Interface loopback question

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Oct 30th, 2008
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I would like to know if I can use the interface loopback on access switches (Catalyst 3750) to reach them vía telnet.

I have an interface vlan defined with an ip address (interface vlan 10 ip address Management)but I need to access those devices with another ip address that I want to asign on a loopback interface.

Can I get some help please.



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Richard Burts Thu, 10/30/2008 - 07:05
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A loopback interface is a virtual interface as are SVIs (Switched Virtual Interface) such as VLAN interfaces. I believe that the 3750 supports configuration of VLAN interfaces but not the loopback interface. Why would you want a loopback interface instead of a VLAN interface?



glen.grant Thu, 10/30/2008 - 07:52
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I think it will support a loopback interface but it would have to have ip routing enabled with a dynamic routing protocol so the network knows how to get to it . If you have ip routing turned off it is not possible to use the loopback as the network would not know how to get there .


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