the router connected to my isp was probleme (it stop or reload itself)
in sh context :
System was restarted by bus error at PC 0x60993B90, address 0xD7F98696 at 15:45:
52 UTC Sun Feb 4 2001
3600 Software (C3640-IO3-M), Version 12.1(5)T, RELEASE SOFTWARE (fc1)
Compiled Sat 11-Nov-00 07:06 by ccai (current version)
Image text-base: 0x60008950, data-base: 0x60A72000
Stack trace from system failure:
FP: 0x6124CA08, RA: 0x60993B90
FP: 0x6124CA58, RA: 0x609949DC
FP: 0x6124CB10, RA: 0x6098041C
FP: 0x6124CB30, RA: 0x60980910
FP: 0x6124CB90, RA: 0x604C98A8
FP: 0x6124CC00, RA: 0x604C9B7C
FP: 0x6124CC28, RA: 0x604C9D08
FP: 0x6124CC60, RA: 0x6040DE0C
----------
the probleme occurs often, what can I do to stop it