User`s manual

PPP Configuration
The current release supports multiple PPP sessions per PVC. The PPP
configuration in the WAN configuration page is for the first PPP session for each
PVC. The predefined PPP Account Name (Account ID) is “Simple PPP Account 0”
for PVC0 and predefined PPP Connection Name is “Simple PPP Session 0” for
PVC0. For the other PVC X, the predefined account name and connection name
will be Simple PPP Account X and Simple PPP Session X. X is the PVC number
from 1 to 7.
It can support up to total of 16 PPP sessions, and each PVC can support up to 8
PPP sessions. The multiple PPP sessions may be configured with any
combination over 8 PVCs.
For the multiple PPP sessions, please go to PPP Configuration page (Section
6.3).
• Service Name: The service name of PPP is required by some ISPs. If the ISP does not
provide the Service Name, please leave it blank.
• Disconnect Timeout: The Disconnect Timeout allows the user to set the specific period
of time to disconnect from the ISP. The default is 0, which means never disconnect from
the ISP.
• MRU: Maximum Receive Unit indicates the peer of PPP connection the maximum size of
the PPP information field this device can be received. The default value is 1492 and is
used in the beginning of the PPP negotiation. In the normal negotiation, the peer will
accept this MRU and will not send packet with information field larger than this value.
• MTU: Maximum Transmission Unit indicates the network stack of any packet is larger than
this value will be fragmented before the transmission. During the PPP negotiation,the peer
of the PPP connection will indicates its MRU and will be accepted. The actual MTU of the
PPP connection will be set to the smaller one of MTU and the peer’s MRU. The default is
value 1492.
• MSS: Maximum Segment Size is the largest size of data that TCP will send in a single IP
packet. When a connection is established between a LAN client and a host in the WAN
side, the LAN client and the WAN host will indicate their MSS during the TCP connection
handshake. The default value is 1432.