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sh ver<br />
will tell you the license you have<br />
<br />
i'm not sure about how many are in use<br />
sh xlate<br />
will show you the current translations in use<br />
just look at how many internal unique IPs are there and that will tell you. &nbsp;<br />
<br />
What license do you have 10,50, or UL(which I assume you don't have if you are worried about number of licenses used)
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sh ver
will tell you the license you have

i'm not sure about how many are in use
sh xlate
will show you the current translations in use
just look at how many internal unique IPs are there and that will tell you.  

What license do you have 10,50, or UL(which I assume you don't have if you are worried about number of licenses used)

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<div class="content wysiwyg-content">
How can I tell how many licenses are in use, and how many I have on a pix 501?
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How can I tell how many licenses are in use, and how many I have on a pix 501?

pix user license

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.