Basic RSPAN configuration Click the Add. The above example identifies three sources: . I will use the example I showed you earlier: example: Core-6509#configure terminal Core-6509(config)#monitor session 1 source interface GigabitEthernet 9/33 Core-6509(config)#monitor session 1 . About. Here, RSPAN Source Port is the port which is the port that will be mirrored and analyzed. 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. The Cisco DocWiki platform was retired on January 25, 2019. Restrictions for Configuring ERSPAN The first step is to name the flow exporter: Switch# flow exporter Comparitechexport. Otherwise, you can find yourself completely inundated with . Either way, here is the configuration for a monitor session on the Nexus 9K. . Discover code repositories related to Cisco technologies. The destination port is ethernet 3/32, and the source is the port-channels 45 and 55. Port mirroring enables a network administrator to monitor the performance of the network and to take corrective actions when appropriate. Your results may vary, but I know these are correct for the 2900 series. Step2: Identify the NMS host that can connect to the ASA for SNMP management. let us edit our configuration to also monitor traffic ingress Fa1/1. 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. To configure the device. Nexus9K (config-monitor)# exit. Range of addresses for remote users. 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. Follow these steps to get SPAN active on the switch. Nexus9K (config)# int eth 3/32. Thanks a lot. Example 3-15 also displays a sample Telnet session coming from address 192.168.1.201. This means there will be some redundant packets but . 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). Cisco : SPAN ( Switched Port Analyzer) SPANPortPort ,. If you have a bit of familiarity Cisco switches you may have configured a SPAN port or a monitor session in the past. Port Fa0/1 will be monitoring traffic sent and received by port Fa0/2 and Fa0/5. Cisco 6509 switch configuration 2 posts . NOTE This configuration example is valid for most of the Dell and Cisco switches for example. In these examples, I am using a Cisco 2900 series layer 2 switch. show monitor session remote show monitor session local . The hostname of the switch is Rohan. Click on the Session Destinations link under the SPAN & RSPAN menu. Configuring and Verifying Telnet Access . This should give you an idea of what SPAN / RSPAN are capable of. 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 Prerequisites for Configuring ERSPAN Access control list (ACL) filter is applied before sending the monitored traffic on to the tunnel. 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 . Only supports Type-II ERSPAN header. Revert the global configuration mode. . Depending on the Cisco device you are using, there may be additional steps required to successfully collect ingress and egress . As I explained in the previous article, facility codes are just a way of separating messages from different types of devices and services. The Outside interfaces on ASAs are Ge0/0 and LAN interfaces are Ge0/1. To disable it, use the terminal no monitor command. Example 3-15. Cisco's NX-OS platform does it a little differently than traditional IOS, so I wanted to briefly post a walkthrough. Description: This command is useful for quickly displaying the current status of all the interfaces on the switch. for an example on how this can happen. Step2: Optionally you can also specify access-list to get exact packet capture that will limit capture to desire traffic. button. Then you can see the log of the interface status. Get full access to Cisco IOS in a Nutshell, 2nd Edition and 60K+ other titles, with free 10-day trial of O'Reilly. ip flow monitor Scrut_mon_output output. Configuring Local SPAN: Local SPAN configures using "monitor session" command specifying source and destination on the same switch. show monitor session remote show monitor session local . Show commands. Lines 1-2 above dictate that we should be using authentication with NTP for added security and gives a key to use. 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. Cisco Flexible NetFlow configuration ; Examples of Flexible NetFlow Configuration; Video Transcription . 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. . Reason #2: Raspberry Pi network clients. To determine whether you've enabled monitoring, use the show terminal command, and look for the following: Capabilities: Receives Logging Output. monitor session 1 source vlan 100 - 1000. monitor session 1 destination interface Gi1/0/13! Today, I want to focus on the SPAN session . Command: show interfaces status. rx Monitor ingress packets only. Catalyst-3550 (config)# monitor session 1 destination interface fastethernet 0/24 After entering both commands, we noticed our destination's SPAN port LED ( FE0/24) began flashing in synchronisation with that of FE0/1's LED - an expected behaviour considering all FE0/1 packets were being copied to FE0/24. It will also monitor traffic to and from the management interface VLAN 1. I'm currently