If you have a bit of familiarity Cisco switches you may have configured a SPAN port or a monitor session in the past. Set the interface to monitor mode. You can display the currently active user sessions on the switch using the show users command. A session can have up to eight source ports and one destination port with the same session number. Cisco ThousandEyes End User Monitoring - Certains liens ci-dessous peuvent ouvrir une nouvelle fentre de navigateur pour afficher le document que vous avez slectionn. Enter the IP address of the server your network analyzer is on (Change the IP address): Switch# destination 117.156.45.241. Above you can see that we capture incoming traffic on the Gigabit 2 interface of R1. Cisco 4605 series with a daughter card configured with VLANs . monitor session 1 type erspan-source source interface Po200 no shut destination erspan-id 18 ip address x.x.33.228 origin ip address x.x.x.18. The output shows one line for each interface and displays the following information: Interface number - Gi1/0/1, Te2/0/1, Po1 etc The following excerpts from a Cisco router configuration file offer an example of where to look to enable NetFlow traffic on a Cisco router: Scripts are not supported under any SolarWinds support program or . A very popular scenario for small networks is to have a Cisco ASA 5505 as border firewall connecting the LAN to the Internet. Log into the switch through the CNA interface. I'm currently trying to get the application to work for the Nexus series but there is one command I'm not sure of.. c3750 (config)# monitor session 1 destination interface fastethernet 0/5 The configuration above will capture all traffic of VLAN 5 and send it to SPAN port fastethernet 0/5. Cisco DevNet includes Cisco's products in software-defined networking, security, cloud, data center, internet of things, collaboration, and open-source software development. Step 2: Modify the syslog config for facility codes. rx Monitor ingress packets only. Revert the global configuration mode. One thought on "Cisco IOS Switch Hardening Template" Zhao Beny says: August 24, 2015 at 4:53 pm. There are three types of SPANs supported on Cisco products a. SPAN or local SPAN. Port Fa0/1 will be monitoring traffic sent and received by port Fa0/2 and Fa0/5. Starting Cisco IOS XE Denali 16.1.1 the command is: ASA (config)# snmp-server host [interface_name] [ ip_address] community [community string] Where "interface name" is the ASA interface through which the NMS can be reached, and "ip address" is the NMS address. Step2: Optionally you can also specify access-list to get exact packet capture that will limit capture to desire traffic. Port mirroring is a very valuable troubleshooting tool. Follow these steps to get SPAN active on the switch. Rohan(config-if)#port monitor vlan80. Related Resources . By providing quick, authoritative example-rich references to the commands most frequently used to configure and troubleshoot IOS-XR-based routers, this book will help you successfully design, implement, or support network containing . The first step is to name the flow exporter: Switch# flow exporter Comparitechexport. . Hopefully this resolves your issue. If it returns none for capabilities, then the monitoring is off. The configuration is pretty straight-forward so let me give you some examples SPAN Configuration Let's start with a simple configuration. . Scenario 1: Multiple VLANs configured. This configuration example is valid for most of the Dell and Cisco switches for example. ASA (config)#ntp trusted-key 1. ASA (config)#ntp server 192.168.1.11 key 1 source inside prefer. The default gateway is set to the address of the provider and inside hosts can reach the internet. Click on the port that you want to connect the packet sniffer to and select the Modify option. a walkthrough. Scenarios. There's also live online events, interactive content, certification prep materials, and more. Cisco's NX-OS platform does it a little differently than traditional IOS, so I wanted to briefly post a walkthrough. Use the command show monitor session 1 to verify your configuration. R1# monitor capture point ip cef CPoint-FE0 FastEthernet 0 both IPv4 CEF is not enabled R1# config t Enter configuration commands, one per line. l2tp on cisco router. This will display a graphic representing the port array of the switch. This should give you an idea of what SPAN / RSPAN are capable of. Enter interface configuration mode for the specified Ethernet interface selected by the port values. Troubleshooting. Note: The VLAN and Interface IDs in the configuration provided below are only examples to assist in visualising