User`s guide

VoiceFinder AP2120 VoIP Gateway User’s Guide Version 1.00
AddPac Technology Co., Ltd. -
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4.5. Routing Configuration
VoiceFinder AP2120 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 networks in different manager’s domains. IGP includes RIP,
OSPF and IS-IS, and EGP includes BGP. VoiceFinderAP2120 Gateway supports
only IGP – RIP and OSPF.
To use routing protocol of VoiceFinderAP2120 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
followings when selecting the 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 VoiceFinder AP2120
Gateway at the same time. If several kinds of routing protocol is used in one
Gateway, each 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 the
order of static route, OSPF route, RIP route and default route.
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