On Tuesday 05 May 2009, Rony wrote:
Kenneth Gonsalves wrote:
On Monday 04 May 2009 11:38:33 Ramkumar R wrote:
- Switching requires that you run a daemon that keeps pinging the
ISP's gateway to check if the link is up. When the link goes down, it should automatically take the current ethernet interface down and bring up the other interface. I'm not sure it's worth the trouble.
my experience with bsnl/airtel is that even if you can ping the gateway, the line may still be down further up the chain. You need to be able to ping something like google.com through the relevant ethernet card.
True. Mostly it is the DNS servers that don't come up properly.
This can be solved by using opendns or installing bind and running it as a caching NS; unless there are ISPs that block recursive queries going out of your network to the root servers/TLDs and the domain SOAs. MTNL and AirTel do not; Reliance/TataIndicom/BSNL ?