what's required. Documentation d'assistance . Range of addresses for remote users. Characteristics of the Source Port A source port, also called a monitored port, is a switched or routed port that you monitor for network traffic analysis. (Example Cisco CLI commands) monitor session 10 source remote vlan 400; The output shows one line for each interface and displays the following information: Interface number - Gi1/0/1, Te2/0/1, Po1 etc In these examples, I am using a Cisco 2900 series layer 2 switch. <cr> Press Enter to execute the command. The Outside interfaces on ASAs are Ge0/0 and LAN interfaces are Ge0/1. It will also monitor traffic to and from the management interface VLAN 1. Cisco Flexible NetFlow configuration ; Examples of Flexible NetFlow Configuration; Video Transcription . Switch1# configure terminal Switch1 (config)# monitor session 1 source interface fastEthernet0/2 Switch1 (config)# monitor session 1 destination interface fastEthernet0/24 Switch1 (config)#end Step 1. Our source port is Fast Ethernet 0/2 on Switch 1. Restrictions for Configuring ERSPAN Open a monitor session. Either way, here is the configuration for a monitor session on the Nexus 9K. The above example identifies three sources: While experimenting and learning how routing protocols, VLANs, and spanning-trees work can keep a network engineer busy for hours, at some point you are probably going to want to see some traffic from clients on your network. Select the Smartports option in the CNA menu. However, the preparation of firewall devices to . You can accomplish this with multiple "monitor session 1 source vlan" config lines. Here are the basic commands you require to capture traffic on PortChannel 200 interface goes to my WLC. Here are some redirects to popular content migrated from DocWiki. Get full access to Cisco IOS in a Nutshell, 2nd Edition and 60K+ other titles, with free 10-day trial of O'Reilly. For Failover we will use Ge0/2, particularly Ge0/2.1 will be the Failover interface and Ge0/2.2 the state interface (by which the information about protocol States will be exchanged). Using the incorrect logging . . End with CNTL/Z. Port Fa0/1 will be monitoring traffic sent and received by port Fa0/2 and Fa0/5. Server (config)#interface virtual-template 1 Server (config-if)#ip address 192.168.12.2 255.255.255. Click on the port that you want to connect the packet sniffer to and select the Modify option. A source port cannot be a destination port. ip flow monitor Scrut_mon_output output. Cisco NetFlow configuration. Example 3-17. First, you have to set up the monitor session and configure source and destination interfaces . The IP address 192.168..1 / 24 is set on the internal interface. Discover code repositories related to Cisco technologies. Example 2-3 illustrates the filtering configuration on the SPAN session and verification using the show monitor session command. To create a SPAN source session to monitor the traffic that is bridged into a source VLAN, use the monitor session session_number source vlan vlan-id command. Displays status and number of packets that are sent to and received from all AAA servers: show aaa servers. This will display a graphic representing the port array of the switch. R1#conf t Enter configuration commands, one per line. Example Configuration for B5/C5 SecureStack hardware. With above configuration, you should be able to see PortChannel 200 traffic on your PC running . Log into the switch through the CNA interface. To configure the device. Here's the configuration of R2: R2 (config)#monitor session 1 type erspan-destination R2 (config-mon-erspan-dst)#no shutdown R2 (config-mon-erspan . Follow these steps to get SPAN active on the switch. Configure the interface that you want to export packets with: Switch# destination source gigabitEthernet 0/1. To filter the relevant traffic, an access control list (ACL) is created, to be referenced in the SPAN session configuration by using the filter access-group acl command. Nexus9K (config-monitor)# exit. This landing page will be removed . Documenting ASDM usage with its uncountable configuration and monitoring screens is beyond the scope of this book. Command: show interfaces status. The Cisco DocWiki platform was retired on January 25, 2019. The Cisco ERSPAN feature allows you to monitor traffic on ports or VLANs and send the monitored traffic to destination ports. Monitoring and Maintaining System Message Logs Configuration Examples for System Message Logs Additional References for System Message Logs Feature History and Information For System Message Logs Finding Feature Information Your software release