Users Manual
https://www.peplink.com 117 Copyright @ 2021 Peplink
recommended setting is Auto.
APN / Login
/ Password
/ SIM PIN
When Auto is selected, the information in these fields will be filled automatically. Select
Custom to customize these parameters. The parameter values are determined by and can be
obtained from the ISP.
WANConnectionSettings(Common)
The remaining WAN-related settings are common to both Ethernet and cellular WAN
Physical Interface Settings
Speed
This is the port speed of the WAN connection. It should be set to the same speed as the
connected device in case of any port negotiation problems.
When a static speed is set, you may choose whether to advertise its speed to the peer device
or not. Advertise Speed is selected by default. You can choose not to advertise the port speed
if the port has difficulty in negotiating with the peer device.
Default: Auto
MTU
This field is for specifying the Maximum Transmission Unit value of the WAN connection. An
excessive MTU value can cause file downloads stall shortly after connected. You may consult
your ISP for the connection's MTU value. Default value is 1440.
MSS
This field is for specifying the Maximum Segment Size of the WAN connection.
When Auto is selected, MSS will be depended on the MTU value. When Custom is selected,
you may enter a value for MSS. This value will be announced to remote TCP servers for
maximum data that it can receive during the establishment of TCP connections.
Some Internet servers are unable to listen to MTU setting if ICMP is filtered by firewall between
the connections.
Normally, MSS equals to MTU minus 40. You are recommended to reduce the MSS only if
changing of the MTU value cannot effectively inform some remote servers to size down data
size.
Default: Auto
MAC Address
Some service providers (e.g. cable network) identify the client's MAC address and require