Cisco 2811 Slot Numbering

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.

1. Cisco 2811 Slot Numbering Software
2. Cisco 2811 Slot Numbering System
3. Cisco 2811 Slot Numbering Systems
4. Cisco 2811 Slot Numbering Tool

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.

Select Set Number. Drop-down list, select the set number (routing table. Entry number) that yo. U wish to view or configure. Complete the fields on the page. Delete This Entry. To delete (clear) the entry if desired. Display Routing Table. To view all the static routes you have defined, complete the following steps. Note To install double-wide interface cards in Cisco 2811, Cisco 2821, and Cisco 2851 routers, remove the slot divider. When the slot dividers are removed, slot 0 and slot 1 become slot 1, and slot 2 and slot 3 become slot 3. Figure 7 Interface Card Slot Locations on Cisco 2901.

Cisco 2811 Fan Part Number Does anyone know whether Cisco has part number for the large fan in 2811. I know p/n for small fan is already there, but I can't find any for large one( I think it s fan 3). Processing and voice mail support; high-density interfaces for a wide range of connectivity requirements; and sufficient performance and slot density for future network expansion requirements and advanced applications. Cisco 2811 Router 2800 Series ISR Manufacturer Cisco Systems, Inc Manufacturer Part Number CISCO2811 Product Type Cisco 2811 Router. The Cisco 2800 Series comprises four platforms (refer to Figure 1): the Cisco 2801, the Cisco 2811, the Cisco 2821, and the Cisco 2851. The Cisco 2800 Series provides significant additional.

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.

1. 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.
2. Ports on network modules are numbered like this:interface-number = network-module-slot/port

   OR

   interface-number = slot/port

3. 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

4. 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:

   • slot/port is used whenever the interfaces are native on the network module.
   • slot/subslot/port is used whenever the interfaces are on the WIC slot of a network module (NM).
5. 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.

6. 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

Cisco 2811 Slot Numbering Software

Interfaces native to an extension network module (ENM):

Cisco 2811 Slot Numbering System

If the ENM carries WIC cards, the WIC slot numbers start from 0:

Cisco 2811 Slot Numbering Systems

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

Interface Numbering on Various Cisco Routers

This section provides information on interface numbering on various platforms.

Cisco 2811 Platform

Figure 1 shows the interface numbering on Cisco 2811 platform with:

• HWICD-9FE in WIC slot 1.
• VWIC-2MFT-T1 in WIC slot 2.
• VIC2-2FXS in WIC slot 3.
• NM-HDV2-1T1/E1 which has 1 NATIVE T1/E1 port & VWIC-2MFT-T1 in its WIC slot 0.

Figure 1 – Interface Numbering on Cisco 2811 Platform

Cisco 2851 Platform

Figure 2 shows the interface numbering on Cisco 2851 platform with:

• HWIC-1GE in WIC slot 0.
• HWIC-4T in WIC slot 1.
• WIC-1SHDSL in WIC slot 2.
• VWIC-2MFT-T1 in WIC slot 3.
• NMD-36ESW in ENM slot 1 and EVM-HD-8FXS/DID in EVM slot.

Figure 2 – Interface Numbering on Cisco 2851 Platform

Slots on Cisco 1841, 2801, 2811, 2821, 2851 Routers

This 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

Figure 8 – Rear Panel of the Cisco 2851 Router