IP маршрутизатор ISDN с двумя интерфейсами ISDN BRI ZYXEL Prestige 480. Инструкция на английском языке

Prestige 480
Dual BRI ISDN Router
User's Guide Supplement
Mega Bundle or Multiple ISPs Support
IP Alias
NetCAPI
RADIUS Accounting
Multiprotocol Support (IPX Routing and Bridging)
Backup and Restore Configuration File using FTP
Firmware and Configuration Files Upload using FTP
IP Policy Routing

Prestige 480 Dual BRI ISDN Router
Mega Bundle or Multiple ISPs Support
Basics
If ISPs do not support multilink bundle of more than 2 links, it would be impossible for a user to dedicate all
4 channels available in a P 480 to Internet access.  To differentiate P 480 from other similarly equipped
products, it is desirable to be able to support bundle of 4 links where P 480 calls a second ISP when the
traffic exceeds a certain threshold and split the traffic between the two connections.  The Prestige refers to
this multiple ISPs support as Mega Bundle.
Mega Bundle design is as listed below.
1.  One remote node is designated as the main ISP and another the supplementary ISP. The Prestige dials
the first and second link on the main ISP using the existing mechanism.
2.  If a supplementary remote node is specified, BOD behalves as if the maximum number of channels is 4
and the adding and dropping of channels are governed by the main remote node’s multilink parameters
alone.
3.  When the traffic triggers the third link (as determined by BOD), the Prestige calls the supplementary
ISP.  Since the new connection is a separate PPP session, it will have a different IP address and thus a
new interface.
4.  Because of NAT, if an IP connection is already assigned to a particular interface, then it must remain on
that interface.  For new connections, the round-robin method is used to assign a connection to either the
main or the supplementary ISP.  Non-IP traffic is simply distributed evenly on a packet-by-packet basis.
5.  Once the Prestige determines which interface a connection uses, the MP channel assignment within each
bundle remains the same as the existing method.
User's Guide Supplement                                                             1

Prestige 480 Dual BRI ISDN Router
ISP Remote Node and Supplementary Remote Node
The previous ZyNOS versions supported only one ISP account. That remote node is called as the “ISP
remote node”.  Now in ZyNOS v2.42, you can setup other ISP accounts and this is called as
“supplementary remote node”.
You can have several “Supplementary remote node”, but only one “ISP remote node”. These remote
nodes can work at the same time. “Supplementary remote” is almost the same as “ISP remote node”
except that “supplementary remote node” will not appear in the routing table as default route.
Configuring Mega Bundle
Step 1.  Configure an ISP remote node.
1. Setup ISP in Menu 4.
2. Set Multilink= BOD or Multilink= Always in Menu 4
Menu 11.2 - Remote Node PPP Options
Encapsulation= Standard PPP
Compression= No
BACP= Enable
Mega Bundle= None
Multiple Link Options:
BOD Calculation= Transmit or Receive
Min. Channels= 1
Max. Channels= 1
Figure 1 Remote Node PPP Options
2                                                            User's Guide Supplement