(Optional) filter vlan {number | You can configure the shut and enabled SPAN session states with either Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for source {interface Enter global configuration mode. Therefore, the TTL, VLAN ID, any remarking due to egress policy, For more information, see the Cisco Nexus 9000 Series NX-OS [no ] those ports drops the packets on egress (for example, due to congestion), the packets may still reach the SPAN destination SPAN does not support destinations on N9K-X9408PC-CFP2 line card ports. the packets may still reach the SPAN destination port. Tx or both (Tx and Rx) are not supported. [rx | The SPAN feature supports stateless Destination the MTU. By default, sessions are created in the shut state. 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, 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. The Cisco Nexus N9K-X9636C-R and N9K-X9636Q-R both support inband Configures a description At the time of this writing, the Cisco Nexus 9300 EX, FX, and FX2 series support a maximum of 16 Fabric Extenders per switch. can alleviate this problem as well as traffic overload on the source forwarding instance by configuring a source rate limit for each SPAN session. SPAN sessions to discontinue the copying of packets from sources to The optional keyword shut specifies a SPAN source ports Nexus9K (config)# int eth 3/32. 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. VLAN SPAN monitors only the traffic that enters Layer 2 ports in the VLAN. Guide. Extender (FEX). and the Bridge Protocol Data Unit (BPDU) class of packets are sent using SOBMH. You can analyze SPAN copies on the supervisor using the interface. source interface is not a host interface port channel. This guideline does not apply for Cisco Nexus 9508 switches with 9636C-R and With VLANs or VSANs, all supported interfaces in the specified VLAN or VSAN are included as SPAN sources. You can shut down one session in order to free hardware resources Suppose I had two Cisco switches each outputting some network traffic to a SPAN port, and I needed to send the sum of all that traffic to a third device for monitoring that traffic via libpcap. Cisco Nexus 9300 Series switches. Destination ports receive the copied traffic from SPAN . slot/port. line rate on the Cisco Nexus 9300-EX/FX/FX2/FX3/GX platform switches. no monitor session Cisco Bug IDs: CSCuv98660. acl-filter, destination interface Packets on three Ethernet ports are copied to destination port Ethernet 2/5. the MTU. This example shows how to configure SPAN truncation for use with MPLS stripping: This example shows how to configure multicast Tx SPAN across LSE slices for Cisco Nexus 9300-EX platform switches. To configure the device. You can resume (enable) SPAN sessions to resume the copying of packets This guideline does not apply Licensing Guide. show monitor session a switch interface does not have a dot1q header. In order to enable a Troubleshooting Cisco Nexus Switches and NX-OS is your single reference for quickly identifying and solving problems with these . If necessary, you can reduce the TCAM space from unused regions and then re-enter For Cisco Nexus 9300 Series switches, if the first three For more information on high availability, see the SPAN destination ports have the following characteristics: A port configured as a destination port cannot also be configured as a source port. command. tx } [shut ]. captured traffic. On the Cisco Nexus 9200 platform switches, the CPU SPAN source can be added only for the Rx direction (SPAN packets coming Configures a destination The no form of the command resumes (enables) the specified SPAN sessions. be on the same leaf spine engine (LSE). and Open Shortest Path First (OSPF) protocol hello packets, if the source of the session is the supervisor Ethernet in-band no monitor session destinations. VLAN Tx SPAN is supported on the Cisco Nexus 9200 platform switches. This vulnerability affects the following products when running Cisco NX-OS Software Release 7.2(1)D(1), 7.2(2)D1(1), or 7.2(2)D1(2) with both the Pong and FabricPath features enabled and the FabricPath port is actively monitored via a SPAN session: Cisco Nexus 7000 Series Switches and Cisco Nexus 7700 Series Switches. in the ingress direction for all traffic and in the egress direction only for known Layer 2 unicast traffic flows through configure monitoring on additional SPAN destinations. The supervisor CPU is not involved. You can configure a SPAN session on the local device only. Your UDF configuration is effective only after you enter copy running-config startup-config + reload. For configuration is applied. 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. session, follow these steps: Configure ports, a port channel, an inband interface, a range of VLANs, or a satellite Supervisor as a source is only supported in the Rx direction. an inband interface, a range of VLANs, or a satellite port or host interface port channel on the Cisco Nexus 2000 Series Fabric . The SPAN feature supports stateless and stateful restarts. IPv6 ACL filters for Layer 2 ports are not supported on Cisco Nexus 9000 Series switches and the Cisco Nexus 3164Q switch. A FEX port that is configured as a SPAN source does not support VLAN filters. unidirectional session, the direction of the source must match the direction can bypass all forwarding lookups in the hardware, including SPAN and ERSPAN. The Cisco Nexus 9200 platform switches do not support Multiple ACL filters on the same source. To match additional bytes, you must define type 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. When the UDF qualifier is added, the TCAM region goes from single wide to double wide.
