Information Technology Reference
In-Depth Information
set of services that each branch should include. These profiles serve as a basis on which
integrated services and application networking are built. The three profiles for the enterprise
branch are as follows:
Small office:
Up to 50 users (single-tier design)
■
Medium office:
Between 50 and 100 users (dual-tier design)
■
Large office:
Between 100 and 1000 users (three-tier design)
■
Requirements such as high availability, scalability, and redundancy influence the branch
profile selected for a branch office.
To integrate the WA N edge and the LAN infrastructure, an ISR can be used to provide
voice, security, and data services. The ISR supports triple-speed interfaces
(10/100/1000), high-speed WA N interface cards (HWIC), network modules, and embed-
ded security capabilities.
ISR G2 New Features
The Cisco ISR second generation (ISR G2) series models of routers builds on the success
of the first-generation models, with new features that deliver better performance, a rich
set of new service options, and a single universal Cisco IOS software image. A couple of
the new innovations include the video-ready branch based on high-density digital signal
processors (DSP) and services virtualization, providing cloud extensibility and mission-
critical application survivability.
Ta ble 7- 5 compares the features of ISR versus ISR G2.
Ta b l e 7- 5
ISR Versus ISR G2 Feature Comparison
Cisco ISR
Cisco ISR G2
WA N p e r f o r m a n c e
Up to 45 Mbps with services
Up to 350 Mbps with services
Network processor
Single
Multicore with future expandability
Service module
performance and
capacity
1X and 160 GB storage
Up to 7X with dual core and 1 TB
storage
Onboard DSPs
Vo i c e o n l y
Vo i c e - a n d v i d e o - r e a d y D S P s
Switch modules
Fast Ethernet with Power over
Ethernet (PoE); based on Catalyst
3750
Fast Ethernet/Gigabit Ethernet with
POE+ based on Catalyst
3560E/2950
IOS image
Multiple images
Single universal IOS image
Services delivery
Hardware-coupled
Services on demand
Redundancy
Single motherboard
Field-upgradeable motherboard
Energy efficiency
EnergyWise
Real-time power reporting
