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7253 Views 27 Replies Latest reply: Feb 3, 2011 5:33 AM by bedrock1977 RSS 1 2 Previous Next

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Router sub-interfaces for different VLANs

Jan 28, 2011 6:14 AM

bedrock1977 121 posts since
Nov 21, 2008

In this diagram, I am using the VLANs as backup connections if the frame-relay network goes down.  The only router with two ethernet ports is R1 which is a 2514.  The rest of the routers are 2520 and have a single ethernet port.  When I went to set up the sub-interfaces and assign an IP address, it gave me this error message:


% Configuring IP routing on a LAN subinterface is only allowed if that

subinterface is already configured as part of an IEEE 802.10, IEEE 802.1Q,

or ISL vLAN.


Router on a stick is configured on a 1721 router not shown on the diagram.  All the switch ports are configured as access ports with the correct vlan assignments.  Will this not work for what I'm trying to accomplish?







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