Transcript Common IP Network Topologies

Introduction to various
LAN configurations for
Mark Wallis
Atlas Gentech
o3/May/2o1o
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Scenario 1 Standard Topology
Usage: MFIM IP is routable from the clients Network, but iPECS Devices exist on the iPECS `System IP Range`
This is the normal installation topology for iPECS.
Advantages: Keep Clients IP Address space free. IP Addresses for iPECS Devices & Client network can’t conflict. Local
Phontage Devices do not use an IP Channel
Disadvantages: Under some circumstances there can be routing problems between Client PC’s Phontage and iPECS
System IP assigned Devices (see note)
Note:
iPECS Devices
System IP range
For best voice packet transmission for Phontage
Devices (192.168.1.0/24), input a second system
IP Address (192.168.1.1 / 255.255.255.0)
otherwise in local mode, only 1 Phontage can
communicate with the LGCM (although
communication with local IP phones is fine)
10.10.10.0/24
MFIM
LGCM8
192.168.10.25
10.10.10.13
Ext 702
10.10.10.12
IP Network
Client Routers
Ext 700
10.10.10.10
Assigned range
192.168.10.254
To
192.168.10.240
Ext 701
10.10.10.11
Client PCs
Assigned range
192.168.10.100
To
192.168.10.200
Client Servers
And fixed peripherals
Assigned Range
192.168.10.1
To
192.168.10.40
iPECS Dual Plane
IP Topology
MFIM + Client
Network
iPECS
Devices
Broadcast Domain
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192.168.10.0/24
10.10.10.0/24
Scenario 2 Flat Topology
Usage: MFIM IP and all its devices are routable on (or exist on) the iPECS `System IP Range`. i.e. they are all part of
the same IP Subnet
This is common where Local/Remote working is desired (eg for a company VPN)
Advantages: All Devices are routable – suits the use of Local/Remote sate for distant devices
Disadvantages: Uses IP Addresses on the clients network (IP Address space can be insufficient, either for the client
devices or iPECS devices). Conflicts in IP Addressing with clients devices are possible.
192.168.20.0/24
MFIM
LGCM8
192.168.10.20
192.168.10.33
Ext 702
192.168.10.32
A Local Remote
Network
(Routable by a nonNAT/NAPT router)
IP Network
Flat Plane
IP Topology
Client Routers
Ext 700
192.168.10.30
Assigned range
192.168.10.254
To
192.168.10.240
Ext 701
192.168.10.31
Client PCs
Assigned range
192.168.10.100
To
192.168.10.200
192.168.10.0/24
Client Servers
And fixed peripherals
Assigned Range
192.168.10.1
To
192.168.10.19
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MFIM, iPECS
Devices + Client
10.10.10.0/24
Network
Broadcast Domain
Scenario 3 Concurrent Topology
Usage: MFIM IP and all its devices are on the same IP network, but the Client’s devices are on a different IP
network (although the same physical network). A router can be employed to allow routing between the networks.
It is generally not employed (except as part of scenario 1).
Advantages: Like a VLAN it segregates routable Networks, has low possibility of IP Address conflict, utilises same
LAN switch devices for both networks
Disadvantages: Unlike a VLAN, it does not help in bandwidth management. A router is required if IP communication
between iPECS and Client network is required. Has a large broadcast domain.
MFIM
LGCM8
192.168.33.2
192.168.33.13
Ext 702
192.168.33.12
IP Network
Client Routers
iPECS Concurrent
IP Topology
Assigned range
Ext 700
192.168.33.10
192.168.10.254
To
192.168.10.240
Ext 701
192.168.33.11
Client PCs
Assigned range
192.168.10.100
To
192.168.10.200
Client Servers
And fixed peripherals
Assigned Range
192.168.10.1
To
192.168.10.40
Client
Network
Physical but not
Logical connection
MFIM + iPECS
Devices
Broadcast Domain
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192.168.10.0/24
192.168.33.0/24
Scenario 4 VLAN Topology
Usage: MFIM IP and Devices are on a VLAN built for ‘voice’ & inhabit the same IP Network, while the client’s
devices inhabit a different ‘data’ VLAN. Again a router can be employed to achieve routing (communication)
between the VLANs
This is usually part of a Voice QOS solution
Advantages: VLAN offers very controllable bandwidth management on the LAN, restricts broadcast traffic,
Disadvantages: more expensive switches (Smart or managed switches vs. ‘dumb’ switch) , more technically skilled
management required.
MFIM
192.168.10.201
VLAN 20
LGCM8
192.168.10.203
VLAN 20
Ext 702
192.168.10.204
VLAN 20
IP Network
Client Routers
iPECS VLAN
IP Topology
Assigned range
Ext 700
192.168.10.202
VLAN 20
192.168.10.254
To
192.168.10.240
Ext 701
192.168.10.205
VLAN 20
Client PCs
VLAN 1
Assigned range
192.168.10.100
To
192.168.10.200
Client Servers
And fixed peripherals
VLAN 1
Assigned Range
192.168.10.1
To
192.168.10.40
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Client
Network 192.168.10.0/24 VLAN 1
Separate Broadcast Domains
MFIM + iPECS 192.168.10.0/24 VLAN 20
Devices
Scenario 5 Separated Topology
Usage: All iPECS Devices are on a Physically separate network!
Sometimes employed at sites with an unstable or troublesome Office LAN.
Advantages: Provides for absolute bandwidth management, An IP Address conflict with the Client Network is
impossible. Similar advantages to VLAN but retains simple management.
Disadvantages: more expensive – more switches needed, need a router (or multilayer switch) to connect with client
network if connection is desired (e.g. for the Phontage client).
MFIM
LGCM8
10.10.10.2
10.10.10.14
Ext 702
10.10.10.13
IP Network
Client Routers
iPECS Separated
IP Topology
Assigned range
Ext 700
10.10.10.11
192.168.10.254
To
192.168.10.240
Ext 701
10.10.10.12
Client PCs
Assigned range
192.168.10.100
To
192.168.10.200
Client Servers
And fixed peripherals
Assigned Range
192.168.10.1
To
192.168.10.40
Client
Network
MFIM + iPECS
Devices
192.168.10.0/24
10.10.10.0/24
Separate Broadcast Domains
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Scenario 7 iPECS Isolated Topology
Usage: MFIM IP and all its devices may be on the same IP network. The major item defining the IP topology is the
router in the middle of the
It is not often employed (but sometimes installed to limit the effect of iPECS on a network)
Advantages: Like a VLAN it segregates routable Networks and breaks up the broadcast domain (less network
congestion)
Disadvantages: Requires an additional Router be installed,
Note:
MFIM
LGCM8
192.168.1.2
192.168.1.20
The iPECS part of the network is a flat topology,
allowing devices outside the Router to connect as localremote devices (which don’t use an IP channel).
The LAN edge router may need a static route to direct
voice traffic back to the iPECS router.
Ext 702
Remote or
Local-Remote mode
192.168.33.12
IP Network
192.168.33.253
192.168.1.254
Edge Router
192.168.33.254
‘Internal’
Router
Ext 700
192.168.1.10
iPECS Isolated
Topology
Ext 701
192.168.1.11
Client PCs
Assigned range
192.168.33.100
To
192.168.33.200
Client Servers
And fixed peripherals
Assigned Range
192.168.33.1
To
192.168.33.40
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Client
Network
192.168.33.0/24
Separate Broadcast Domains
MFIM + iPECS
Devices
192.168.1.0/24