how to set up loopback# as source fro NTP and/or built-in DNS server ?

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Nov 1st, 2009
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I have created a loopback# interface which I would like to be used as the router source interface for the NTP client and/or built-in DNS server so everything originating whithin the router has only one and unique IP address (such as: logging source-interface Loopback#)

The documentation explains how to create virtual interfaces but I cannot find how to associate them to the mentioned services except logging.

IOS is 12.4.15T.9

Correct Answer by yjdabear about 7 years 7 months ago

For NTP, it's "ntp source [e.g. Loopback#]".

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Correct Answer
yjdabear Mon, 11/02/2009 - 06:29
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For NTP, it's "ntp source [e.g. Loopback#]".

yjdabear Mon, 11/02/2009 - 07:20
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For DNS, maybe this would do the trick:

! (from DNS view configuration mode)

dns forwarding source-interface [Vlan10]


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