Cisco 2921 3-Port Gigabit Wired Router (CISCO2921/K9)

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The Cisco 2921 router, supporting voice module, is designed for small offices.

Quick Specs

Figure 1 shows the appearance of the CISCO2921/k9.

CISCO2921/K9

Table 1 shows the Quick Specs of the CISCO2921/k9.

Product Code CISCO2921/k9
Rack Units 2U
Interfaces 3 integrated 10/100/1000 Ethernet ports (RJ-45 only)
Expansion Slot(s) 2 service module slot1 Internal Service Module slot

3 onboard digital signal processor slots

4 Enhanced high-speed WAN interface card (EHWIC) slots

RAM 512 MB (installed) / 2 GB (max)
Flash Memory 256 MB (installed) / 8 GB (max)
Dimensions 47 cm x 43.8 cm x 8.9 cm
Package Weight 18.93 Kg

Product Details

Figure 2 shows the front panel of the Cisco 2921 router.

CISCO2921/K9 Front LED

Note:

①AC OK  ②On/Off switch  ③AC power connector  ④Optional RPS adapter(blank panel shown)  ⑤LEDs area

Table 2 shows the LEDs area description.

LED Color Description
SYS Solid green Solid green indicates normal operation.
Blinking green System is booting or is in ROM monitor mode.
Amber System error.
Off Power is off or system board is faulty.
ACT Green Solid or blinking indicates packet activity between the forwarding and routing engine and any I/O port.
Off No packet transfers are occurring.
PoE Green PoE is available.
Amber Power supply is not supplying PoE power.
RPS Green System is running on external RPS power supply.
PS Green System is running.
Amber System is not running.

Figure 3 shows some LEDs on the back panel of the Cisco 2921 router.

CISCO2921/K9 Back LED

Note:

① Compact flash 0 and 1 (0, right)  ② ISM    ③ PVDM3 0,1 and 2 (0 right)  ④ EN (Enable USB console) ⑤ EN (Enable RJ-45 console)

⑥ SFP S  ⑦ SFP EN  ⑧ S (Speed)  ⑨ L (Link)

Table 3 shows the description of these LEDs on the back panel.

LED Color Description Location
CompactFlash 1 Green Flash memory is busy. Back Panel
Amber Initialized with error.
Blinking Green then turns off CompactFlash is ready for removal.
CompactFlash 0 Green Flash memory is busy. Back Panel
Amber Initialized with error.
Blinking Green then turns off CompactFlash is ready for removal.
S (Speed) 1 blink + pause GE port operating at 10 Mb/s. Back Panel
2 blink + pause GE port operating at 100 Mb/s.
3 blink + pause GE port operating at 1000 Mb/s.
L (Link) Green GE link is established. Back Panel
Off No GE link is established.
EN (RJ-45 console port) Green The RJ-45 console port is active. Back Panel
EN (USB serial console port) Green The USB console port is active. Back Panel
ISM Green Initialized. Back Panel
Amber Initialized with error.
Off Not installed.
SFP S Blinking green Blinking frequency indicates port speed. Back Panel
SFP EN Off Not present. Back Panel
Green Present and enabled.
Amber Present with failure.
PVDM 0, 1 and 2 Green PVDM is initialized. Back Panel
Amber PVDM is detected but not initialized.
Off No PVDM installed.

Figure 4 show the expansion slots and ports on the back panel.

The Cisco 2921/K9 supports expansion functions with modules and cards.

CISCO2921/K9 Back Slot

Note:

① Compact flash 0 and 1 (0, right)         ② EHWIC 0,1,2 and 3 (0, far right)        ③ USB serial port

④ RJ-45 serial console port                    ⑤ AUX port                                                ⑥ SFP

⑦ 10/100/1000 Ethernet port (GE 0/1 and GE 0/2)                                                  ⑧ 10/100/1000 Ethernet port GE 0/0

⑨ Ground                                                    ⑩ USB 0 and 1 (1, top)                           ⑪ Service module slots

Figure 5 shows the unboxing view of CISCO2921/K9.

Cards and Licenses

Table 4 shows some recommended models for this router.

Cards

Description

SM-ES3G-16-P

Enhanced EtherSwitch Service Module, L2/L3 switching, 16* 10/100/1000 GE ports, Enhanced POE, Cisco EnergyWise technology

SM-ES3G-24-P

Enhanced EtherSwitch Service Module, L2/L3 switching, 24 * 10/100/1000 GE ports, Enhanced POE, Cisco EnergyWise technology

VWIC3-2MFT-G703

Cisco Voice/WAN Card VWIC3-2MFT-G703

HWIC-2T

2-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card

EHWIC-1GE-SFP-CU

Cisco 1900, 2900, 3900 Router EHWIC WAN Card EHWIC-1GE-SFP-CU

EHWIC-4ESG

Four port 10/100/1000 Base-TX Gigabit Ethernet switch interface card for Cisco 1900 2900 3900 Routers

ISM-SRE-300-K9

Internal Services Module (ISM) with Services Ready Engine

PVDM3-16

16-channel high-density voice DSP module

MEM-CF-256U1GB

256MB to 1GB Compact Flash Upgrade for Cisco 1900,2900,3900

MEM-CF-256U2GB

256MB to 2GB Compact Flash Upgrade for Cisco 1900,2900,3900

MEM-CF-256U512MB

256MB to 512MB CF Upgrade for Cisco 1900,2900,3900 ISR

MEM-CF-256U4GB

256MB to 4GB Compact Flash Upgrade for Cisco 1900,2900,3900

MEMUSB-1024FT

1GB USB Flash Token

Licenses

Description

L-SL-29-SEC-K9=

Cisco 2900 License L-SL-29-SEC-K9 Security E-Delivery PAK for Cisco 2901-2951

L-SL-29-APP-K9=

Cisco Application Experience License ISR 2900 Series – includes licenses for: AppX, DATA and WAASX

L-SL-29-SECNPE-K9=

Cisco 2900 License L-SL-29-SECNPE-K9 SEC No Payload Encryption E PAK for Cisco 2901-2951

L-SL-29-UC-K9=

Cisco 2900 License L-SL-29-UC-K9= Unified Communication E-Delivery PAK for Cisco 2901-2951

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Cisco 2921 3-Port Gigabit Wired Router (CISCO2921/K9)