Cisco 1700 series 빠른 시작 매뉴얼 - 페이지 6

{카테고리_이름} Cisco 1700 series에 대한 빠른 시작 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Cisco 1700 series 6 페이지. Secure firewall management center
Cisco 1700 series에 대해서도 마찬가지입니다: 규정 준수 및 안전 정보 매뉴얼 (45 페이지), 매뉴얼 (15 페이지), 구성 매뉴얼 (25 페이지), 애플리케이션 노트 (41 페이지), 하드웨어 문제 해결 (12 페이지), 개요 매뉴얼 (13 페이지), 구성 (34 페이지), 매뉴얼 (5 페이지), 하드웨어 설치 매뉴얼 (46 페이지)

페이지 인쇄
Cisco 1700 series 빠른 시작 매뉴얼
Troubleshooting Leased Line Problems
Table 4-1
Leased Line Problems and Suggested Actions
Line State
Possible Cause
Serial x is up,
The possible cause is that a loop exists in the circuit.
line protocol is up
The sequence number in the keepalive packet changes to
(looped).
a random number when a loop is first detected. If the
same random number is returned over the line, a loop
exists.
Serial x is
The possible causes for this state are
administratively down,
• The serial interface has been disabled with the
line protocol is up.
• Different interfaces on the router are using the same
4-6
Cisco 1700 Router Software Configuration Guide
shutdown interface configuration command.
IP address.
Suggested Actions
Following are some steps you can take to isolate the
problem:
• Use the write terminal privileged EXEC command
to display any instances of the loopback command. If
the router has been configured with the loopback
command, enter the no loopback command to remove
the loop.
• Check to see if the DSU/CSU is configured in manual
loopback mode. If it is, disable manual loopback.
• Reset the DSU/CSU.
• If you are unable to isolate the problem, contact the
telephone company for help with troubleshooting.
Following are some steps you can take to isolate the
problem:
• Use the show configuration privileged EXEC
command to display the serial port configuration. If
"shutdown" is displayed after "interface Serial0," use
the no shutdown interface configuration command to
enable the interface.
• Use the show interface privileged EXEC command
to display the IP addresses for all router interfaces.
Use the ip address interface configuration command
to assign unique IP addresses to the router interfaces.