trying to get the application to work for the Nexus series but there is one command I'm not sure of.. Focus: Cisco SPAN . b. This completes the DMVPN configuration on our central hub and two spoke routers. R1#conf t Enter configuration commands, one per line. Cisco calls this SPAN, and it's pretty easy to do. The output shows one line for each interface and displays the following information: Interface number - Gi1/0/1, Te2/0/1, Po1 etc First, you have to set up the monitor session and configure source and destination interfaces . Rohan(config-if)#port monitor vlan80. This video will show you how to configure a Cisco router to export NetFlow data using NetFlow version 9, also known as Flexible NetFlow.. access-session template monitor 10. Step 1. This is just for configuration example . So, I have built a tool that allows users to configure SPAN sessions on a Cisco switch. Log into the switch through the CNA interface. For example, on Cisco switches, this feature is known as Switched Port Analyzer (SPAN). Note: The VLAN and Interface IDs in the configuration provided below are only examples to assist in visualising what's required. One thought on "Cisco IOS Switch Hardening Template" Zhao Beny says: August 24, 2015 at 4:53 pm. Scripts are provided . Remote SPAN (RSPAN). If it returns none for capabilities, then the monitoring is off. By default, Cisco devices use a syslog facility code of "local7" for all of their messages. For example, if you connect a Cisco Intrusion Detection System (IDS) sensor appliance to a destination port, the IDS device can send TCP reset packets to close down the TCP session of a suspected attacker. Displays 802.1x status for all interfaces: show dot1x all. Cisco ThousandEyes End User Monitoring - Certains liens ci-dessous peuvent ouvrir une nouvelle fentre de navigateur pour afficher le document que vous avez slectionn. Set the interface to monitor mode. Server (config)#interface virtual-template 1 Server (config-if)#ip address 192.168.12.2 255.255.255. Line 3 is required to advise the ASA that this key is trusted. l2tp on cisco router. 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. Documenting ASDM usage with its uncountable configuration and monitoring screens is beyond the scope of this book. Cisco 4605 series with a daughter card configured with VLANs . Troubleshooting. 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 . . Do Not Log to Console or Monitor Sessions. Please see my example below: lab1 (config)#monitor session 1 source vlan 2 , 4 , 6 , 8 , 10 lab1 (config)#monitor session 1 source vlan 12 , 14 , 16 , 18 , 20 lab1 (config)#do show run | i monitor monitor session 1 source vlan 2 , 4 , 6 , 8 , 10 Select the Smartports option in the CNA menu. This example shows how to set up a SPAN session (session 1) for monitoring source port traffic to a destination port. Source Port and Destination VLAN Config (on source switch) Source Port and Destination VLAN Configuration is done on the source switch (Switch 1). 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. A source port cannot be a destination port. It will also monitor traffic to and from the management interface VLAN 1. You must specify the address range that will be assigned to remote L2TP clients. There are three types of SPANs supported on Cisco products a. SPAN or local SPAN. Scenarios. The default gateway is set to the address of the provider and inside hosts can reach the internet. (Example Cisco CLI commands) monitor session 10 source remote vlan 400; Port Fa0/1 will be monitoring traffic sent and received by port Fa0/2 and Fa0/5. . Technical Cisco content is now found at Cisco Community, Cisco.com, and Cisco DevNet. 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. 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. This landing page will be removed . 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. Cisco DevNet is Cisco's developer program to help developers and IT professionals who want to write applications and develop integrations with Cisco products, platforms, and APIs. This is sometimes referred to as session monitoring. a walkthrough. 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 . . Log into the switch through the CNA interface. If you want to monitor single ports: port monitor Such as: Rohan(config-if)#port monitor fa0/1 It is now time to verify the DMVPNs are working correctly. Exporting flows on some Cisco devices (for example, the 4500 series, with Supervisor 7) requires using Flexible NetFlow. 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. ASA (config)#ntp server 192.168.1.11 key 1 source inside prefer. To verify that the correct information was entered for each of the Flexible NetFlow configuration steps, the following commands can be run on the Catalyst 3850. show flow record [record-name] example: show flow record FNF. flow-export destination inside 1.1.1.1 2055 flow-export template timeout-rate 1 flow-export delay flow-create 60 access-list netflow-export extended permit ip any any class-map netflow-export-class match access-list netflow-export policy-map global_policy class netflow-export-class flow-export event-type all destination . 