Cisco 1941 Hwic Slots
- HWIC-1DSU-T1 IP Base 1921 - 3945E 12.4(15)T IP Base 1841 - 3845 tied to platform slot density HWIC-4T1/E1 IP Base 2911 - 3945E 12.4(20)T IP Base 2821 - 3845 Max of 1 on 2911, 2 on 2821-2851 & 2921-2951, 4 on 3800, 3900 Serial Sync/Async Interface Modules HWIC-2A/S IP Base 1921 - 3945E 12.4(15)T IP Base 1841 - 3845 tied to platform slot density.
- The 1941 has 2 external Compact Flash slots supporting to extend up to 8GB. Figure 5 shows the internal view of the Cisco 1941. There is a blank Memory slot inside the device, supporting to extend memory.
- Cisco 1941 with EHWIC-4G-LTE-G From Ever changing code. 1 Product codding. 1.1 LED explained. Cisco Fourth-Generation (4G) Long-Term Evolution (LTE) Wireless WAN (WWAN) Enhanced High-Speed WAN Interface Card. This will depend on what slot.
- It can be inserted in the HWIC slots of a Cisco 1841 Integrated Services Router (ISR) and Cisco 2800 and 3800 Series Integrated Services Routers or in the WAN interface card (WIC) slot of a Cisco IAD2430 Series Integrated Access Device to provide integrated DOCSIS connectivity in conjunction with advanced services.
This post explains the interface numbering scheme used in Cisco 1800, Cisco 2800 and Cisco 3800 Series Routers. It also includes line numbering associated with async interfaces.
Existing router platforms (earlier than Cisco 1800, Cisco 2800, and Cisco 3800) contain a limitation. In some situations, such as when you insert WIC(s) out of order, the configuration of one WIC interface can be lost or applied to another WIC interface.
Platforms HWIC-2T Cisco 1841 2 Cisco 1861 No Cisco 1941 2 Cisco 2801 2 Cisco 2811, 2821, 2851 4 Cisco 2901, 2911, 2921, 2951 4 Cisco 3825 and 3845 4 Cisco 3925 and 3945 4 The Recommended Cables Table 3 shows the smart serial cabling for HWIC-2T. Product Number Cable Type Length Connector Type CAB-SS-V35MT V.35 DTE 10 ft (3m) Male.
Example: Assume that you have a serial WIC-2T in WIC slot 1 and WIC slot 0 is empty. The interfaces are named serial 0/0 and serial 0/1. If you insert another WIC-2T into slot 0, the new WIC interfaces are named serial 0/0 and serial 0/1. The old WIC interfaces become serial 0/2 and serial 0/3. Therefore, the old WIC interface configuration moves to the new WIC interfaces.
Refer to How Async Lines are Numbered in Cisco 3600 Series Routers for more information.
In order to overcome this limitation, Cisco 1800, Cisco 2800, and Cisco3800 series platforms now have a three-tiered interface numbering format (slot/subslot/port) for interfaces on WIC slots only.
Note: The slot information for the Cisco 3800 series is the same as the 2800/1800 interface and line numbering. See New Interface and Line Number Conventions for information on interface and line numbering.
New Interface and Line Number Conventions
This section describes the new conventions for interface and line numbering.
- The interface numbering scheme is the same for async interfaces and non-async interfaces. To configure the line associated with an async interface, use the interface number to specify the async line.For example, line 0/0/0 specifies the line associated with interface serial 0/0/0 on a WIC-2A/S in slot 0. Similarly, line 0/1/1 specifies the line associated with interface async 0/1/1 on a WIC-2AM in slot 1.
Note: This document uses the following words interchangeably:
- Network-module-slot and slot.
- Interface-card-slot and subslot.
- Ports on network modules are numbered like this:interface-number = network-module-slot/port
OR
interface-number = slot/port
- Ports on interface cards (such as WICs, VWICs and HWICs) installed directly in chassis slots is given here:interface-number = 0/interface-card-slot/port
OR
interface-number = 0/subslot/port
- This numbering convention is used for ports on interface cards that are installed in network module slots:interface-number = network-module-slot/interface-card-slot/port
OR
interface-number = slot/subslot/port
Note: The slot/subslot/port format only applies to WIC interfaces. Interfaces that are native to the network modules still use only the slot/port format. That is:
- <interface-name> slot/port is used whenever the interfaces are native on the network module.
- <interface-name> slot/subslot/port is used whenever the interfaces are on the WIC slot of a network module (NM).
- Here is an example for numbering when the motherboard slot number is always 0. The native interfaces on the motherboard are numbered like this:
- Fa0/0, Fa0/1 on Cisco 2811.
- Gi0/0, and Gi0/1 on Cisco 2821 and Cisco 2851.
The Motherboard WIC slots are numbered from 0 to 3. The number increments from right to left, and from bottom to top.
- Slot numbers for other slots increase from bottom to top, then right to left. Subslot numbers and port numbers within a slot also increase from bottom to top, then right to left.
Examples
Interfaces native to an extension network module (ENM):
If the ENM carries WIC cards, the WIC slot numbers start from 0:
The extension voice module (EVM) slot analog interfaces are numbered from voice-port 2/0/0 to voice-port 2/0/23, following the NM-HDA convention.
Interface Numbering
This section lists the interface numbering details for Cisco routers.
Table 1 – Interface Numbering on Cisco 1841
Cisco 1941 Hwic Slots Slot Cisco 2811 PlatformWhat Are Hwic SlotsFigure 1 shows the interface numbering on Cisco 2811 platform with:
Figure 1 – Interface Numbering on Cisco 2811 Platform Cisco 2851 PlatformFigure 2 shows the interface numbering on Cisco 2851 platform with:
Figure 2 – Interface Numbering on Cisco 2851 Platform Slots on Cisco 1841, 2801, 2811, 2821, 2851 RoutersThis section illustrates the positions of the various slots on Cisco 1841, 2801, 2811, 2821, 2851 routers. Figure 3 – Rear Panel of the Cisco 1841 Router
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