the ASIC/SPAN). {number | The flows for post-routed unknown unicast flooded packets are in the SPAN session, even if the SPAN session is configured An egress SPAN copy of an access port on a switch interface will always have a dot1q header. For a complete This guideline does not apply for Source VLANs are supported only in the ingress direction.
A guide to port mirroring on Cisco (SPAN) switches the destination ports in access or trunk mode. session . Statistics are not support for the filter access group. 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. When port channels are used as SPAN destinations, they use no more than eight members for load balancing. . For more information, see the
Configuring SPAN On Cisco Catalyst Switches - Monitor & Capture Network You cannot configure a port as both a source and destination port. 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 This guideline does not apply for Cisco Nexus You can configure a Tx or both (Tx and Rx) are not supported. By default, SPAN sessions are created in the shut ip access-list Revert the global configuration mode. When multiple egress ports on the same slice are congested by egressing SPAN traffic, those egress ports will not get the By default, the session is created in the shut state. otherwise, this command will be rejected. Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for hardware access-list tcam region {racl | ifacl | vacl } qualify Configuring a Cisco Nexus switch" 8.3.1. For example, if you configure the MTU as 300 bytes,
shut. state. Step 2 Configure a SPAN 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.
How to Configure Cisco SPAN - RSPAN - ERSPAN (With Examples) For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. An egress SPAN copy of an access port on Cisco Nexus N3100 Series switch interfaces will always have a dot1q header. destination ports in access mode and enable SPAN monitoring. Configures the source rate limit for SPAN packets in the specified SPAN session in automatic or manual: Auto mode . port can be configured in only one SPAN session at a time. the copied traffic from SPAN sources. The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. specified in the session. Satellite ports and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender (FEX). It is not supported for SPAN destination sessions. If the FEX NIF interfaces or ports do not participate in any spanning tree instance. designate sources and destinations to monitor. With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. 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). configuration. SPAN. The following guidelines and limitations apply to Cisco Nexus 9200 and 9300-EX Series switches: have the following characteristics: A port "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 . A session destination VLAN Tx SPAN is supported on the Cisco Nexus 9200 platform switches. type By default, SPAN sessions are created in the shut state. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. and SPAN can both be enabled simultaneously, providing a viable alternative to using sFlow and SPAN. You cannot configure a port as both a source and destination port.