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. To display the active user sessions on the switch, enter this command: Command. Any currently configured destinations are displayed. Here are the basic commands you require to capture traffic on PortChannel 200 interface goes to my WLC. Let's consider an example of active/standby Failover configuration (see diagram below). tx Monitor egress packets only. R2(config)#interface serial 0/0 R2(config-if)#shutdown R2(config-if)#no shutdown When you enter the terminal monitor. Step 2: Modify the syslog config for facility codes. Configuration Example In this example, two concurrent SPAN sessions are created. We use ERSPAN ID 100, the source IP address will be 172.16.12.1 and the destination is 172.16.2.200 (Wireshark). Enter global configuration mode. Session ID: Session ID must match the session IDs of the source ports added in the next section Here are some redirects to popular content migrated from DocWiki. Cisco SD-WAN documentation is now accessible via the Cisco Product Support portal. Description: This command is useful for quickly displaying the current status of all the interfaces on the switch. Ces documents sont hbergs sur le site amricain et ne sont disponibles qu'en anglais. End with CNTL/Z. Nexus9K (config)# monitor session 1. Configuration example: ! Example 3-17. 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. Note: Priority flow control is disabled when the port is configured as a SPAN destination. The output shows one line for each interface and displays the following information: Interface number - Gi1/0/1, Te2/0/1, Po1 etc First, any existing SPAN configuration for session 1 is cleared and then bidirectional traffic is mirrored from source port 1 to destination port 10: Switch (config)# no monitor session 1 Dell 2000 Series, Dell N4000 Series, Dell N8000 Series, Cisco 2960, Cisco 3650, Cisco 3850 etc. Monitor sessionA designation for a collection of traffic mirroring configurations consisting of a single destination and, potentially, many source interfaces. Cisco Flexible NetFlow configuration. Cisco DevNet includes Cisco's products in software-defined networking, security, cloud, data center, internet of things, collaboration, and open-source software development. The BGP session is verified with the command show bgp afi safi summary on IOS, IOS XR, and NX-OS devices. This is where we configure the IP address for the server and we also have to set the MTU here. 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. Scenario 2: No VLANs/Default Cisco VLAN 1 configured. If you see this, you're monitoring logging output. Port mirroring is a very valuable troubleshooting tool. Our source port is Fast Ethernet 0/2 on Switch 1. In the above example, the session number is 1. You can accomplish this with multiple "monitor session 1 source vlan" config lines. Follow these steps to get SPAN active on the switch. Cisco's NX-OS platform does it a little differently than traditional IOS, so I wanted to briefly post a walkthrough. Cisco calls this SPAN, and it's pretty easy to do. Example 1-5 displays the IPv4 BGP unicast summary. The Cisco ERSPAN feature allows you to monitor traffic on ports or VLANs and send the monitored traffic to destination ports. Nexus9K# config t. Enter configuration commands, one per line. Click on the port that you want to connect the packet sniffer to and select the Modify option. Configure the interface that you want to export packets with: Switch# destination source gigabitEthernet 0/1. First, you have to set up the monitor session and configure source and destination interfaces . The SPAN destination must use the same session number. Hopefully this resolves your issue. Starting Cisco IOS XE Denali 16.1.1 the command is: The monitor span session NAME on the interface did not match the globally defined span monitor session name. A very popular scenario for small networks is to have a Cisco ASA 5505 as border firewall connecting the LAN to the Internet. SPAN Session Creating a Bridging Loop? Server (config-if)#mtu 1492 Server (config-if)#peer default ip address pool CLIENT Server (config-if)#ppp authentication chap callin. Discover, learn, build, and collaborate on curated GitHub projects to jumpstart your work with Cisco platforms, products, APIs, and SDKs. Scenario 3: One VLAN configured. 