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would you be to answer option 2?
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Sdmconfig*.cfg when available in flash is a config that is needed if you want to factory-default the router.
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Sdmconfig*.cfg when available in flash is a config that is needed if you want to factory-default the router.

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From the website i got this info:<br />
SDM (Security Device Manager) allows you to configure and manage your router via the use of a GUI. Please find the steps below :<br />
<br />
1)Download the SDM-Vxx.zip file from Cisco's website.<br />
2)Ensure that you have the sdmconfig*.cfg file within your routers flash for your version of router. You can confirm this by using the command `show flash`.<br />
<br />
1) I tried to find SDM from cisco website but unable to find SDM, where I can download this file?<br />
<br />
2) from the info (website) i did not see any file that resemble &nbsp;sdmconfig*.cfg see the attachment , why should I do?<br />
<a href="https://filedb.experts-exchange.com/incoming/2014/07_w29/861641/router-2811-v1.JPG" target="_blank" class="file-inline" title="router-2811-v1.JPG (72 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>router-2811-v1.JPG</a>
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router-2811-v1.JPG

From the website i got this info:
SDM (Security Device Manager) allows you to configure and manage your router via the use of a GUI. Please find the steps below :

1)Download the SDM-Vxx.zip file from Cisco's website.
2)Ensure that you have the sdmconfig*.cfg file within your routers flash for your version of router. You can confirm this by using the command `show flash`.

1) I tried to find SDM from cisco website but unable to find SDM, where I can download this file?

2) from the info (website) i did not see any file that resemble  sdmconfig*.cfg see the attachment , why should I do?

Security Device Manager Cisco Router 2811

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.