ControlByWeb WebRelay X-WR-1R12-1I5-5 User Manual page 38

Web Server and Setup Pages
SETTING BE LEFT AT 10MBPS UNLESS THE USER HAS A SPECIFIC REASON TO USE 100MBPS.
Mode
This option allows the Ethernet port to be set to Half Duplex or Full Duplex. Legacy Ethernet operates in
Half Duplex mode which means that devices can either send data or receive data, but not both at the
same time. Full duplex means that devices can send and receive data at the same time.
MTU Setting
MTU is a network parameter that stands for Maximum Transmission Unit. This defines the max size, in
bytes, of the TCP packets sent out from the device. This normally can be left alone, but there are some
circumstances where it might be beneficial to change it. One of these circumstances is when the device
is to be used over a VPN (virtual private network). VPN's add extra information to TCP packets, if the
new packets are too big to physically travel across the network (greater than about 1500 bytes) then the
packets will be split up. This causes problems for some firewalls and those firewalls will just discard the
packets. To fix this, the MTU can be adjusted until the TCP packets do not get split up.
To change the MTU, manually enter the advSetup.html (case sensitive) page into the address bar.
(http://192.168.1.2/advSetup.html). This new setup page will have a text box that will allow the MTU to
be changed. The valid range is 256 to 1476 bytes.
Page 38
WebRelay Users Manual
Xytronix Research & Design, Inc.