Depending on how your network is setup you may also need to check if you have the following file

/etc/defaultrouter

It should contain the ip address of your default gateway

of course .. create /etc/defaultrouter file and add your gateway on your network
this is for permanently .. manually add with route command ..

route delete default 10.130.92.27
route add default your_gw

I deleted the default router(10.130.92.27) and try to add the new router but it is saying--

# route add default 142.102.100.60
add net default: gateway 142.102.100.60: Network is unreachable

I am also sending the o/p of netstat which shows 10.130.92.27 had been deleted as default router

# netstat -nr

Routing Table: IPv4
Destination Gateway Flags Ref Use Interface
-------------------- -------------------- ----- ----- ------ ---------
10.130.92.0 10.130.92.27 U 1 14 eri0
224.0.0.0 10.130.92.27 U 1 0 eri0
127.0.0.1 127.0.0.1 UH 28 264544 lo0


my main problem is that i am unable to reach the n/w.So please tell me How can I do that??

Oh dear .. dont u see that u have no gateway from your subnet to another ..firstly u must assign default gateway ..from which you can reach to another (of course if there is any way) .. ask to your admin what is default gateway of your net ..

Presumably there is a gateway on the 10.130.92.x network which knows how to connect to 142.102.100.60 so you should use that as your gateway. I suppose you could put in an explicit route to 142.102.100.60 but we don't know how you are wired, so we cannot hope to guess how exactly. (Presumably on eri0 so you could try to add a route to that address on that interface and see if it helps, but I suspect it won't.)

What was the solution then?