may not support all the features documented in this module. This configuration example successfully exports flows from a Cisco 4507 with Supervisor 7: Scripts are not supported under any SolarWinds support program or service. The command output lists all active console port and Telnet sessions on the switch. . SSH Configuration . Port mirroring enables a network administrator to monitor the performance of the network and to take corrective actions when appropriate. When you are removing a port from a SPAN session, you would use the following example command no monitor session 1 interface fastethernet 0/2, but I'm unsure if that command works on the Nexus . Technical Cisco content is now found at Cisco Community, Cisco.com, and Cisco DevNet. The SPAN destination must use the same session number. Note: In R3's configuration, we've configured a static IP address on its WAN interface FastEthernet0/1, but for the sake of this example, let us assume it was dynamically provided by the ISP. SPAN is used for troubleshooting connectivity issues and calculating network utilization and performance, among many others. For example, on Cisco switches, this feature is known as Switched Port Analyzer (SPAN). Example 3-15 also displays a sample Telnet session coming from address 192.168.1.201. Scenario 2: No VLANs/Default Cisco VLAN 1 configured. As I explained in the previous article, facility codes are just a way of separating messages from different types of devices and services. Configuring and Verifying Telnet Access . Displays entries in the ip device tracking table: show ip device tracking all. By default, a switch sends the output from system messages and debug privileged EXEC commands to a logging process. Lines 1-2 above dictate that we should be using authentication with NTP for added security and gives a key to use. Such a request could be to allow Remote Desktop (RDP) access from the Internet to an internal . show monitor session remote show monitor session local . . Cisco Flexible NetFlow configuration. Configuration Example In this example, two concurrent SPAN sessions are created. b. First, you have to set up the monitor session and configure source and destination interfaces . R2(config)#interface serial 0/0 R2(config-if)#shutdown R2(config-if)#no shutdown When you enter the terminal monitor. Remote SPAN (RSPAN). If you want to monitor single ports: port monitor Such as: Rohan(config-if)#port monitor fa0/1 Line 3 is required to advise the ASA that this key is trusted. Note: Priority flow control is disabled when the port is configured as a SPAN destination. Configuration example: ! End with CNTL/Z. Cisco's NX-OS platform does it a little differently than traditional IOS, so I wanted to briefly post a walkthrough. Cisco SD-WAN documentation is now accessible via the Cisco Product Support portal. . Switch(config-vlan)# ip flow monitor cascade-monitor input Configuring NetFlow Export for Cisco Nexus 1000V Configuring NetFlow export of the Cisco 1000V is similar to the physical Nexus switches running NX-OS (for example, Cisco Nexus 7000), with some variation in commands. Then you can see the log of the interface status. The following configuration enables sFlow monitoring of all interfaces on a Juniper EX3200 switch, sampling packets at 1-in-500, polling counters every 30 seconds and sending the sFlow to an analyzer (10.0.0.50) on UDP . It will also monitor traffic to and from the management interface VLAN 1. Explore repos. a walkthrough. With Cisco NX-OS, you can send log messages to monitor . I revised the configuration example to be correct now and provided some sample outputs to verify the operation, with a config example for the remote side also. show flow exporter [exporter-name] example: show flow exporter Scrutinizer SPAN on the Catalyst 4500/4000 and Catalyst 6500/6000 Series Switches That Run Cisco IOS System Software Configuration Example Feature Summary and Limitations Performance Impact of SPAN on the Different Catalyst Platforms Catalyst 2900XL/3500XL Series Architecture Overview Performance Impact Catalyst 4500/4000 Series Architecture Overview This switch is based on Cisco's programmable ASIC named Unified Access Data Plane (UADP) which supports the convergence as well as allows for deployment of SDN and Cisco ONE (Cisco's version . Focus: Cisco SPAN . button. Example 1-4 NX-OS BGP Configuration NX-OS router bgp 65100 address-family ipv4 unicast neighbor 10.1.12.2 remote-as 65100 address-family ipv4 unicast Verification of BGP Sessions. Before moving to the configuration let's discuss the important terminology and details which will be used in the configuration. Example 