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SIP Release Notes 160 Document #: LTRT-26901
CPE SIP Products
3.5 Networking Constraints
This release includes the following known networking constraints:
1. Enabling the UDP checksum calculation is not applied to CALEA and IP-to-IP calls
with UDP connections. The UDP checksum field is set to zero in these cases.
Product
MP-11x MP-124
Mediant 600 Mediant 1000
Mediant 800 MSBG Mediant 1000 MSBG
Mediant 2000
Mediant 3000/TP-6310 Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410 Mediant 3000 HA/TP-8410
2. In certain cases, when the Spanning-Tree algorithm is enabled on the external
Ethernet switch port that is connected to the device, the external switch blocks all
traffic from entering and leaving the device for some time after the device is reset. This
may result in the loss of important packets such as BootP and TFTP requests, which in
turn, may cause a failure in device start-up. A possible workaround is to set the ini file
parameter BootPRetries to 5, causing the device to issue 20 BootP requests for 60
seconds. Another workaround is to disable the spanning tree on the port of the
external switch that is connected to the device.
Product
MP-11x MP-124
Mediant 600 Mediant 1000
Mediant 800 MSBG Mediant 1000 MSBG
Mediant 2000
Mediant 3000/TP-6310 Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410 Mediant 3000 HA/TP-8410
3. Configuring the device to auto-negotiate mode while the opposite port is set manually
to full-duplex (either 10BaseT or 100BaseTX) is invalid. It is also invalid to set the
device to one of the manual modes while the opposite port is configured differently.
The user is encouraged to always prefer full-duplex connections over half-duplex, and
100BaseTX over 10BaseT (due to the larger bandwidth).
Product
MP-11x MP-124
Mediant 600 Mediant 1000
Mediant 800 MSBG Mediant 1000 MSBG
Mediant 2000
Mediant 3000/TP-6310 Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410 Mediant 3000 HA/TP-8410