Cisco 2911 Module Slots
2021年6月22日Register here: http://gg.gg/v38gy
*CISCO2911-DC/K9 Datasheet Overview
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*Cisco 2911 Module Slots Module
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Refurbished Cisco 2911 Router, 3 x GE, 4 x Enhanced WIC, 2 x DSP, 1 x SM, 256MB Compact Flash Memory, 512MB DRAM Memory, IP Base Software with Warranty Cisco® 2900 Series Integrated Services Routers build on 25 years of Cisco innovation and product leadership. Feb 11, 2018 Cisco 2901, 2911, and 2921 routers have a single DRAM DIMM socket on the system board. Cisco 2951 and Cisco 3900 series have two DRAM DIMM sockets on the system board that are identified as DIMM 0 and DIMM 1. See the “Locating Internal Modules” section to find DIMM connectors on the router. C2911-VSEC-CUBE/K9 is the Cisco 2911 router with Voice Sec and CUBE Bundle, including PVDM3-16, UC and SEC License PAK, and FL-CUBEE-25. 1 service module slot 1. Cisco 2911 Integrated Services Router Integrated Services Router offers embedded hardware encryption acceleration, voice- and video-capable digital signal processor (DSP) slots, optional firewall, intrusion prevention, call processing, voicemail, and application services.
This page presents the Cisco ISR routers simulated in Cisco TM Packet Tracer 7.3.1 and the WAN Interface Cards (WIC) and Network Modules (NM) available for those equipments.Router devices emulated in Cisco Packet TracerCisco 1841 ISR router
The Cisco 1841 Integrated Services Router provides two fixed 10/100 (100BASE-TX) Ethernet ports, two integrated High-Speed WAN Interface Card (HWIC) slots that are compatible with WAN Interface Card (WICs) and Voice/WAN Interface Cards (VWICs), and one internal Advanced Integration Module (AIM) slot.Cisco 2620XM ISR router
The Cisco 2620XM Multiservice Router provides a one-network module slot platform with one fixed 10/100 (100BASE-TX) Ethernet port, two integrated WAN Interface Card (WIC) slots, and one Advanced Integration Module (AIM) slot.Cisco 2621XM ISR router
The Cisco 2621XM Multiservice Router provides a one-network module slot platform with two fixed 10/100 (100BASE-TX) Ethernet ports, two integrated WAN Interface Card (WIC) slots, and one Advanced Integration Module (AIM) slot.
The 2621XM supports the same modules that the 2620XM supports.Cisco 2811 ISR routerCISCO2911-DC/K9 Datasheet Overview
The Cisco 2811 Integrated Services Router provides one Enhanced Network-Module slot with two fixed 10/100 (100BASE-TX) Ethernet ports, four integrated High-Speed WAN Interface Card (HWIC) slots that are compatible with WAN Interface Card (WICs), Voice Interface Cards (VICs) and Voice/WAN Interface Cards (VWICs), and dual Advanced Integration Module (AIM) slots.Cisco 1941 ISR router
The Cisco 1941 Integrated Services Router (ISR) delivers highly secure data, mobility, and application services. Key features include two integrated 10/100/1000 Ethernet ports, 2 enhanced High-Speed WAN Interface Card slots, HWIC1 Internal Services Module slot, Fully integrated power distribution to modules supporting 802.3af Power over Ethernet (PoE) and Cisco Enhanced PoE.
