Cisco Cisco IOS Software Release 12.2(2)XG

Asynchronous craft port 

The serial data channel supports all TCP/IP traffic to and from the AIC. This includes communication 
over IP with NOCs and data centers. The channel consists of one physical interface that provides support 
for the following applications:

Telnet

TL1

TFTP

SNMP 

The Cisco IOS assigns an IP address to the AIC for use by the serial data channel. To route traffic, the 
serial data channel uses IP over synchronous High-Level Data Link Control (HDLC). All IP packets 
coming to the Cisco router with a destination IP address that matches the AIC’s IP address are forwarded 
to the serial data channel using IP over HDLC. 

The asynchronous craft port supports Telnet to the AIC’s port number. This Telnet method, called 
local-CLI, is useful for debugging when remote Telnet to the AIC’s IP address (remote-CLI) is not 
applicable. For more information see the 

. 

The asynchronous craft port also supports an AIC boot sequence, similar to the ROM monitor in 
Cisco IOS, which allows the user to recover from a corrupted software image or configuration. See the 

.

NOC

37875

SNMP

Remote CLI

Local CLI

Serial

Data Channel

AIC IP 5.5.5.1

Cisco router

IOS

Packet sent by NOC

Dest IP address

5.5.5.1

TL1
SNMP
TFTP
TELNET
.... on
Ether port

IP

Asynchronous

Craft Port

IOS boundary