
Configuring and Backing Up Permanent Connections • Chapter 7 323
Per-packet Load Balancing
By implementing the command no ip route-cache on a Cisco router, two
things on the router change. First, the router will load-balance traffic
across two equal cost paths on a packet-by-packet basis. Second, the
router will switch from the default setting of fast switching to process
switching. Process switching simply means that the router will do a route-
table lookup for each packet it must process. Because each route decision
is independent, packets will be distributed evenly across the two equal cost
paths. (See Figure 7.28.) Per-packet load balancing results ...