Cisco 2901 ISR router
The Cisco 2901 Integrated Services Router (ISR) has been designed to delivers data, voice, video, and application services for branch offices. It includes 2 integrated 10/100/1000 Ethernet ports and 4 enhanced high-speed WAN interface card slots. This router key features are hardware-accelerated VPN encryption, integrated threat control, and 802.3af Power over Ethernet (PoE).Cisco 2911 ISR router
The Cisco 2911 Integrated Services Router (ISR) provides 2 integrated 10/100/1000 Ethernet ports, 4 enhanced high-speed WAN interface card (WIC) slots, 2 onboard digital signal processor (DSP) slots and 1 onboard Internal Service Module for application services.Cisco 819 ISR router
The Cisco 819 Integrated Services Router (ISR) supports machine-to-machine (M2M) applications that can enable enterprises to use 3G wireless WAN network services.Cisco 829 ISR router
Cisco 829 Industrial Integrated Services Routers provide highly secure, reliable, and easy-to-manage 3G/4G LTE WAN cellular and Wireless LAN connectivity for mobile environments.Cisco CGR 1240 rugged router
The CGR 1240 is a ruggedized communication platform, designed for use in Field Area Network (FAN) power distribution grids that require outdoor, pole-mounted routers. The FAN is a distribution system in which power generation and transmission are linked to the power consumers.Cisco 4321 ISR router (added in Cisco Packet Tracer 7.1)
Added in Packet Tracer 7.1, the Cisco 4000 Series Integrated Services Routers (ISR) revolutionize WAN communications in the enterprise branch. With new levels of built-in intelligent network capabilities and convergence, the routers specifically address the growing need for application-aware networking in distributed enterprise sites.Cisco 4331 Integrated Services Router (added in Cisco Packet Tracer 7.3)
Added in Cisco Packet Tracer 7.3, Cisco ISR 4331 and ISR 4321 feature Cisco IOS image resilience through secure boot-image and secure boot-config commands and add network programmability support to Packet Tracer through NETCONF / YANG protocols which are topics of the CCNP Enterprise ENCOR exam. Poker offline mod apk latest version downloads. Cisco ISR 4000 series support a large range of WAN or LAN connectivity options such as T1, T3/, serial, 10Gigabit Ethernet, and 4G LTE capabilities. It’s network programmability capabilities through NETCONF / YANG model allow operationnal cost savings and makes configuration of a large branch offices number easier.WIC modulesModule DescriptionWIC-1AM
The WIC-1AM provides one internal V.90 analog modems. This WIC can be used for basic telephone service connections. The WIC-1AM uses one port for connection to a standard telephone line, and the other port can be connected to a basic analog telephone for use when the modem is idle.WIC-1ENETThe WIC-1ENET is a single-port 10 Mbps Ethernet interface card, for use with 10BASE-T Ethernet LANs.WIC-1T
The WIC-1T provides a single port serial connection to remote sites or legacy serial network devices such as alarm systems, Synchronous Data Link Control (SDLC) concentrators, and packet over SONET devices.
Sync Max Speed : 2048 Mbit/s
Async Max Speed : 115.2 Kbit/sWIC-2AMThe WIC-2AM card features dual RJ-11 connectors, which are used for basic telephone service connections. The WIC-2AM has two internal V.90 analog modems to allow multiple data communication connections. These WICs can be used for incoming or outgoing analog modem calls.WIC-2T
The 2-port asynchronous/synchronous serial network module provides flexible multi-protocol support, with each port individually configurable in synchronous or asynchronous mode, offering mixed media dial support in a single chassis. Applications for asynchronous/synchronous support include:
- Low speed WAN aggregation (up to 128 Kbps),
- Dial-up modem support,
- Async or Sync connections to management ports of other equipment,
- Transport of legacy protocols such as Bi-sync and SDLC.HWIC-4ESWThe HWIC-4ESW provides four switching ports.HWIC-8ANew module included in CiscoPacket Tracer 6.0.1Cisco ISR routers. This serial modules allows out of band management of Cisco networking devices through their console port. The HWIC-8A module allows the connection of 8 console cables using the octal cable, each serial connection being mapped to a TCP port for telnet access.WIC-CoverThe WIC cover plate provides protection for the internal electronic components. It also helps maintain adequate cooling by normalizing airflow.Network modules (NM)Module DescriptionNM-1EThe NM-1E features a single Ethernet port that can connect a LAN backbone which can also support either six PRI connections to aggregate ISDN lines, or 24 synchronous/asynchronous ports.NM-1E2WThe NM-1E2W provides a single Ethernet port with two WIC slots that can support a single Ethernet LAN, together with two serial/ISDN backhaul lines, and still allow multiple serial or ISDN in the same chassis.NM-1FE-FXThe NM-1FE-FX Module provides one