Cisco 2951 Memory Slots
Cisco devices usually have four types of memory that are being used for different purposes. These four types are:
We sell this NEW Cisco CISCO2951/K9 2900 Series 3x 1G RJ-45 4x EHWIC Slot Router with a warranty.Please call us at 800-430-6950 if you have any questions. Cisco CISCO2951/K9: Cisco 2951 with 3 onboard GE, 4 EHWIC slots, 3 DSP slots, 1 ISM slot, 256MB CF. MEM-2951-2GB is a 2GB DRAM for Cisco 2951 ISR. The default Cisco 2951 has a unique memory configuration, whereby a 512MB DIMM is installed in one of the two memory slots on the router. Memory upgrades on the Cisco 2951 can involve an increase in the density of that single DIMM or a combination of DIMMs with both slots populated. Cisco 2951 with 3 onboard GE, 4 EHWIC slots, 3 DSP slots, 1 ISM slot, 256MB CF default, 512MB DRAM default, IP Base. Data License for Cisco 2901-2951. Unified Communications License for Cisco 2901-2951. Security License for Cisco 2901-2951.
- ROM (Read-only memory) – stores a bootstrap program that is used to initialize a boot process. This is a read-only type of memory, so it can’t be altered.
- RAM (Random Access Memory) – the running configuration and routing tables of the device are stored here. This type of memory loses its content when a device is restarted.
- Flash memory – used to store IOS software images. Can also be used to store other files, for example backup configuration files. Retains its content even after a device is restarted.
- NVRAM (Nonvolatile RAM) – usually used to store a startup configuration file. This type of memory retains its content even after a device is powered down or restarted.
Cisco 2951 Memory Slots Software
We still receive quite a few POs on the 2900 series of ISRs from Cisco and even more hits at our website from users looking for information.
We put this comparison matrix together to help with the latter.
This info is also available elsewhere, but we have summarized this chart to show what people usually ask us about.
Of course, if we left anything out that you need, or if you have other questions, our Cisco experts would love to hear from you at 855-932-6627 or cisco@maximummidrange.com
Cisco Comparison Matrix ISRs 2901, 2911, 2921, 2951
Cisco 2951 Memory Slots Upgrade
| Integrated Services Router | Cisco 2901 | Cisco 2911 | Cisco 2921 | Cisco 2951 |
|---|---|---|---|---|
| Hardware-Based Cryptography and Acceleration | Yes | Same | Same | Same |
| Cisco Unified SRST Sessions | 35 | 50 | 100 | 250 |
| Cisco Unified CCME Sessions | 35 | 50 | 100 | 150 |
| WAN 10/100/1000 Ports | 2 | 3 | 3 | 3 |
| RJ-45-Based Ports | 2 | 3 | 3 | 3 |
| SFP-Based Ports | 0 | 0 | 1 | 1 |
| Service Module Slots | 0 | 1 | 1 | 2 |
| Double-Wide Service Module Slots | 0 | 0 | 1 | 1 |
| EHWIC Slots | 4 | Same | Same | Same |
| Double-Wide EHWIC Slots | 2 | Same | Same | Same |
| ISM Slots | 1 | Same | Same | Same |
| Onboard DSP (PVDM) Slots | 2 | 2 | 3 | 3 |
| Memory DDR2 ECC DRAM - Default | 512 MB | Same | Same | Same |
| Memory (DDR2 ECC DRAM) - Maximum | 2 GB | Same | Same | Same |
| Compact Flash (External) - Slot 0 | 256 MB | Same | Same | Same |
| Compact Flash (External) - Slot 1 | none | Same | Same | Same |
| Compact Flash (External) - Slot 0 | 4 GB | Same | Same | Same |
| Compact Flash (External) - Slot 1 | 4 GB | Same | Same | Same |
| USB 2.0 Flash Memory Slots (Type A) | 2 | Same | Same | Same |
| USB Console Port (Type B) | 1 | Same | Same | Same |
| Serial Console Port | 1 | Same | Same | Same |
| Serial Auxiliary Port | 1 | Same | Same | Same |
| Power-Supply Options | AC and PoE | AC, PoE, and DC | AC, PoE, and DC | AC, PoE, and DC |
| RPS Support (External) | No | Cisco RPS 2300 | Cisco RPS 2300 | Cisco RPS 2300 |
| Typical Power (No Modules) (Watts) | 40 | 50 | 60 | 70 |
| Max Power with AC Power Supply | 150 | 210 | 320 | 340 |
| Max Power with PoE Power Supply | 175 | 250 | 370 | 405 |
| Max Power with DC-PoE Power Supply | N/A | 140 | N/A | N/A |