I have a network of 6 routers ( A to F ) on an X25 backbone. Router A
has two Serial interfaces S0 S1.
into separate switches, every other router has a single serial into
there own switch. Each router has static routes set up to every other
router and two static routes set up to router A, S0 and S1 using
The ideas being 2 sites to use router (A) S0 and 3 sites router (A)
S1. All traffic must be able to us S0 if the switch at S1 fails. All
traffic must be able to use S1 if S0 fails.
The customer specifies no routing info to be passed across the X25
network because of the cost of the X25 packet so we are using using
static routes. It was ok befor the customer requested a second serial
connection at router A.
The problem is if the interface at Router A S0 goes down the routers
with a static route to Router A S0 do not know that the route is not
valid and does not put all traffic down the higher cost rout to router
Router A is a 4500 all others are 2500s. We also have a customer with
several hundred routers with the same problem.