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Thank you for your reply. Since you think it is right configuration, i kept trying it, and i found some config wrong. Finally It works!
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Thank you for your reply. Since you think it is right configuration, i kept trying it, and i found some config wrong. Finally It works!

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Expert<br />
Here is DNS request relay question. Please see the picture. R3 and R4 are DNS server, R1 is DNS client, which point to R3 as its DNS server. My question is if R3 cannot meet R1 DNS request, how can we configure <b>R3</b> in order that R3 transfer the request to R4 ? In R3, I used the command &quot;ip name-server 1.1.34.4(R4 ip address)&quot;, which points at R4, but it does not work. Thank you. <br />
<a href="https://filedb.experts-exchange.com/incoming/2013/10_w41/681227/Capture.JPG" target="_blank" title="dd (12 KB)"><img alt="dd" class="file-block lazyload" style="max-width: 336px;" data-src="https://filedb.experts-exchange.com/incoming/2013/10_w41/681227/Capture.JPG" /></a>
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Expert
Here is DNS request relay question. Please see the picture. R3 and R4 are DNS server, R1 is DNS client, which point to R3 as its DNS server. My question is if R3 cannot meet R1 DNS request, how can we configure R3 in order that R3 transfer the request to R4 ? In R3, I used the command "ip name-server 1.1.34.4(R4 ip address)", which points at R4, but it does not work. Thank you. 


How to transfer client' DNS request in Cisco router

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.

Routers

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.