Cisco announced the 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. Let's take a look at the ISR G2 routers...
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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The new routers look nice.
The new routers look nice. I'm anxious to see what SM and EHWIC modules are offered.
is that all?
big yawner - why hasnt cisco offering faster router?
• 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
these sound ok if we were in the 90s - but these speed for today ? what is cisco smoking?
Those speeds sound the same
Those speeds sound the same as the 1800/2800/3800 series. But on Cisco's page, it mentions a high speed inter-module fabric. That makes me think that as long as the traffic can be CEF switched, it has a significantly faster throughput. I can't wait to see some real performance data published.
Performance
The 3845 was the fastest router in the ISR lineup and it had a maximum throughput of 45Mbps (T-3 speeds). The 3945 has over three times the performance of the 3845. If more throughput is a requirement, look at the 1000 series aggregation services routers (ASR): www.cisco.com/go/asr
If throughput and features
If throughput and features are required, then take a look at the Juniper SRX series....time to get real people.
JUNOS
It's worth mentioning that Cisco IOS knowledge does not translate directly to efficiency with JUNOS. JUNOS looks like C++ code compared to Cisco IOS. The Nexus NX-OS has made significant improvements to Cisco IOS. I have not tested IOS 15.0, but I hope many of NX-OS improvements have been put into 15.0.
Juniper
What types of traditional TDM voice ports can I connect to a Juniper router? I believe the answer is ZERO. :-) Juniper may be a competitor in this space as the IP trunking model continues to grow because JUNOS has SBC (Session Border Controller) functionality. SBC functionality is the same technology that the Cisco sales & marketing machine markets as CUBE (Cisco Unified Border Element). Cisco used to market CUBE as IP to IP Gateway (that's what you'll find in the feature set names if you download 12.4 IOS code). ACME makes very scalable session border controllers according to my friend at Verizon Business.
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