Chris Walker wrote:
With the Huawei, Windows will do lookups fine but Mandriva takes ages for everything, web searches, mail and so on. Sending this message sat there for ages doing a lookup for the smtp address before I cancelled it to add this.
I *think* I've got both sides, Windows 7 and Mandriva, setup the same with DHCP for both IP address and DNS servers but is there anything I can try before I rip the Huawei out and put back the D-Link?
I've seen slow lookups like you describe when a machine was misconfigured to have non-responding DNS servers in /etc/resolv.conf (to fix that remove the bad ones), or when IPV6 lookups are tried first (simple workaround is to disable ipv6).
You need to figure out what mandriva is sending to your DNS server. Try tcpdump/wireshark to sniff the network. It will also be useful to use "dig" to make explicit lookups to the DNS servers, to see if they send prompt responses.
-- Martijn