PassFinder AP2520 VoIP Router/Gateway Operation Manual
Version 1.10 / Mar. 2002
AddPac Technology Co., Ltd.
-
88
-
4.6.
Routing Configuration
The PassFinder AP2520 Gateway supports static routing protocol and dynamic
routing protocol. There are two kinds of dynamic routing protocol – Interior
Gateway Protocol (IGP) and Exterior Gateway Protocol (EGP.) IGP is used for
routing among the networks in the same manager’s domain while EGP is for
routing among the network in different manager’s domain. IGP includes RIP,
OSPF and IS-IS, and EGP includes BGP. The PassFinderAP2520 Gateway
supports only IGP – RIP and OSPF.
To use routing protocol in the PassFinderAP2520 Gateway, upload the routing
process to the Gateway and designate the network that is going to use the
routing process.
It is not easy to select routing protocol for each Gateway. Please note the
following when selecting routing protocol.
z
Network Size and Complexity
–
Normally, static routing is enough for
edge network. However, to perform dynamic routing in a small scale
network, use RIP. If the network is large or complex, use OSPF.
z
Whether Variable Length Subnet Mask (VLSM) Is Supported or Not
–
If
there are several subnet classes within the network, use routing protocol
that support VLSM such as static route, RIP v2 and OSPF.
Besides, the user needs to consider convergence time, reliability needs and
Internetwork delay characteristics.
The user can perform several kinds of routing protocol in the PassFinder
AP2520 Gateway at the same time. If several kinds of routing protocol is
used in one Gateway, each kind of protocol may have its own path for the
same destination. In this case, routing protocol has priority to be displayed
in the routing table in order of static route, OSPF route, RIP route and default
Information