Cisco IOS 700 Release 4.0 includes
many new features to ease configuration and administration:
- Service Advertisement Protocol
(SAP) helper address for NetWare networks
- Stacker compression with Cisco IOS
routers
- IPX ping and IPX default route
- Automated callback initiated by
the D channel
- Second number fail-over
- RIP snapshot routing
- DHCP relay agent and server
- PAT
In addition to the preceding
features, the Cisco IOS 700 offers the following key benefits:
- DHCP relay agent -- This
feature forwards DHCP requests and responses between DHCP
clients and a specified DHCP server. DHCP automates TCP/IP
addressing, saving administration time and reducing the number
of IP addresses that a site may require.
- DHCP server -- The
Cisco 700 series can assign and manage IP addresses from a
specified address pool to DHCP clients.
- PAT -- This feature allows the
remote LAN to be configured by using private network addresses
that are invisible to the outside world. All data from the
remote LAN appears to be coming from the Cisco 700 series router
itself. A Cisco 700 series router only
needs a single IP node address, regardless of the number of remote workstations, providing significant potential savings when connecting to an Internet service provider (ISP), and greatly relieving the network management burden for both ISPs and corporate network managers.
DHCP is a client/server protocol that allows local hosts (called
DHCP clients) to request and receive IP configuration parameters
from a DHCP server. These parameters include the IP address, subnet mask, default gateway, Windows Internet Name Service (WINS) server, and Domain Name System (DNS) server.
DHCP is specified in RFC 2132
(obsoletes RFC 1541).
Cisco 700 series routers with Release
4.0 software support PAT, which enables local hosts on a private IP
network to communicate over a public network such as the Internet.
All traffic designated to an external address has its source IP
address translated before the packet is forwarded over the public
network. IP packets returning to the private network will have their
IP addresses translated back to a private IP address.
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