The "clear counters gi6/1" command does not seem to do anything.
The counters shown by "show counters interface gi6/1" are not affected when I try to clear them.
This is the IOS version information for this device:
Cisco Internetwork Operating System Software
IOS (tm) s72033_rp Software (s72033_rp-IPSERVICESK9_WAN-M), Version 12.2(18)SXF11, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by cisco Systems, Inc.
Compiled Fri 14-Sep-07 21:50 by kellythw
Image text-base: 0x40101040, data-base: 0x42DBA610
