3Com 3C13636 Configuration Manual page 506

3Com Router 3000 Ethernet Family
Configuration Guide
All PCs on 192.168.1.0/24 support remote wakeup and the wakeup function must
work with power supplies, network adapters, and main boards.
Enable broadcast forwarding on interface Ethernet 1/0/1 on the router.
Ensure that only the Wakeup frames from the 192.168.2.1 segment are forwarded
to the 192.168.1.0/24 segment.
II. Network diagram
PC1
IP:192.168.2.1/24
Figure 10-2 Network diagram for implementing remote WOL with routers
III. Configuration procedure
Configure Router A:
<RouterA> system-view
[RouterA] interface Ethernet1/0/1
[RouterA-Ethernet1/0/1] ip address 192.168.1.2 24
[RouterA-Ethernet1/0/1] ip forward-broadcast 2100
[RouterA-Ethernet1/0/1] quit
[RouterA] acl number 2100
[RouterA-acl-basic-2100] rule 1 permit source 192.168.2.1 0
[RouterA-acl-basic-2100] rule 2 deny source any
10.7 Configuring Unicast Fast Forwarding
10.7.1 Brief Introduction to Unicast Fast Forwarding
Message forwarding efficiency is a key feature evaluating router performance.
According to regular flow, when a message arrives, the router will copy it from the
interface memory to the main CPU. The CPU specifies the network ID from the IP
address, consults with the routing table to get the best path for forwarding the message,
and encapsulates a link layer frame header for the message. The resulted frame is then
copied to the output queue via DMA (Direct Memory Access), and during this process
the main system bus is passed twice. This process can be repeated for message
forwarding.
In the unicast fast forwarding, cache is used to process messages. After the first
message is forwarded by searching routing table, corresponding exchange information
is generated in the cache, and forwarding of the following same messages can be
realized by directly searching the cache. This practice simplifies the queuing of IP
RouterA
Internet
3Com Corporation
10-5
Chapter 10 IP Performance Configuration
Ethernet1/0/1:
IP:192.168.1.1/24
192.168.1.1/24
PC2