求救各位老大
思科2503通过CONSOLE口连接，出现下列信息后，不再响应键盘的信息。各位老大有什么高见？？？？？
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%LINK-3-UPDOWN: Interface BRI0, changed state to up
%LINK-3-UPDOWN: Interface Ethernet0, changed state to up
%LINK-3-UPDOWN: Interface Serial0, changed state to down
%LINK-3-UPDOWN: Interface Serial1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to down
%LINK-5-CHANGED: Interface BRI0, changed state to administratively down
%SYS-5-CONFIG_I: Configured from memory by console
%SYS-5-RESTART: System restarted --
Cisco Internetwork Operating System Software
IOS (tm) 3000 Software (IGS-I-L), Version 11.0(16), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1997 by cisco Systems, Inc.
Compiled Tue 24-Jun-97 12:20 by jaturner
%LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0, changed state to down
%LINK-5-CHANGED: Interface Ethernet0, changed state to administratively down
%LINK-5-CHANGED: Interface Serial0, changed state to administratively down
%LINK-5-CHANGED: Interface Serial1, changed state to administratively down
