Copyright © 2011, Juniper Networks, Inc. 15
APPLICATION NOTE -Deploying IP Telephony with EX Series Ethernet Switches
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3500131-003-EN Sept 2011
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This configuration is very straightforward; examples discussed previously in this document can be used as reference.
Furthermore, this method does not require any manual settings on either the VoIP phone or the endpoint host, as they
already belong to the correct domain as soon as they are physically connected.
Assigning Both Ports as Access Ports for Data VLAN with Voice VLAN Feature
Another two-port option is to assign both ports (where the VoIP phone and endpoint host are connected) into the data
VLAN and then configure the Voice VLAN feature. Manual configuration may be required if the VoIP phone is not LLDP-MED-
capable. The actual configuration is very similar to the configuration shown in the Access Port with Voice VLAN section.
Figure 16: Both ports as access ports of data VLAN with voice VLAN feature
Conclusion
When implementing an IP telephony solution, there are a number of options to consider before committing to the
actual deployment. This application note has discussed a variety of methods for implementing an IP telephone
solution, including the physical layout of VoIP phones and endpoint devices, the Voice VLAN feature of the EX Series,
LLDP and LLDP-MED, and more. These methods and technologies can and will make a difference in the successful
implementation of an IP telephony solution.
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www.juniper.net.
VoIP VLAN 99
VoIP
Data VLAN 10
Data
EX Series
Access Port
with Voice
VLAN feature
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