Fast-Ethernet interface for use with fiber media. Ideal for a wide range of LAN applications, the Fast Ethernet network modules support many internetworking features and standards. Single port network modules offer autosensing 10/100BaseTX or 100BaseFX Ethernet.NM-1FE-TXThe NM-1FE-TX Module provides one Fast-Ethernet interface for use with copper media. Ideal for a wide range of LAN applications, the Fast Ethernet network modules support many internetworking features and standards. Single port network modules offer autosensing 10/100BaseTX or 100BaseFX Ethernet. The TX (copper) version supports virtual LAN (VLAN) deployment.NM-1FE2WThe NM-1FE2W Module provides one Fast-Ethernet interface for use with copper media, in addition to two Wan Interface Card expansion slots. Ideal for a wide range of LAN applications, the Fast Ethernet network modules support many internetworking features and standards. Single port network modules offer autosensing 10/100BaseTX or 100BaseFX Ethernet. The TX (copper) version supports virtual LAN (VLAN) deployment.NM-2E2WThe NM-2E2W provides two Ethernet ports with two WIC slots that can support two Ethernet LANs, together with two serial/ISDN backhaul lines, and still allow multiple serial or ISDN in the same chassis.NM-2FE2WThe NM-2FE2W Module provides two Fast-Ethernet interfaces for use with copper media, in addition to two Wan Interface Card expansion slots. Ideal for a wide range of LAN applications, the Fast Ethernet network modules support many internetworking features and standards.
NM-2WThe NM-2W Module provides two WAN Interface Card expansion slots. It can be used with a broad range of interface cards, supporting a diverse array of physical media and network protocols.NM-4A/SThe 4-port asynchronous/synchronous serial network module provides flexible multi-protocol support, with each port individually configurable in synchronous or asynchronous mode, offering mixed-media dial support in a single chassis. Applications for Asynchronous/Synchronous support include: Low speed WAN aggregation (up to 128 Kbps), dial-up modem support, Async or Sync connections to management ports of other equipment, and transport of legacy protocols such as Bi-sync and SDLC.NM-4EThe NM-4E features four Ethernet ports for multifunction solutions that require higher-density Ethernet than the mixed-media network modules.NM-8A/SThe 8-port asynchronous/synchronous serial network module provides flexible multi-protocol support, with each port individually configurable in synchronous or asynchronous mode, offering mixed-media dial support in a single chassis. Applications for Asynchronous/Synchronous support include: Low speed WAN aggregation (up to 128 Kbps), dial-up modem support, Async or Sync connections to management ports of other equipment, and transport of legacy protocols such as Bi-sync and SDLC.NM-8AMThe NM-8AM Integrated V.92 analog modem network module provides cost-effective analog telephone service connectivity for lower-density remote-access service (RAS), dial-out and fax-out modem access, asynchronous dial-on-demand routing (DDR) plus dial backup, and remote router management. Both the 8-port and 16-port versions use RJ-11 jacks to connect the integrated modems to basic analog telephone lines on the public switched telephone network (PSTN) or private telephony systems.NM-CoverThe NM cover plate provides protection for the internal electronic components. It also helps maintain adequate cooling by normalizing airflow.
Related article: Silencing a Cisco 2951 router.
I recently purchased a Cisco 2911 to replace my 1921 for use at home, as I needed an extra WIC slot. Now that they’ve been obsoleted by the ISR 4000 series, they’re starting to appear on eBay for relatively palatable sums. For me, the 2911 was a good choice because it has four WIC slots and fits in a 450mm deep rack, whereas the 2901 requires at least a 600mm deep rack, which is far too large for my home office. The 1941 was another possibility, but it’s not enough of an upgrade, and quite frankly, too damn ugly.
Without even having to bother plugging it in and switching it on, I know this thing is going to be too noisy for a home environment. The good news is that the standard array of leaf-blower strength fans are only needed when this product is used in extreme situations, i.e. loaded up with a four WIC cards, a 24-port Gigabit switch service module, with PoE, all ports at full power, and roasting in a street cabinet on a searing hot day in Egypt.
As this does not remotely resemble my use case, I can do away with most of the cooling. First stop – the fan module:
Top is the original, which I am going deaf just looking at, and below is my modified module.
I’ve removed all four of the original fans and fitted a single 70mm 4-wire fan (Delta AFB0712HHB). In order to prevent the system log from filling up with warnings about failed / missing fans, I’ve connected the tach signal from that one fan to the input for the 3 fans.
