528 Chapter 14: SNA Topologies
Figure 14-15
252 Broadcasts
Minimizing Explorer Replication in Border-Peer Design
Branch-to-branch traffic in a DLSw+ design is minimal and rarely impacts border peer design.
The resources accessed every day by branch offices are usually at the central site.
To avoid unnecessary explorer forwarding to central-site resources, you can configure all
remote branch routers to peer to both their border peer and a data-center router. The attraction
of this is that if the dlsw icanreach command is added to Router Treva in Figure 14-16, when
the capabilities exchange is done between remote Router Reggie and Router Treva, Remote
Router Reggie will learn it can reach the mainframe. It will not have to send out an explorer for
the mainframe.
250 routers
250 routers
250 routers
250 routers
249 broadcasts
to spoke routers
3 broadcasts
between
router A, B,
C and D
87200333.book Page 528 Wednesday, August 22, 2001 1:41 PM