Cisco NME-16ES-1G User Guide - Page 114
Verifying Inline Power Configuration, Enabling Switch Port Analyzer, Managing the ARP Table
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Configuration Tasks 16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Verifying Inline Power Configuration Step 1 Use the show power inline interface configured command to verifies the change by displaying the setting as configured: Router# show power inline interface configured Enabling Switch Port Analyzer You can monitor traffic on a given port by forwarding incoming and outgoing traffic on the port to another port in the same VLAN. A Switch Port Analyzer (SPAN) port cannot monitor ports in a different VLAN, and a SPAN port must be a static-access port. Any number of ports can be defined as SPAN ports, and any combination of ports can be monitored. SPAN is supported for up to 2 sessions. To enable SPAN, use the following commands beginning in privileged EXEC mode: Step 1 Step 2 Step 3 Command Purpose Router# configure terminal Enters global configuration mode. Router(config)# monitor session session-id Enables port monitoring for a specific session ("number"). {destination | source} {interface | vlan Optionally, supply a SPAN destination interface, and a interface-id | vlan-id}} [, | - | both | tx | rx] source interface. Router(config)# end Returns to privileged EXEC mode. To disable SPAN, use the following commands beginning in privileged EXEC mode: Step 1 Step 2 Step 3 Command Router# configure terminal Router(config)# no monitor session session-id Router(config)# end Purpose Enters global configuration mode. Disables port monitoring for a specific session. Returns to privileged EXEC mode. Managing the ARP Table To communicate with a device (on Ethernet, for example), the software first must determine the 48-bit MAC or local data link address of that device. The process of determining the local data link address from an IP address is called address resolution. The Address Resolution Protocol (ARP) associates a host IP address with the corresponding media or MAC addresses and VLAN ID. Taking an IP address as input, ARP determines the associated MAC address. Once a MAC address is determined, the IP-MAC address association is stored in an ARP cache for rapid retrieval. Then the IP datagram is encapsulated in a link-layer frame and sent over the network. Encapsulation of IP datagrams and ARP requests and replies on IEEE 802 networks other than Ethernet is specified by the Subnetwork Access Protocol (SNAP). By default, standard Ethernet-style ARP encapsulation (represented by the arpa keyword) is enabled on the IP interface. When you manually add entries to the ARP Table by using the CLI, you must be aware that these entries do not age and must be manually removed. 114 Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