Руководство Пользователя для Netopia 2e-h
How Your Cayman 2E-H Works
Cayman 2E-H User’s Guide
C-4
November 2000
Cayman 2E-H receives a DHCP request from a client computer, it
determines what address to assign by checking its DHCP lease table
to identify an unused address in its DHCP range. When it finds an
address that should be free, the Cayman 2E-H sends a broadcast
message on the network to verify that no other host is using the same
IP address. If another host indicates that it is using the selected
address, the Cayman 2E-H selects another address and repeats the
sequence until it finds an address that is not in use.
determines what address to assign by checking its DHCP lease table
to identify an unused address in its DHCP range. When it finds an
address that should be free, the Cayman 2E-H sends a broadcast
message on the network to verify that no other host is using the same
IP address. If another host indicates that it is using the selected
address, the Cayman 2E-H selects another address and repeats the
sequence until it finds an address that is not in use.
Dynamic allocation of IP addresses means that an IP address can be
reused when it is not longer needed by the client to which it is
assigned. Dynamic IP address allocation is particularly useful in
situations where clients connect to a network temporarily or where
a site needs to share a limited pool of IP addresses among a group of
clients that do not need permanent IP addresses.
reused when it is not longer needed by the client to which it is
assigned. Dynamic IP address allocation is particularly useful in
situations where clients connect to a network temporarily or where
a site needs to share a limited pool of IP addresses among a group of
clients that do not need permanent IP addresses.
Cayman 2E-H as
DHCP Client
DHCP Client
The Cayman 2E-H is configured at the factory to act as a DHCP client
on its WAN port. This means that, if substitute IP address information
is not configured for the WAN port, the Cayman 2E-H will send a
DHCP broadcast message asking for configuration information from
any available DCHP server. If a DHCP server is active on the network
connected to the WAN port, the Cayman 2E-H will accept and use
the network configuration settings the DCHP server provides to
configure the Ethernet settings for the WAN port.
on its WAN port. This means that, if substitute IP address information
is not configured for the WAN port, the Cayman 2E-H will send a
DHCP broadcast message asking for configuration information from
any available DCHP server. If a DHCP server is active on the network
connected to the WAN port, the Cayman 2E-H will accept and use
the network configuration settings the DCHP server provides to
configure the Ethernet settings for the WAN port.
About PPP
The Point-to-Point Protocol (PPP) is a set of network protocols that
enables you to connect TCP/IP hosts and networks over a serial
telephone connection (applicable to older versions of the Cayman
2E-H) or an Ethernet (xDSL or cable modem) connection. Extensions
to the PPP protocol suite enable a PPP link to support other network
protocols, including IPX, AppleTalk, and DECnet. The nodes at each
end of a PPP link are referred to as peers. Unlike client-server
networks, where one device is responsible for providing services to
another, peer-to-peer networks function as equals, providing
services to one another as needed.
enables you to connect TCP/IP hosts and networks over a serial
telephone connection (applicable to older versions of the Cayman
2E-H) or an Ethernet (xDSL or cable modem) connection. Extensions
to the PPP protocol suite enable a PPP link to support other network
protocols, including IPX, AppleTalk, and DECnet. The nodes at each
end of a PPP link are referred to as peers. Unlike client-server
networks, where one device is responsible for providing services to
another, peer-to-peer networks function as equals, providing
services to one another as needed.