Now that we've looked at the general hardware architecture of the shared memory routers and how IOS divides their memory, let's look at how IOS actually switches packets. IOS on shared memory routers supports the following:
There are three stages in IOS packet switching:
Receiving the packet
Switching the packet
Transmitting the packet
Figure 3-2 illustrates the steps of the packet receive stage.
The interface media controller detects a packet on the network media and copies it into a buffer ...