Enterprise Composite Network Model
It is highly available module design mechanism that make our network easier to scale,easier to comprehand and easier to troubleshoot. Now we are moving away from AVVID model to new and more scalable Model. Ealier we used to have a hierarchical model where we used to see it in layers like Core, Distribution, Access Layer.
Core layer: Its all about speed. Responsibility of this layer to switch traffic traffic from one point to another point in quickest amout of time.
Distribution layer: where packet manupulation and policy based connectivity is done (routers, multilayer switches running layer 3 services)
Access layer: Where customer plug in to the network(this layer contains customer router, switches, pc)
Enterprise Composite Network Model (ECN Model)-New Cisco Model
Above discussed three layers model did not completely go away. It has been absorbed and optimized in our new Enterprise Composite Network Model.
Three primary Modules/Areas:
Enterprise Campus
It has four sub-Modules.
1. Management Module (Authentication server,Controlnet server, monitoring server, IDS, syslog, system admin, out of band)
2. Building Module-Building Access, Building Distribution, Campus backbone(building core)
3. Servers Module-Server Farms(Internal Email server, Corporate server, Web server,DNS servers,Print servers)
4. Edge Distribution Module-It connects campus backbone to Enterprise Edge
Enterprise Edge
Enterprise Edge (Provides voice video and data services that going outside the enterprise, I allows to access internet and partner resources). It uses edge distribution module to connect Enterprise Campus as already discussed.
We have four sub-modules here:
1. WAN Module (FR/ATM/PPP)
2. E-commerce Module
3. Internet Connectivity Module
4. Remote Access/VPN Module
Service provider Edge
It has several sub-modules.
It is highly available module design mechanism that make our network easier to scale,easier to comprehand and easier to troubleshoot. Now we are moving away from AVVID model to new and more scalable Model. Ealier we used to have a hierarchical model where we used to see it in layers like Core, Distribution, Access Layer.
Core layer: Its all about speed. Responsibility of this layer to switch traffic traffic from one point to another point in quickest amout of time.
Distribution layer: where packet manupulation and policy based connectivity is done (routers, multilayer switches running layer 3 services)
Access layer: Where customer plug in to the network(this layer contains customer router, switches, pc)
Enterprise Composite Network Model (ECN Model)-New Cisco Model
Above discussed three layers model did not completely go away. It has been absorbed and optimized in our new Enterprise Composite Network Model.
Three primary Modules/Areas:
- Enterprise Campus (LAN,Server farms, data centre)
- Enterprise Edge (Provides voice video and data services that going outside the enterprise, It allows to access internet and partner resources)
- Service provider Edge (ISPs, PSTN, FR/ATM/PPP)
Enterprise Campus
It has four sub-Modules.
1. Management Module (Authentication server,Controlnet server, monitoring server, IDS, syslog, system admin, out of band)
2. Building Module-Building Access, Building Distribution, Campus backbone(building core)
- Campus backbone can have multilayer switches,routers.
3. Servers Module-Server Farms(Internal Email server, Corporate server, Web server,DNS servers,Print servers)
4. Edge Distribution Module-It connects campus backbone to Enterprise Edge
Enterprise Edge
Enterprise Edge (Provides voice video and data services that going outside the enterprise, I allows to access internet and partner resources). It uses edge distribution module to connect Enterprise Campus as already discussed.
We have four sub-modules here:
1. WAN Module (FR/ATM/PPP)
- Connects Enterprise Campus to Service Provider Edge.
2. E-commerce Module
- Database servers, Application servers, Web servers,Security servers dealing with money and e-shopping.
- We might have people coming through internet, so should have connectivity to Internet Module too.
3. Internet Connectivity Module
- Email servers,Security servers, Firewalls, public web servers
4. Remote Access/VPN Module
- IPSec, DSL, ISDN, Dial an access.
Service provider Edge
It has several sub-modules.
- Service provider Models(can have multiple ISPs for redundancy)
- Public switch telephone Network Module
- Frame-relay/ATM/PPP Module (Connects to Enterprise Campus through Enterprise Edge)
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