Avaya Configuring and Troubleshooting Bay Dial VPN (DVS) Networks Instrukcja Użytkownika Strona 181

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Glossary
303509-A Rev 00 Glossary-5
RIP
Routing Information Protocol. A distance-vector protocol in the IP suite (used
by IP and IPX network-layer protocol) that enables routers in the same
autonomous system to exchange routing information by means of periodic
updates. For RIP, the best path to a destination is the path with the fewest
hops. RIP computes distance as a metric, usually the number of hops from the
origin network to the target network.
Security Parameter
Index (SPI)
A value that uniquely identifies a set of keys used to apply security to
messages that contain this value. The SPI value is an integer in the range of
256 through 65535. Setting the SPI value and the keys to 0 in Site Manager
turns off this security feature.
service provider
A corporation that uses a transmission facility, telecommunications
equipment, and network operation software to provide a telecommunications
network as a commercial service. Corporations subscribe to this type of
service to enable their mobile professionals and remote branch office
employees to have access to the corporate or “home” network.
Site Manager
Bay Networks application used to configure parameters on the Dial VPN
gateway.
static route
A manually configured route that specifies a transmission path that a packet
must follow. A static route specifies a transmission path to another network.
With Dial VPN, you configure a static route between the CPE router on the
remote user’s home network and the gateway because you want to restrict the
paths that packets follow to the path you specifically configure.
subnet mask
A template or filter imposed on an Internet address for the purpose of
separating members of a particular subnetwork. The “1” bits in the subnet
mask indicate the significant bit positions in the subnet address; the “0” bits
indicate bit positions that are ignored.
TMS
See Tunnel Management System.
TMS database
The TMS database (by default, UNIX ndbm) resides in the tunnel
management server. The main function of this database is to verify the
username (or domain) information supplied by the NAS, and to supply the
NAS with the tunnel addressing information (in the Grant message) it needs to
create a tunnel for a remote user. The Dial VPN administrator “provisions” the
database by entering the username/domain information and the tunnel
addressing information into the database when configuring TMS.
tunnel
A bidirectional IP path that exists between the Remote Annex and a Dial VPN
gateway. The tunnel can carry arbitrary network layer protocols in GRE
format within IP packets. The tunnel remains active until the remote node
disconnects from the Dial VPN network or an error occurs.
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