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Chapter 2 Campus Infrastructure Considerations
IP Addressing and Management
Figure 2-12 shows examples of preferred IP addressing for connecting IP phones,
PCs, and Cisco IP SoftPhones.
Figure 2-12 Optional IP Addressing Plans
Here are some summary recommendations for IP addressing:
• Continue to use existing addressing for data devices.
• Add IP phones with DHCP as the mechanism for getting addresses.
• Use a unique range of IP addresses (for example, RFC 1918).
• Use the auxiliary VLAN feature where possible. This requires a switch
capable of handling 802.1Q with enhanced software.
IP phone + PC on
same switch ports
171.68.249.100
171.68.249.101
Real IP addresses
IP phone + PC on
separate switch ports
171.68.249.100
171.68.249.101
Real IP addresses
IP phone + PC
share the same device
(Cisco IP Softphone)
171.68.249.100
Real IP addresses
IP
IP
IP
40782
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