Routing on layer 3 switch without any VLAN.

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Jul 15th, 2008
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may be a very basic Q but need a help!

I have a 3550 switch all ports are in vlan 1.I made 2 ports as layer 3 ports by giving command 'no switchport' and then made them UP .Also gave both ports different IPs (port 6-> and port 7-> I connected a laptop on port6, gave ip and trying to ping did not work .So enabled ip routing on switch and configure a luck this time also.I want to communicate between these 2 IPs without creating VLANs.

BUT I am not sure is this a correct way ?Does switch will be able to ping 14 IP address this way?

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lee.reade Tue, 07/15/2008 - 00:53
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Well what you have done so far is oorrect, you need ip routing enabled on switch.

Also you will need to config the laptop to use as the default gateway, did you do this?



abdave Tue, 07/15/2008 - 00:56
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Thanks for confirmation that my approach was right. Perhaps I did'nt give default GW yet.Will try that .thanks again.

abdave Tue, 07/15/2008 - 02:30
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No luck.Routing not working.Below is the small LAB diagram. Please advice how to ping server from laptop.


1* 2* 3* 4* 5* 6* 7*


port 1 is directly connectted to laptop

port 2 is directly connected to a server

port 1 is enabled with 'no switchport' and has IP

Laptop has IP with default GW

port 2 is enabled with 'no switchport' and has IP

server has IP


nmooremvsc Tue, 07/15/2008 - 12:28
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Is the default gateway on the server Or is the a specific return route on the server letting it know how to get back to

abdave Tue, 07/15/2008 - 21:36
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no static routing. so no reverse route.I gave default gateway as and enabled routing by command 'ip routing'.it worked!

itdsmartnet Fri, 07/25/2008 - 04:34
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i think the firwall is enabled on your server or on Laptop i.e windows firewall. Turn it off and try to ping now.



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