Product manual

AX Series Network Partition: Solution Guide [Basic] Second Edition
© 2009-2010 ALAXALA Networks Corporation. All rights reserved.
7
1.3 Combined L2 networks
In Network Partition, high availability is required to handle multiple networks. To achieve this, various routing
protocols (static, RIP OSPF, and BGP) are independently available for each partition in the Layer 3 networks.
Further, Network Partition combined with link aggregation and ring protocols is available in Layer 2 networks
(GSRP is also available starting with software ver.11.2.). This allows you to implement a system that takes
advantage of the various types of L2 networks, such as high-availability, fault-tolerant networks (FT networks),
as well as ring networks, which feature reliability and configuration flexibility.
The figure below is an example of a system utilizing the benefits described above.
Figure 1.3-1 Example of a configuration for a building network with FT networks and network
partition
Network partition combined with FT networks enables you to effectively implement a network system that has
both the high availability of FT networks and the high security achieved by separation into partitions. In addition,
because FT networks are mainly composed of core devices whose internal modules are duplicated and line
connections with surrounding switches are achieved through link aggregation, L2 switches of other vendors,
together with those of ALAXALA, can be used as the access edge devices, providing cost advantages when
proposing replacements.
As an example, Figure 1.3-1 illustrates a building occupied by more than one company (Corp. A and Corp. B).
In addition to sufficient reliability for the entire network system, each company requires an independent network
for security reasons, with a minimum level of additional equipment and cost increase. Network partition with an
FT network is the optimal solution to meet these requirements.
Corp. B
server
Corp. B
route
r
Corp. A
serve
r
AX2400S
L2 (FT network)
Premises/Building network
L2 (FT network)
AX3600S
In addition to reliable FT switches,
existing access edge nodes on the
premises can be reused
#1
.
Othe
r
L2SW
AX2400S
Othe
r
L2SW
AX6300S
AX1200S
AX6300S
(Inside) Corp. A
terminal
(Inside) Corp. B
terminal
(Inside) Corp. A
terminal
(Inside) Corp. A
terminal
(Inside) Corp. B
terminal
AX2400S
Server farm, etc.
#1: When link aggregation can be used for interoperability
AX6700S