Cisco announced the new Cisco ISR G2 routers today (integrated services router - second generation). This blog interrupts the SRST blog series, but I will get back to that conversation very soon. We will take a look at the ISR G2 routers in this blog.
The ISR G2 router families include the following models listed from smallest to largest form factor:
• 800 Series Routers (860, 880, 890)
• 1940 Series Routers (1941, 1941W)
• 2900 Series Routers (2901, 2911, 2921, 2951)
• 3900 Series Routers (3925, 3945)
Different ISR G2 router models have form factors akin to the 1800, 2800, and 3800 series routers they are meant to replace. The ISR G2 routers introduce support for new hardware components including the following:
• More onboard Gigabit Ethernet ports
• Console over USB using a micro USB form factor
• Internal Services Modules (replaces AIM)
• Services Modules (replaces network modules)
• EHWIC slots (replaces HWIC slots)
• PVDM3 modules
The G2 platforms accommodate the following throughput:
• 1941/2910 - up to 25Mbps
• 2911 - up to 35Mbps
• 2921 - up to 50Mbps
• 2951 - up to 75Mbps
• 3925 - up to 100Mbps
• 3945 – up to 150Mbps
Cisco sells adaptors that allow older network modules to fit service module (SM) slots. PVDM2 modules can be inserted into PVDM3 slots by using a PVDM2 to PVDM3 adapter. The PVDM3 modules are optimized for video and include the following form factors:
• PVDM3-16
• PVDM3-32
• PVDM3-64
• PVDM3-128
• PVDM3-192
• PVDM3-256
Survivable Remote Site Telephony (SRST) and Cisco Unified Communications Manager Express (CUCME) support the following number of devices in the ISR G2 routers:
• 2901 – 35 CUCME / 35 SRST
• 2911 – 50 CUCME / 50 SRST
• 2921 – 100 CUCME / 100 SRST
• 2951 – 150 CUCME / 250 SRST
• 3925 – 200 CUCME / 730 SRST
• 3945 – 300 CUCME / 1200 SRST
Cisco IOS 15.0 supports the ISR G2 routers with a single universal image. Cisco reduced the feature sets to four individual features sets in Cisco IOS 15.0. The capabilities of the purchased feature sets will be unlocked when the license is applied to the router.
In the next blog, we’ll get back to SRST configuration.
Read more about the ISR G2 at www.cisco.com/go/isrg2
Dennis Hartmann, CCIE No. 15651, is a consultant with www.highpoint.com and author of Implementing Cisco Unified Communications Manager, Part 1. Dennis is also a lead instructor at Global Knowledge. Dennis has various certifications, including the Cisco CCVP, CCSI, CCNP, CCIP, and the Microsoft MCSE. Dennis has various specializations including unified communications, data center, routing & switching, service provider (MPLS and optical). Dennis has worked for various Fortune 500 companies, including AT&T, Sprint, Merrill Lynch, KPMG, and Cabletron Systems. He lives with his wife and children in Hopewell Junction, New York.
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