A quick run of ‘show env’ reveals that this has done the trick. The router being none the wiser to three of the fans being absent.
Just in case it isn’t obvious – the pinout for that connector (Molex 44133-1208) is as follows:
*1 TACH – 40mm
*2 TACH – 70mm (rear-most fan)
*3 GND + Orange presence strap
*4 TACH – 70mm (middle fan)
*5 TACH – 70mm (front-most fan)
*6 GND (middle and front-most fan)
*7 PWM – 40mm
*8 PWM – 70mm (rear-most fan)
*9 +12V
*10 PWM – 70mm (middle fan)
*11 PWM – 70mm (front-most fan)
*12 Orange presence strap
Fortunately I have the Molex Micro-Fit 3.0 contact extraction tool, and crimp tool handy making this easy, but failing that a new connector and contacts could easily be purchased from Mouser.
In my setup, everything runs from a single battery backed regulated DC +12V source. This is no coincidence, as most I.T. equipment internally runs from +12V, meaning that in almost all cases my gear doesn’t require an internal power supply. This router is no exception, needing only a single +12V source (with 5V standby voltage), so I effectively don’t need the power supply here either.
Good news for this conversion, because that’s another source of heat done away with, in fact it means that I don’t need any cooling in the lower half of the router, so that inlet vent can be blanked up – focusing the cooling Mojo of my single 70mm fan solely on the top (mainboard) half of the router.
But it’s not quite that simple. On my previous router (a 1921) the +12V could be feed straight through to the mainboard with no extra components. On the 2911, we need a bit of extra stuff to satisfy it.
I whipped up a small emulator PCB which fits in place of the power supply’s original PCB, and has all the extra bits needed to satisfy the routers’ software / hardware – i.e. present its’ self as a PWR-2911-AC, leaving the router none-the-wiser to the fact that it is now powered by an impostor power supply. The downside is that there is nothing but empty wasted space in the lower half of the router.
I’m not going to go into the details of this, but you can download its schematic here. While I was at it, I moved the power switch and inlet to the rear and blanked up the front. A little more convenient, because it means I don’t have to grope around in the back of my rack. For anyone else with the desire and patience to construct an emulator board like mine, a 60W power brick can easily replace the internal power supply.
A quick check shows that IOS is happy with my phony power supply, with the temperature sensor working, serial number and model number still reading as per the original AC supply this replaces.See Full List On Cisco.com
The power consumption of an idle unloaded 2911 at the 12V stage is 1.8 Amps (about 23W) – show environment reports a lot higher (38W), I am assuming this takes into account inefficiency in the power supply.
If we are to assume that this is also the unit TDP – It’s practically bupkis given its large size. According to my scientific ‘finger on heatsink’ tests, all of my WIC cards run very cool. The mainboard ASIC also barely gets warm to the touch.Cisco 2911 Module Slots Module
The only thing I need to keep an eye on is the CPU temperature. The CPU in my unit is a Cavium Octeon (MIPS64), which is fairly energy efficient, but still chucks out the loins share of the heat. It has an internal temperature sensor, which we can read out with the ‘show environment’ command.
At 61 degrees, it is 2 degrees hotter than it was with the stock hurricane grade array of fans, where it sat at 59 degrees. Suffice to say that for my light use case, those fans are indeed completely unnecessary.For anyone thinking of attempting this…Cisco 2911 Module Slots Reset
Having a single fan is ideal, because there is no risk of irritating ‘beat patterns’ (which often occur when fans rotating at similar speeds are near each other) – but you can only get away with a single fan if also doing away with the power supply, there’s nothing in the service module bay, and the inlet for the lower half of the router is blanked up. As is the case with mine.More Cisco 2911 Module Slots Images
As the PWR-2911-AC does need a little bit of airflow at 30-40 watts, I would suggest replacing with three thinner 70mm fans (like the one I have used) and doing away with / blanking up the 40mm fan, because quiet 40mm fans have so little airflow they’re not really worth it, then strap the tach signal for the 40mm fan to one of the 70mm fans to eliminate software errors.
