Cisco 3845 Hardware Guide - Page 24

Interface Card Ports, Interface Card in Network Module, Asynchronous Interface Numbering

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Port Numbering Note In the Cisco 3845 router, double-wide or extended double-wide network modules are identified by slot numbers 1 and 3. Ports in a network module are normally numbered from right to left and bottom to top, starting at 0. See the Cisco Network Modules Hardware Installation Guide for more information. Interface Card Ports Interface cards can be inserted either directly into a router slot, or into a slot in a network module. Interface Card in Router Interface cards inserted directly into a router slot are numbered 0/HWIC-slot/port. HWIC-slot is the HWIC slot in the router-0, 1, 2, or 3, as labeled on the router's rear panel; port is the port number in the interface card. For example, port 0 of a T1 WIC inserted into router HWIC slot 3 would be identified as t1 0/3/1. Note Double-wide interface cards use HWIC slot numbers 1 and 3. Ports in an interface card are normally numbered from right to left and bottom to top, starting at 0. See the Cisco Interface Cards Installation Guide for more information. Interface Card in Network Module Some network modules provide their own slots for interface cards. Ports in these interface cards are numbered router-slot/module-slot/port, where router-slot is 1 or 2 for the Cisco 3825 router and 1, 2, 3, or 4 for the Cisco 3845 router; module-slot is the slot in the network module for the interface card; and port is the port number in the interface card. For example, port 0 of a voice interface card in slot 1 of a voice network module in slot 4 of a Cisco 3845 router would be identified as voice 4/1/0. Note Double-wide or extended double-wide network modules use router slot numbers 2 and 4. Slots in network modules for interface cards are normally numbered from right to left, starting at 0. Ports in an interface card are normally numbered from right to left and bottom to top, starting at 0. For more information, see the Cisco Network Modules Hardware Installation Guide and Cisco Interface Cards Installation Guide. Asynchronous Interface Numbering For Cisco 3825 and Cisco 3845 routers, interface numbering for asynchronous interfaces is the same as for other interfaces. Use the interface number to specify the asynchronous line. For example, the command to configure port 1 of a 2-port asynchronous/synchronous WAN interface card in router HWIC slot 3 is interface serial 0/3/1. The command to configure the line associated with this port is line 0/3/1. Similarly, line 1/22 specifies the line associated with interface async 1/22 on a 32-port asynchronous network module in router slot 1. Overview of Cisco 3800 Series Routers 10 OL-5966-01

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Port Numbering
10
Overview of Cisco 3800 Series Routers
OL-5966-01
Note
In the Cisco 3845 router, double-wide or extended double-wide network modules are identified by slot
numbers 1 and 3.
Ports in a network module are normally numbered from right to left and bottom to top, starting at 0. See
the
Cisco Network Modules Hardware Installation Guide
for more information.
Interface Card Ports
Interface cards can be inserted either directly into a router slot, or into a slot in a network module.
Interface Card in Router
Interface cards inserted directly into a router slot are numbered 0/
HWIC-slot
/
port
.
HWIC-slot
is the
HWIC slot in the router—0, 1, 2, or 3, as labeled on the router’s rear panel;
port
is the port number in
the interface card. For example, port 0 of a T1 WIC inserted into router HWIC slot 3 would be identified
as
t1 0/3/1
.
Note
Double-wide interface cards use HWIC slot numbers 1 and 3.
Ports in an interface card are normally numbered from right to left and bottom to top, starting at 0. See
the
Cisco Interface Cards Installation Guide
for more information.
Interface Card in Network Module
Some network modules provide their own slots for interface cards. Ports in these interface cards are
numbered
router-slot
/
module-slot
/
port
, where
router-slot
is 1 or 2 for the Cisco 3825 router and 1, 2, 3,
or 4 for the Cisco 3845 router;
module-slot
is the slot in the network module for the interface card; and
port
is the port number in the interface card. For example, port 0 of a voice interface card in slot 1 of a
voice network module in slot 4 of a Cisco 3845 router would be identified as
voice 4/1/0
.
Note
Double-wide or extended double-wide network modules use router slot numbers 2 and 4.
Slots in network modules for interface cards are normally numbered from right to left, starting at 0. Ports
in an interface card are normally numbered from right to left and bottom to top, starting at 0. For more
information, see the
Cisco Network Modules Hardware Installation Guide
and
Cisco Interface Cards
Installation Guide
.
Asynchronous Interface Numbering
For Cisco 3825 and Cisco 3845 routers, interface numbering for asynchronous interfaces is the same as for
other interfaces. Use the interface number to specify the asynchronous line. For example, the command
to configure port 1 of a 2-port asynchronous/synchronous WAN interface card in router HWIC slot 3 is
interface
serial 0/3/1
. The command to configure the line associated with this port is
line 0/3/1
.
Similarly,
line 1/22
specifies the line associated with interface
async 1/22
on a 32-port asynchronous
network module in router slot 1.