3 Replies Latest reply on Jul 7, 2015 2:28 PM by cj!

    Turn ethernet interface 0/1 into subinterfaces remotely without hosing the connection?

    danielj_co New Member

      I have 6 locations with 3430 routers on our MPLS network that are all live. For each router, I need to change eth 0/1 so that it has subinterfaces for 3 VLANs.

       

      Here is one of the interface configs:

       

      interface eth 0/1

        description desc LAN Block 10.6.0.0/23

        ip address  10.6.0.1  255.255.254.0

        no ip proxy-arp

        ip access-policy LAN

        ip flow ingress

        ip flow egress

        no shutdown

        no lldp send-and-receive

       

      I need to turn it into this:

       

      interface eth 0/1

        encapsulation 802.1q

        no shutdown

      interface eth 0/1.1

        description LAN

        vlan-id 1 native

        ip address  10.6.0.1  255.255.254.0

        ip access-policy LAN

        ip flow ingress

        ip flow egress

        no shutdown

      interface eth 0/1.42

        description Wireless Guest

        vlan-id 42

        ip address  10.6.20.2  255.255.254.0

        ip flow ingress wireless

        ip flow egress wireless

        no shutdown

      interface eth 0/1.50

        description Shoretel VoIP VLAN 50

        vlan-id 50

        ip address  10.91.241.1  255.255.255.224

        no shutdown

       

      How can I do so remotely without hosing my connection as soon as I remove the ip address from eth 0/1 to create eth 0/1.1? I do not have ssh access through the WAN interface. There has to be some way to accomplish this though! I do know the trick about "reload in 10" so that the router will reboot to the previous config as long as I don't do a write mem first. These routers are in 6 remote locations with folks who don't know ssh from gopher, let alone talking them through serial access and getting them cables.

       

      Thanks for any suggestions!

        • Re: Turn ethernet interface 0/1 into subinterfaces remotely without hosing the connection?
          cj! Beta_User

          Hi danielj_co:

           

          If you're confident in your new configs and your sites can tolerate minor downtime, you can just copy to each unit's flash, copy to startup-configuration and schedule a reboot for overnight.

           

          Using a text editor, copy the contents of your new config to your computer's clipboard.  Logon to an AOS unit, go to the Enable prompt and disable event notification:

          no events

          Prepare the console so that you can paste the config from your clipboard:

          copy console mynewconfig.cfg

          Then paste (right-click using Putty).  After the paste operation is finished, press Ctrl-D.  Now copy the new config to startup-config:

          copy mynewconfig.cfg startup-config

          Schedule a reload (using hhh:mm format)

          reload in 10:00

          When prompted, choose NO to saving the configuration, otherwise the current running-configuration will overwrite your changes to startup-configuration.  Then choose YES that you're sure to reload.

           

          Note that command syntax may vary, depending on your AOS version.  Will this work for your situation?

           

          Best,

          Chris

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