Register here: http://gg.gg/v38gy
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*CISCO2911-DC/K9 Datasheet Overview
*See Full List On Cisco.com
*Cisco 2911 Module Slots Module
*Cisco 2911 Module Slots Reset
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Refurbished Cisco 2911 Router, 3 x GE, 4 x Enhanced WIC, 2 x DSP, 1 x SM, 256MB Compact Flash Memory, 512MB DRAM Memory, IP Base Software with Warranty Cisco® 2900 Series Integrated Services Routers build on 25 years of Cisco innovation and product leadership. Feb 11, 2018 Cisco 2901, 2911, and 2921 routers have a single DRAM DIMM socket on the system board. Cisco 2951 and Cisco 3900 series have two DRAM DIMM sockets on the system board that are identified as DIMM 0 and DIMM 1. See the “Locating Internal Modules” section to find DIMM connectors on the router. C2911-VSEC-CUBE/K9 is the Cisco 2911 router with Voice Sec and CUBE Bundle, including PVDM3-16, UC and SEC License PAK, and FL-CUBEE-25. 1 service module slot 1. Cisco 2911 Integrated Services Router Integrated Services Router offers embedded hardware encryption acceleration, voice- and video-capable digital signal processor (DSP) slots, optional firewall, intrusion prevention, call processing, voicemail, and application services.
This page presents the Cisco ISR routers simulated in Cisco TM Packet Tracer 7.3.1 and the WAN Interface Cards (WIC) and Network Modules (NM) available for those equipments.Router devices emulated in Cisco Packet TracerCisco 1841 ISR router
The Cisco 1841 Integrated Services Router provides two fixed 10/100 (100BASE-TX) Ethernet ports, two integrated High-Speed WAN Interface Card (HWIC) slots that are compatible with WAN Interface Card (WICs) and Voice/WAN Interface Cards (VWICs), and one internal Advanced Integration Module (AIM) slot.Cisco 2620XM ISR router
The Cisco 2620XM Multiservice Router provides a one-network module slot platform with one fixed 10/100 (100BASE-TX) Ethernet port, two integrated WAN Interface Card (WIC) slots, and one Advanced Integration Module (AIM) slot.Cisco 2621XM ISR router
The Cisco 2621XM Multiservice Router provides a one-network module slot platform with two fixed 10/100 (100BASE-TX) Ethernet ports, two integrated WAN Interface Card (WIC) slots, and one Advanced Integration Module (AIM) slot.
The 2621XM supports the same modules that the 2620XM supports.Cisco 2811 ISR routerCISCO2911-DC/K9 Datasheet Overview
The Cisco 2811 Integrated Services Router provides one Enhanced Network-Module slot with two fixed 10/100 (100BASE-TX) Ethernet ports, four integrated High-Speed WAN Interface Card (HWIC) slots that are compatible with WAN Interface Card (WICs), Voice Interface Cards (VICs) and Voice/WAN Interface Cards (VWICs), and dual Advanced Integration Module (AIM) slots.Cisco 1941 ISR router
The Cisco 1941 Integrated Services Router (ISR) delivers highly secure data, mobility, and application services. Key features include two integrated 10/100/1000 Ethernet ports, 2 enhanced High-Speed WAN Interface Card slots, HWIC1 Internal Services Module slot, Fully integrated power distribution to modules supporting 802.3af Power over Ethernet (PoE) and Cisco Enhanced PoE.
