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Other Network Considerations
Issue 2 December 2007 29
Reliability and Performance
All 9600 Series SIP IP Telephones respond to a ping or traceroute message sent from Avaya
Communication Manager or any other network source. The telephones do not originate a ping
or traceroute. The 9600 Series SIP IP Telephones offer and support “remote ping” and “remote
traceroute.” The switch can instruct the telephone to originate a ping or a traceroute to a
specified IP Address. The telephone carries out that instruction and sends a message to the
switch indicating the results. For more information, see your switch administration
documentation.
If applicable, the telephones test whether the network Ethernet switch port supports IEEE
802.1D/q tagged frames by ARPing the router with a tagged frame. For more information, see
VLAN Considerations
on page 94. If your LAN environment includes Virtual LANs (VLANs),
your router must respond to ARPs for VLAN tagging to work properly.
QoS
For more information about the extent to which your network can support any or all of the QoS
initiatives, see your LAN equipment documentation. See QoS
on page 40 for QoS implications
for the 9600 Series SIP IP Telephones.
All 9600 Series SIP IP Telephones provide some detail about network audio quality. For more
information see, Network Audio Quality Display on 9600 Series SIP IP Telephones
on page 30.
IEEE 802.1D and 802.1Q
For more information about IEEE 802.1D and IEEE 802.1Q and the 9600 Series SIP IP
Telephones, see IEEE 802.1D and 802.1Q
on page 40 and VLAN Considerations on page 94.
Three bits of the 802.1Q tag are reserved for identifying packet priority to allow any one of eight
priorities to be assigned to a specific packet.
● 7: Network management traffic
● 6: Voice traffic with less than 10ms latency
● 5: Voice traffic with less than 100ms latency
● 4: “Controlled-load” traffic for critical data applications
● 3: Traffic meriting “extra-effort” by the network for prompt delivery, for example, executive
e-mail
● 2: Reserved for future use
● 0: The default priority for traffic meriting the “best-effort” for prompt delivery of the network.
● 1: Background traffic such as bulk data transfers and backups
Note:
Note: Priority 0 is a higher priority than Priority 1.