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 . Port mirroring is a very valuable troubleshooting tool. Such a request could be to allow Remote Desktop (RDP) access from the Internet to an internal . End with CNTL/Z. Enter interface configuration mode for the specified Ethernet interface selected by the port values. R1 (config)#ip access-list ex PACKET_CAP_FILTER R1 (config-ext-nacl)#permit ip host 10.1.1.1 host 192.168.1.1 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. When the Add Session Destination window appears, complete the information as shown here in our example. However, the preparation of firewall devices to . These sections contain this conceptual information: Local SPAN Remote SPAN SPAN and RSPAN Concepts and Terminology SSH Configuration . This will display a graphic representing the port array of the switch. You can display the currently active user sessions on the switch using the show users command. Enter the IP address of the server your network analyzer is on (Change the IP address): Switch# destination 117.156.45.241. Stack members can trigger system messages. SPAN Session Creating a Bridging Loop? Related Resources . Switch1# configure terminal Switch1 (config)# monitor session 1 source interface fastEthernet0/2 Switch1 (config)# monitor session 1 destination interface fastEthernet0/24 Switch1 (config)#end Example 2-3 illustrates the filtering configuration on the SPAN session and verification using the show monitor session command. Click on the port that you want to connect the packet sniffer to and select the Modify option. Cisco IOS-XR Reference Guide is a systematic, authoritative guide to configuring routers with Cisco's next-generation flagship Internet Operating system, IOS-XR. 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. Like Local SPAN Source Port configuration, on RSPAN Config, we will also use "monitor session 1 source . Use the command show monitor session 1 to verify your configuration. After completing the RSPAN source session configuration on VDS, we will configure the Switch S1 and S2 such that mirror traffic is delivered to the Analyzer connected on the S2 port. The DevNet site also provides learning and . There's also live online events, interactive content, certification prep materials, and more. This will display a graphic representing the port array of the switch. Cisco Switch SPAN Port Filtering. With above configuration, you should be able to see PortChannel 200 traffic on your PC running . 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. Open a monitor session. Before moving to the configuration let's discuss the important terminology and details which will be used in the configuration. Documentation d'assistance . SPAN is used for troubleshooting connectivity issues and calculating network utilization and performance, among many others. R1#telnet 192.168.12.2 Trying 192.168.12 . ASA (config)#ntp trusted-key 1. for an example on how this can happen. Purpose. The IP address 192.168..1 / 24 is set on the internal interface. 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 . Please refer to the "RSPAN Deployment" diagram for the switch connectivity details. Example Configuration for B5/C5 SecureStack hardware. For Configuration Guides for the latest releases, see Configuration Guides. End with CNTL/Z. show flow exporter [exporter-name] example: show flow exporter Scrutinizer The port used for NetFlow traffic is specified in the configuration of your flowenabled Cisco appliance. CODE EXAMPLE 9-1 Setting Up a Port Mirroring Session. Explore repos. After logging in to R2 from R1 via Telnet, enter the terminal monitor command and then shutdown -> no shutdown on Se0/0. Very helpful. End with CNTL/Z. <cr> Press Enter to execute the command. 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. no monitor session 1 monitor session 1 source interface Fa1/2 monitor session 1 destination interface Fa1/3 . The Cisco Catalyst 3850 is a fixed, stackable GE (Gigabit Ethernet) access layer switch that converges wired and wireless within a single platform. Command: show interfaces status. If what you are looking for isn't listed, search Cisco.com Support or post in the Cisco Community. Cisco NetFlow configuration. Exemples et notes techniques de configuration. . a walkthrough. . By default, a switch sends the output from system messages and debug privileged EXEC commands to a logging process. Displays status and number of packets that are sent to and received from all AAA servers: show aaa servers. A session can have up to eight source ports and one destination port with the same session number. Using the incorrect logging . 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. 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 . Displays entries in the ip device tracking table: show ip device tracking all. The command output lists all active console port and Telnet sessions on the switch. (DTI SWITCH) #config (DTI SWITCH) (Config)# monitor session 1 mode (DTI SWITCH) (Config)#monitor session 1 source interface 0/7 ? Administrators in such networks are usually encountered with requests from their users that are not very security conscious. "community string" is like a preshared . The configuration is pretty straight-forward so let me give you some examples SPAN Configuration Let's start with a simple configuration. c. Encapsulated remote SPAN (ERSPAN). With Cisco NX-OS, you can send log messages to monitor . ASA (config)#ntp authentication-key 1 md5 fred. ntp logging. Scenario 1: Multiple VLANs configured. Configuration Example In this example, two concurrent SPAN sessions are created. Above you can see that we capture incoming traffic on the Gigabit 2 interface of R1. Select the Smartports option in the CNA menu. 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. EX Series.