The Cisco 3900 Series builds on the best-in-class offering of the existing Cisco 3800 Series Integrated Services Routers by now offering four platforms (Figure 1): the Cisco 3945E, Cisco 3925E, Cisco 3945, and Cisco 3925 Integrated Services Routers. The Cisco 3900 Series supports higher scale than previously provided on the Cisco 3800 Series, with up to 2.5 times the number of sessions.
The Cisco 3900 Series Integrated Services Routers (ISR) are designed to meet the application demands of today’s medium-to-large branches and to evolve to cloud-based services. They deliver virtualized applications and highly secure collaboration through the widest array of WAN connectivity at high performance that offers concurrent services at up to 375 Mbps. All Cisco 3900 Series Integrated Services Routers (ISR) have modular design that allows for reuse of a broad array of existing modules that meet business requirements while maximizing investment protection.
Figure 1. Cisco 3900 Series Integrated Services Routers
Cisco 3900 Series Routers VS Cisco 3800 Series Routers
The new Cisco 3900 Series Integrated Services Routers compare with the Cisco 3800
Series Integrated Services Routers, comparison of Cisco 3825, 3925, 3925E, 3845, 3945, and 3945E Integrated Services Routers as below table:
|
Feature Comparison |
Cisco 3825 |
Cisco 3925 |
Cisco 3925E |
Cisco 3845 |
Cisco 3945 |
Cisco 3945E |
|
Default/maximum flash memory |
64/256 MB |
256 MB/4 GB |
256 MB/2 GB |
64/256 MB |
256 MB/4 GB |
256 MB/2 GB |
|
Default/maximum DRAM |
256 MB/1 GB |
1 GB/4 GB |
1 GB/4 GB |
256 MB/1 GB |
1 GB/4 GB |
1 GB/4 GB |
|
Compact flash slots |
1 |
2 |
2 |
1 |
2 |
2 |
|
Built-in LAN connectivity |
Two |
Three 10/100/1000 |
Four |
Two |
Three 10/100/1000 |
Four |
|
Integrated SFP slots |
1 |
2 |
2 |
1 |
2 |
2 |
|
Upgradable processor board |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Multicore processor |
No |
Yes |
Yes |
No |
Yes |
Yes |
|
USB host ports |
2 |
2 |
2 |
2 |
2 |
2 |
|
USB console |
No |
Yes |
Yes |
No |
Yes |
Yes |
|
WAN slots |
4 HWICs |
4 EHWICs |
3 EHWICs |
4 HWICs |
4 EHWICS |
3 EHWICS |
|
Advanced-integration-module (AIM) slots |
2 |
0 |
0 |
2 |
0 |
0 |
|
ISM slots |
0 |
1 |
0 |
0 |
1 |
0 |
|
PVDM (digital-signal-processor [DSP]) slots on motherboard |
4 (no PVDM3) |
4 (PVDM2 or 3) |
3 (PVDM2 or 3) |
4 (no PVDM3) |
4 (PVDM2 or 3) |
3 (PVDM2 or 3) |
|
Network-module slots |
2 |
2 (with SM carrier) |
2 (with SM carrier) |
4 |
4 (with SM carrier) |
4 (with SM carrier) |
|
Service-module slots |
0 |
2 SW or 1 SW and 1 DW |
2 SW or 1 SW and 1 DW |
0 |
4 SW or 2 SW and 1 DW |
4 SW or 2 SW and 1 DW |
|
Multigigabit fabric |
No |
Yes |
Yes |
No |
Yes |
Yes |
|
Integrated encryption |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Optional Cisco Inline Power (Power over Ethernet [PoE]) |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Optional Cisco Enhanced Inline Power (ePoE) |
No |
Yes |
Yes |
No |
Yes |
Yes |
|
Redundant power supply (RPS) |
Yes (external RPS) |
Yes (internal) |
Yes (internal) |
Yes (internal) |
Yes (internal) |
Yes (internal) |