Cisco 2901 ISR router
The Cisco 2901 Integrated Services Router (ISR) has been designed to delivers data, voice, video, and application services for branch offices. It includes 2 integrated 10/100/1000 Ethernet ports and 4 enhanced high-speed WAN interface card slots. This router key features are hardware-accelerated VPN encryption, integrated threat control, and 802.3af Power over Ethernet (PoE).Cisco 2911 ISR router
The Cisco 2911 Integrated Services Router (ISR) provides 2 integrated 10/100/1000 Ethernet ports, 4 enhanced high-speed WAN interface card (WIC) slots, 2 onboard digital signal processor (DSP) slots and 1 onboard Internal Service Module for application services.Cisco 819 ISR router
The Cisco 819 Integrated Services Router (ISR) supports machine-to-machine (M2M) applications that can enable enterprises to use 3G wireless WAN network services.Cisco 829 ISR router
Cisco 829 Industrial Integrated Services Routers provide highly secure, reliable, and easy-to-manage 3G/4G LTE WAN cellular and Wireless LAN connectivity for mobile environments.Cisco CGR 1240 rugged router
The CGR 1240 is a ruggedized communication platform, designed for use in Field Area Network (FAN) power distribution grids that require outdoor, pole-mounted routers. The FAN is a distribution system in which power generation and transmission are linked to the power consumers.Cisco 4321 ISR router (added in Cisco Packet Tracer 7.1)
Added in Packet Tracer 7.1, the Cisco 4000 Series Integrated Services Routers (ISR) revolutionize WAN communications in the enterprise branch. With new levels of built-in intelligent network capabilities and convergence, the routers specifically address the growing need for application-aware networking in distributed enterprise sites.Cisco 4331 Integrated Services Router (added in Cisco Packet Tracer 7.3)
Added in Cisco Packet Tracer 7.3, Cisco ISR 4331 and ISR 4321 feature Cisco IOS image resilience through secure boot-image and secure boot-config commands and add network programmability support to Packet Tracer through NETCONF / YANG protocols which are topics of the CCNP Enterprise ENCOR exam. Poker offline mod apk latest version downloads. Cisco ISR 4000 series support a large range of WAN or LAN connectivity options such as T1, T3/, serial, 10Gigabit Ethernet, and 4G LTE capabilities. It’s network programmability capabilities through NETCONF / YANG model allow operationnal cost savings and makes configuration of a large branch offices number easier.WIC modulesModule DescriptionWIC-1AM
The WIC-1AM provides one internal V.90 analog modems. This WIC can be used for basic telephone service connections. The WIC-1AM uses one port for connection to a standard telephone line, and the other port can be connected to a basic analog telephone for use when the modem is idle.WIC-1ENETThe WIC-1ENET is a single-port 10 Mbps Ethernet interface card, for use with 10BASE-T Ethernet LANs.WIC-1T
The WIC-1T provides a single port serial connection to remote sites or legacy serial network devices such as alarm systems, Synchronous Data Link Control (SDLC) concentrators, and packet over SONET devices.
Sync Max Speed : 2048 Mbit/s
Async Max Speed : 115.2 Kbit/sWIC-2AMThe WIC-2AM card features dual RJ-11 connectors, which are used for basic telephone service connections. The WIC-2AM has two internal V.90 analog modems to allow multiple data communication connections. These WICs can be used for incoming or outgoing analog modem calls.WIC-2T
The 2-port asynchronous/synchronous serial network module provides flexible multi-protocol support, with each port individually configurable in synchronous or asynchronous mode, offering mixed media dial support in a single chassis. Applications for asynchronous/synchronous support include:
- Low speed WAN aggregation (up to 128 Kbps),
- Dial-up modem support,
- Async or Sync connections to management ports of other equipment,
- Transport of legacy protocols such as Bi-sync and SDLC.HWIC-4ESWThe HWIC-4ESW provides four switching ports.HWIC-8ANew module included in CiscoPacket Tracer 6.0.1Cisco ISR routers. This serial modules allows out of band management of Cisco networking devices through their console port. The HWIC-8A module allows the connection of 8 console cables using the octal cable, each serial connection being mapped to a TCP port for telnet access.WIC-CoverThe WIC cover plate provides protection for the internal electronic components. It also helps maintain adequate cooling by normalizing airflow.Network modules (NM)Module DescriptionNM-1EThe NM-1E features a single Ethernet port that can connect a LAN backbone which can also support either six PRI connections to aggregate ISDN lines, or 24 synchronous/asynchronous ports.NM-1E2WThe NM-1E2W provides a single Ethernet port with two WIC slots that can support a single Ethernet LAN, together with