The Cisco 2921 router, supporting voice module, is designed for small offices.
Quick Specs Figure 1 shows the appearance of the 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 slot
1 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.
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.
Note:
① Compact flash 0 and 1 (0, right) ② ISM ③ PVDM3 0,1 and 2 (0 right) ④ EN (Enable B 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 by.
Back Panel
Amber
Initialized with error.
Blinking Green then turns off
CompactFlash is ready for removal.
CompactFlash 0
Green
Flash memory is by.
Back Panel
Amber
Initialized with error.
Blinking Green then turns off
CompactFlash is ready for removal.
S (Speed)
1 blink + pae
GE port operating at 10 Mb/s.
Back Panel
2 blink + pae
GE port operating at 100 Mb/s.
3 blink + pae
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 (B serial console port)
Green
The B 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.
Note:
① Compact flash 0 and 1 (0, right) ② EHWIC 0,1,2 and 3 (0, far right) ③ B 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 B 0 and 1 (1, top) 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
MEMB-1024FT
1GB B 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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