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The Cisco Discovery Protocol (CDP) is a device discovery protocol that runs over Layer 2 (the Data Link layer) on all Cisco-manufacturedĭevices (routers, bridges, access servers, and switches). Other Performance Management Enhancements
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After the new subinterface is configured further, the show interface command can display it along with its unique counters: When a subinterface is first created, the router recognizes it as an interface that, with few exceptions, is interchangeable RP/0/RSP0/CPU0:router# show run | begin HundredGigE 0/5/0/0 The show run command displays the trunk interface first, then the subinterfaces in ascending numerical order. RP/0/RSP0/CPU0:Sep 21 11:12:35.633 : config: %MGBL-SYS-5-CONFIG_I : Configured from console by root Use 'show configuration commit changes 1000000152' to view the changes. RP/0/RSP0/CPU0:Sep 21 11:12:34.819 : config: %MGBL-CONFIG-6-DB_COMMIT : Configuration committed by user 'root'.
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RP/0/RSP0/CPU0:router(config-subif)# commit RP/0/RSP0/CPU0:router(config-subif)# encapsulation dot1q 100 RP/0/RSP0/CPU0:router(config)# interface HundredGigE0/5/0/0.0
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In the following example, the card in slot 5 has trunk interface, HundredGigE 0/5/0/0. Subinterfaces can never have the same subinterface number under one trunk. For example, the following subinterfaces numbers are Subinterface numbers do not need to be contiguous or in numeric order. For a given trunk interface, each subinterface under it must have a unique value. The subinterface number must be a positive You can then assign a subinterface number to the subinterface that you want to create. If a trunk interface does not exist, you must create a bundle interface before creating any subinterfaces under it. To create a subinterface, you must first identify a trunk interface under which to place it. The following configuration samples are examples of the trunk interfaces that you can create:Ī subinterface is a logical interface that the system create under a trunk interface. However, the system does not automatically create bundle interfaces but you must create them at the time of cofiguration. On the router, the system automatically creates the physical interfaces when the router recognizes a card and its physical Must not confuse with the word trunk in the context of VLAN trunking. A main interface is also known as a trunk interface, which you In Cisco IOS XR, interfaces are, by default, main interfaces.