two serial/ISDN backhaul lines, and still allow multiple serial or ISDN in the same chassis.NM-1FE-FXThe NM-1FE-FX Module provides one Fast-Ethernet interface for use with fiber media. Ideal for a wide range of LAN applications, the Fast Ethernet network modules support many internetworking features and standards. Single port network modules offer autosensing 10/100BaseTX or 100BaseFX Ethernet.NM-1FE-TXThe NM-1FE-TX Module provides one Fast-Ethernet interface for use with copper media. Ideal for a wide range of LAN applications, the Fast Ethernet network modules support many internetworking features and standards. Single port network modules offer autosensing 10/100BaseTX or 100BaseFX Ethernet. The TX (copper) version supports virtual LAN (VLAN) deployment.NM-1FE2WThe NM-1FE2W Module provides one Fast-Ethernet interface for use with copper media, in addition to two Wan Interface Card expansion slots. Ideal for a wide range of LAN applications, the Fast Ethernet network modules support many internetworking features and standards. Single port network modules offer autosensing 10/100BaseTX or 100BaseFX Ethernet. The TX (copper) version supports virtual LAN (VLAN) deployment.NM-2E2WThe NM-2E2W provides two Ethernet ports with two WIC slots that can support two Ethernet LANs, together with two serial/ISDN backhaul lines, and still allow multiple serial or ISDN in the same chassis.NM-2FE2WThe NM-2FE2W Module provides two Fast-Ethernet interfaces for use with copper media, in addition to two Wan Interface Card expansion slots. Ideal for a wide range of LAN applications, the Fast Ethernet network modules support many internetworking features and standards.
NM-2WThe NM-2W Module provides two WAN Interface Card expansion slots. It can be used with a broad range of interface cards, supporting a diverse array of physical media and network protocols.NM-4A/SThe 4-port asynchronous/synchronous serial network module provides flexible multi-protocol support, with each port individually configurable in synchronous or asynchronous mode, offering mixed-media dial support in a single chassis. Applications for Asynchronous/Synchronous support include: Low speed WAN aggregation (up to 128 Kbps), dial-up modem support, Async or Sync connections to management ports of other equipment, and transport of legacy protocols such as Bi-sync and SDLC.NM-4EThe NM-4E features four Ethernet ports for multifunction solutions that require higher-density Ethernet than the mixed-media network modules.NM-8A/SThe 8-port asynchronous/synchronous serial network module provides flexible multi-protocol support, with each port individually configurable in synchronous or asynchronous mode, offering mixed-media dial support in a single chassis. Applications for Asynchronous/Synchronous support include: Low speed WAN aggregation (up to 128 Kbps), dial-up modem support, Async or Sync connections to management ports of other equipment, and transport of legacy protocols such as Bi-sync and SDLC.NM-8AMThe NM-8AM Integrated V.92 analog modem network module provides cost-effective analog telephone service connectivity for lower-density remote-access service (RAS), dial-out and fax-out modem access, asynchronous dial-on-demand routing (DDR) plus dial backup, and remote router management. Both the 8-port and 16-port versions use RJ-11 jacks to connect the integrated modems to basic analog telephone lines on the public switched telephone network (PSTN) or private telephony systems.NM-CoverThe NM cover plate provides protection for the internal electronic components. It also helps maintain adequate cooling by normalizing airflow.
Related article: Silencing a Cisco 2951 router.
I recently purchased a Cisco 2911 to replace my 1921 for use at home, as I needed an extra WIC slot. Now that they’ve been obsoleted by the ISR 4000 series, they’re starting to appear on eBay for relatively palatable sums. For me, the 2911 was a good choice because it has four WIC slots and fits in a 450mm deep rack, whereas the 2901 requires at least a 600mm deep rack, which is far too large for my home office. The 1941 was another possibility, but it’s not enough of an upgrade, and quite frankly, too damn ugly.
Without even having to bother plugging it in and switching it on, I know this thing is going to be too noisy for a home environment. The good news is that the standard array of leaf-blower strength fans are only needed when this product is used in extreme situations, i.e. loaded up with a four WIC cards, a 24-port Gigabit switch service module, with PoE, all ports at full power, and roasting in a street cabinet on a searing hot day in Egypt.
As this does not remotely resemble my use case, I can do away with most of the cooling. First stop – the fan module:
Top is the original, which I am going deaf just looking at, and below is my modified module.
