[lugj] Problem with switching Ip Addresses

[srinivas jinde]

Hi,


Suppose I have a set of machines whose ip addresses are changing, say
every 10 mins, then before making the tcp connect call (from a client)
how do I make sure all the switches and routers have updated their mac
Address and Ip Address mapping correctly and that it is latest and
correct?

Since I need to make sure the tcp connects to the machine which is
having a particular Ip Address,Can I send some application oriented
tcp packet which broadcasts in the network and let the switches and
routers update their mac Address and Ip Address mapping so that I am
able to connect to a particular Ip (which may not be on the same
machine every 10mins, but assume that a server is listening on all
these machines, maybe on a different NIC card than the one for which
the Ip Addresses are changing).

Is there a way I can achieve this?

If the switching of ip Addresses happens faster then how long does it
take for the switch or router to detect it.

I am facing this problem:
After switching of Ip Address happens, I am able to ping the Ip
Address for the new machine but the tcp connect call is not
succeeding.

(This is actually a case for warm redundant setup where in the current
active server takes a ip address.)

--
Srinivas Jinde ,
Research Engineer,
Application Software Group,
C-DOT, Bangalore.

[Deependra Singh Shekhawat]

google: arping

 

--
Srinivas Jinde ,
Research Engineer,
Application Software Group,
C-DOT, Bangalore.

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[sachin mittal]

you can also use concept of floating ip where your front end ip is same always irrespective of machine ip changing which is used in VRP's

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