Routing Issue with fall back connectivity 1

[parthimp]

We r having a SCO Open server 5.0.4
The IP of the server is 192.1.45.201

We have two way connectivity to our corporate WAN, one via Leased Line and other via VSAT.

The IP of the router is 192.1.45.21
The IP of the VSAT IDU is 192.1.45.22 and the VSAT IDU is terminated in the Switch.

The default gateway is 192.1.45.21

The routed daemon is stopped.

Regularly we are accessing our corporate server 10.10.0.3
The routing table entry is

# netstat -r
Routing tables
Destination Gateway Flags Refs Use Interface
default 192.1.45.21 UGS 0 13 net0
localhost localhost UH 1 1686 lo0
192.1.45 loninew3 UC 1 0 net0
224 loninew3 UCS 0 0 net0


When ever the leased line is down the router redirects the packet via VSAT.
The hops are
192.1.45.21
192.1.45.22
...
...
10.10.0.3


Once this happens the routing tablw is being updated with

# netstat -r
Routing tables
Destination Gateway Flags Refs Use Interface
default 192.1.45.21 UGS 0 13 net0
10.10.0.3 192.1.45.22 ??? ? ? ????
localhost localhost UH 1 1686 lo0
192.1.45 loninew3 UC 1 0 net0
224 loninew3 UCS 0 0 net0

After this

When the Leased line comes up the Table is not getting refreshed. We have a problem in connecting the 10.10.0.3 server.

Can any one help in this regard.

Parthiban M Perumal
Mumbai - INDIA

 

[backoftheworm]

Have you played with route metrics? Your route to the server from the leased line should have a lower metric than the vsat route. Try 2 routes to 10.10.0.3. One through 192.1.45.21 with a hop count of 1. One through 192.1.45.22 with a hop count of 2. When the leased line is up, packets should be routed out the route with the lowest metric. If the leased line fails, packets will be directed out the VSAT route. When the leased line is restored, routing should revert to the leased line because this route has a lower metric than the vsat route.