I’ve removed all four of the original fans and fitted a single 70mm 4-wire fan (Delta AFB0712HHB). In order to prevent the system log from filling up with warnings about failed / missing fans, I’ve connected the tach signal from that one fan to the input for the 3 fans.
A quick run of ‘show env’ reveals that this has done the trick. The router being none the wiser to three of the fans being absent.
Just in case it isn’t obvious – the pinout for that connector (Molex 44133-1208) is as follows:
*1 TACH – 40mm
*2 TACH – 70mm (rear-most fan)
*3 GND + Orange presence strap
*4 TACH – 70mm (middle fan)
*5 TACH – 70mm (front-most fan)
*6 GND (middle and front-most fan)
*7 PWM – 40mm
*8 PWM – 70mm (rear-most fan)
*9 +12V
*10 PWM – 70mm (middle fan)
*11 PWM – 70mm (front-most fan)
*12 Orange presence strap
Fortunately I have the Molex Micro-Fit 3.0 contact extraction tool, and crimp tool handy making this easy, but failing that a new connector and contacts could easily be purchased from Mouser.
In my setup, everything runs from a single battery backed regulated DC +12V source. This is no coincidence, as most I.T. equipment internally runs from +12V, meaning that in almost all cases my gear doesn’t require an internal power supply. This router is no exception, needing only a single +12V source (with 5V standby voltage), so I effectively don’t need the power supply here either.
Good news for this conversion, because that’s another source of heat done away with, in fact it means that I don’t need any cooling in the lower half of the router, so that inlet vent can be blanked up – focusing the cooling Mojo of my single 70mm fan solely on the top (mainboard) half of the router.
But it’s not quite that simple. On my previous router (a 1921) the +12V could be feed straight through to the mainboard with no extra components. On the 2911, we need a bit of extra stuff to satisfy it.
I whipped up a small emulator PCB which fits in place of the power supply’s original PCB, and has all the extra bits needed to satisfy the routers’ software / hardware – i.e. present its’ self as a PWR-2911-AC, leaving the router none-the-wiser to the fact that it is now powered by an impostor power supply. The downside is that there is nothing but empty wasted space in the lower half of the router.
I’m not going to go into the details of this, but you can download its schematic here. While I was at it, I moved the power switch and inlet to the rear and blanked up the front. A little more convenient, because it means I don’t have to grope around in the back of my rack. For anyone else with the desire and patience to construct an emulator board like mine, a 60W power brick can easily replace the internal power supply.
A quick check shows that IOS is happy with my phony power supply, with the temperature sensor working, serial number and model number still reading as per the original AC supply this replaces.See Full List On Cisco.com
The power consumption of an idle unloaded 2911 at the 12V stage is 1.8 Amps (about 23W) – show environment reports a lot higher (38W), I am assuming this takes into account inefficiency in the power supply.
If we are to assume that this is also the unit TDP – It’s practically bupkis given its large size. According to my scientific ‘finger on heatsink’ tests, all of my WIC cards run very cool. The mainboard ASIC also barely gets warm to the touch.Cisco 2911 Module Slots Module
The only thing I need to keep an eye on is the CPU temperature. The CPU in my unit is a Cavium Octeon (MIPS64), which is fairly energy efficient, but still chucks out the loins share of the heat. It has an internal temperature sensor, which we can read out with the ‘show environment’ command.
At 61 degrees, it is 2 degrees hotter than it was with the stock hurricane grade array of fans, where it sat at 59 degrees. Suffice to say that for my light use case, those fans are indeed completely unnecessary.For anyone thinking of attempting this…Cisco 2911 Module Slots Reset
Having a single fan is ideal, because there is no risk of irritating ‘beat patterns’ (which often occur when fans rotating at similar speeds are near each other) – but you can only get away with a single fan if also doing away with the power supply, there’s nothing in the service module bay, and the inlet for the lower half of the router is blanked up. As is the case with mine.More Cisco 2911 Module Slots Images
As the PWR-2911-AC does need a little bit of airflow at 30-40 watts, I would suggest replacing with three thinner 70mm fans (like the one I have used) and doing away with / blanking up the 40mm fan, because quiet 40mm fans have so little airflow they’re not really worth it, then strap the tach signal for the 40mm fan to one of the 70mm fans to eliminate software errors.
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