This document is not restricted to specific software and hardware versions. There are no specific prerequisites for this document. Before You Begin Conventionsįor more information on document conventions, refer to the Cisco Technical Tips Conventions. The configurations on all devices were cleared with the write erase command to ensure that they have a default configuration. Ensure that you understand the potential impact of any configuration or command on your network before using it. The configurations in this document were implemented in an isolated lab environment. To create the examples in this document, we used the following switches in a lab environment with cleared configurations:Ĭatalyst 3512XL switch running Cisco IOS 12.0(5.x)XUĬisco 2621 router running Cisco IOS 12.1(3)TĬisco 2621 router running Cisco IOS 12.1(1)T For further details on Inter-VLAN routing, refer to the Routing Between Virtual LANs Overview chapter of the Cisco IOS® Switching Services Configuration Guide, Release 12.1.
#Configure router on a stick cisco series
Catalyst 2900XL/3500XL/2940/2950/2970 series switches are Layer 2 (L2) switches, and are not capable of routing or communicating between the VLANs. We are using the Cisco 2600 router to do the Inter-VLAN routing between VLAN1 and VLAN2. We will create a trunk that will carry traffic from two VLANs (VLAN1 and VLAN2) across a single link between a Catalyst 3500 and a Cisco 2600 router.
ISL (Cisco proprietary protocol, and not supported by the 2940 or 2950 series switches)Ĩ02.1Q (Institute of Electrical and Electronics Engineers (IEEE) standard) Two ways in which Ethernet trunking can be implemented are: Trunking is a way to carry traffic from several VLANs over a point-to-point link between the two devices.
Cisco 36/4700 series routers, or other members of the Cisco 2600 series routers, with FastEthernet interfaces, and any Catalyst 2900XL, 3500XL, 2940, 2950 or 2970 can be used in the scenarios presented in this document to obtain the same results. This document provides sample configurations on InterSwitch Link (ISL) and 802.1Q trunking between a Catalyst 3512-XL switch and a Cisco 2600 router the results of each command are displayed as they are executed.
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