Wan Links - NetModule NB2700 User Manual

NB2700 User Manual
Figure 5.2.: WAN Links
soon as Link 3 goes down.
Links are being triggered periodically and put to sleep in case it was not possible to
establish them within a certain amount of time. Hence it might happen that permanent
links will be dialed in background and, as soon as they got established, replace low-
priority links again.
We recommend to use the permanent option for WAN links in general. However, in case
of time-limited mobile tariffs for instance, the switchover option might be applicable.
Settings
This page can be used to configure WAN specific settings like the Maximum Segment Size
(MSS). The MSS corresponds to the largest amount of data (in bytes) that the router
can handle in a single, unfragmented TCP segment. In order to avoid any negative side
effects the number of bytes in the data segment and the headers must not add up to
more than the number of bytes in the Maximum Transmission Unit (MTU). The MTU
can be configured per each interface and corresponds to the largest packet size that can
be transmitted.
MSS adjustment: Enable or disable MSS adjustment on WAN interfaces.
Maximum segment size: Maximum number of bytes in a TCP data segment.
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