1-5 displays the IPv4 BGP unicast summary. Purpose. The monitor span session NAME on the interface did not match the globally defined span monitor session name. Session ID: Session ID must match the session IDs of the source ports added in the next section Port mirroring is a very valuable troubleshooting tool. Dell 2000 Series, Dell N4000 Series, Dell N8000 Series, Cisco 2960, Cisco 3650, Cisco 3850 etc. Cisco : SPAN ( Switched Port Analyzer) SPANPortPort ,. Here, RSPAN Source Port is the port which is the port that will be mirrored and analyzed. Very helpful. Click the Add. Select the Smartports option in the CNA menu. Nexus9K (config)# monitor session 1. monitor session 1 source vlan 100 - 1000. monitor session 1 destination interface Gi1/0/13! We use ERSPAN ID 100, the source IP address will be 172.16.12.1 and the destination is 172.16.2.200 (Wireshark). For 'Cisco SD-WAN Configuration Guide for Cisco IOS XE SD-WAN Release 16.9.x and Cisco SDWAN Release 18.3.x' content, see Configuring Traffic Flow Monitoring on IOS XE Routers. R1(config)# ip cef R1(config)# exit R1# monitor capture point ip cef CPoint-FE0 FastEthernet 0 both *May 25 14:54:40.383: %BUFCAP-6-CREATE: Capture Point CPoint-FE0 created. Switch(config)# monitor session 1 source interface gi0/11 tx Switch(config)# monitor session 1 source vlan 100 both The command syntax begins monitor session, and assigns it a session number. Please refer to the "RSPAN Deployment" diagram for the switch connectivity details. In this example configuration, if a TCP packet destined for 192.168.1.1 on port 22 is fragmented in transit, the initial fragment is dropped as expected by the second access control entry based on the Layer 4 information within the packet. . Configuration Example In this example, two concurrent SPAN sessions are created. End with CNTL/Z. Otherwise, you can find yourself completely inundated with . Monitor sessionA designation for a collection of traffic mirroring configurations consisting of a single destination and, potentially, many source interfaces. Cisco 6509 switch configuration 2 posts . Prerequisites for Configuring ERSPAN Access control list (ACL) filter is applied before sending the monitored traffic on to the tunnel. Source Port and Destination VLAN Config (on source switch) Source Port and Destination VLAN Configuration is done on the source switch (Switch 1). A stack member that generates a system message appends its hostname in the form of hostname-n, where n is a switch range from 1 to 8, and redirects the output to the logging process on the stack master. Let's consider an example of active/standby Failover configuration (see diagram below). (DTI SWITCH) #config (DTI SWITCH) (Config)# monitor session 1 mode (DTI SWITCH) (Config)#monitor session 1 source interface 0/7 ? The port used for NetFlow traffic is specified in the configuration of your flowenabled Cisco appliance. About. Today, I want to focus on the SPAN session . example: Core-6509#configure terminal Core-6509(config)#monitor session 1 source interface GigabitEthernet 9/33 Core-6509(config)#monitor session 1 . let us edit our configuration to also monitor traffic ingress Fa1/1. This example shows how to set up a SPAN session (session 1) for monitoring source port traffic to a destination port. These sections contain this conceptual information: Local SPAN Remote SPAN SPAN and RSPAN Concepts and Terminology no monitor session 1 monitor session 1 source interface Fa1/2 monitor session 1 destination interface Fa1/3 . NOTE Exemples et notes techniques de configuration. This is where we configure the IP address for the server and we also have to set the MTU here. Any currently configured destinations are displayed. Thanks a lot. SPAN Session Creating a Bridging Loop? ASA (config)#ntp authentication-key 1 md5 fred. A basic span port is very useful in capturing packets or passively monitoring and is a requirement for some web filtering services such as Websense. When the Add Session Destination window appears, complete the information as shown here in our example. Your results may vary, but I know these are correct for the 2900 series. This video will show you how to configure a Cisco router to export NetFlow data using NetFlow version 9, also known as Flexible NetFlow.. Configuring port mirroring is a way to monitor network traffic by sending a copy of packets entering or exiting a port (or VLAN) on a switch to a local or remote destination for monitoring. It is now time to verify the DMVPNs are working correctly. Description: This command is useful for quickly displaying the current status of all the interfaces on the switch.