382 Chapter 10: X.25/Frame Relay Topologies
Relay network became unavailable, the other service provider should remain unaffected,
and traffic should route through there. Load balancing would be a good idea in the
configuration specified in the figure, so choose your routing protocol wisely.
Figure 10-30
Suggested Solution for Scenario 3
The requirement that the Internet can be reached will be met, because if one of the central
sites becomes unavailable, traffic will travel through the other central site.
For the Internet providers, you also can use two different ones, as shown in the figure, with
Internet connections from both central site routers. If Provider A has a problem, traffic can
flow through the other provider. These decisions are determined by availability concerns.
Internet
Central site
Corporate servers
Corporate servers
Internet
Remote site 1
Remote site 2
Remote site 3
Remote site 4
MCI
AT&T
87200333.book Page 382 Wednesday, August 22, 2001 2:53 PM