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16
Overview of Cisco 2800 Series Routers
OL-5783-01
Interface Numbering
Figure 17 Rear Panel of the Cisco 2851 Router
Interface Numbering
Table 7 summarizes the interface numbering on a Cisco 2801 series router. Table 8 summarizes the
interface numbering on Cisco 2811, Cisco 2821, and Cisco 2851 series routers.
Note The interface numbering on Cisco 2800 series routers is different from the numbering on Cisco 2600
series routers.
Note On the Cisco 2801 router, the numbering format for slots is interface type 0/slot/port. “0” indicates slots
that are built into the chassis of a router. On the Cisco 2801 router, all slots begin with “0,” because all
slots are built into the chassis. Note that this is different from the Cisco 2811, Cisco 2821, and
Cisco 2851 routers. On these routers, some slots are built into the chassis and have slot numbers that
begin with “0”. However, it is possible to have other slots that are part of a network module or an
extension voice module. Those slots have slot numbers that begin with “1” or “2,” respectively.
1
Gigabit Ethernet port 0/0
6
High-speed WAN interface card slot 3
2
Gigabit Ethernet port 0/1
7 Extension voice module (EVM) slot
3
High-speed WAN interface card slot 0
8 Network module enhanced (NME) slot
1
1. The network module slot is compatible with Cisco network modules of type NM (network module), NME (network module enhanced), NME-X
(enhanced extended), NMD (double-wide), and NME-XD (enhanced extended double-wide).
4
High-speed WAN interface card slot 1
9
Screw holes for ground lug
5
High-speed WAN interface card slot 2
EVM 2 ONLY
A= ACT
GE 0/1
PVDM2PVDM1 PVDM0 AIM1 AIM0
GE 0/0
S= SPEED
A= FDX
A= LINK
A
F
S
L
A
F
S
L
H
W
I
C
2
H
W
I
C
0
H
W
I
C
3
H
W
I
C
1
1
95557
73
5
461
2
9
8