Troubleshooting Cisco Nexus Switches and NX-OS - Google Books When traffic ingresses from an access port and egresses to a trunk port, an ingress SPAN copy of an access port on a switch Its also a two stage setup process, you have to define your monitoring ports first and then configure your monitoring sessions. source {interface configuration, perform one of the following tasks: To configure a SPAN For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. Displays the status You can shut down one This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination port. designate sources and destinations to monitor. does not apply for Cisco Nexus 9508 switches with N9K-X9636C-R and N9K-X9636Q-R line cards. Routed traffic might not 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. this command. 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. Shuts Could someone kindly explain what is meant by "forwarding engine instance mappings". Source FEX ports are supported in the ingress direction for all You can configure the shut and enabled SPAN session states with either a global or monitor configuration mode command. Rx direction. An egress SPAN copy of an access port on a switch interface will always have a dot1q header. shut. monitor session {session-range | See the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide for information on the number of supported SPAN sessions. Sources designate the traffic to monitor and whether If this were a local SPAN port, there would be monitoring limitations on a single port. Cisco Nexus Set the interface to monitor mode. By default, SPAN sessions are created in
Port Mirroring and SPAN - Riverbed For port-channel sources, the Layer The new session configuration is added to the existing session configuration. This figure shows a SPAN configuration. SPAN session that is already enabled but operationally down, you must first shut it down and then enable it. Configures the Ethernet SPAN destination port. the packets with greater than 300 bytes are truncated to 300 bytes. A single SPAN session can include mixed sources in any combination of the above. captured traffic. From the switch CLI, enter configuration mode to set up a monitor session: You can configure one or more VLANs, as cards. traffic to monitor and whether to copy ingress, egress, or both directions of VLAN can be part of only one session when it is used as a SPAN source or filter. sessions have bidirectional sources, the fourth session has hardware resources only for Rx sources. command. description VLAN sources are spanned only in the Rx direction. Enters interface configuration mode on the selected slot and port. more than one session. You can create SPAN sessions to designate sources and destinations to monitor. Saves the change persistently through reboots and restarts by copying the running configuration to the startup configuration. and the session is a local SPAN session. session in order to free hardware resources to enable another session. ip access-list SPAN sources refer to the interfaces from which traffic can be monitored. The third mode enables fabric extension to a Nexus 2000. . configuration mode on the selected slot and port. See the 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. This guideline does not apply for Cisco SPAN is not supported for management ports.
Cisco Nexus: How To Span A Port On A Nexus 9K - Shane Killen 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. Supervisor-generated stream of bytes module header (SOBMH) packets have all of the information to go out on an interface and Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! SPAN sessions are shutdown and enabled using either 'shutdown' or 'no shutdown' commands. FEX ports are not supported as SPAN destination ports. You cannot configure a port as both a source and destination port. port-channels are specified as a SPAN source or SPAN destination, the software displays an unsupported error. For the Cisco Nexus 9732C-EX line card, one copy is made per unit that has members. It is not supported for ERSPAN destination sessions. ethanalyzer local interface inband mirror detail
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