Cisco bug
CSCuw15428 - FC Scale : Port error disabled due to tcam rewrite fail
The acl programming fails as the tcam usage has almost reached the limit and complains of no space.
'show system internal acl tcam-usage'
1 1 INPUT 2506/13114 0/3290 65496/68786* 16/13114 0/0 0/0
1 1 OUTPUT 7/4077 0/1645 0/11469 0/4077 6/1651 9/1654
The high value is due to a number of duplicate entries programmed.
module-1# sh process acltcam fwd-engine 1 input match interface fc 1/15 | inc d80601
00442 44 0 136 d80601 d80601 0 12 - - - - - - - - - | 0 0 0 0 0 0
02802 44 0 136 d80601 d80601 0 12 - - - - - - - - - | 0 0 0 0 0 0
08282 bb 0 136 d80601 6e028d 0 12 - - - - - - - - - | 0 0 0 0 1 0
0854a bb 0 136 d80601 6e028d 0 12 - - - - - - - - - | 0 0 0 0 1 0
08562 bb 0 136 d80601 6e028b 0 12 - - - - - - - - - | 0 0 0 0 1 0
08563 bb 0 136 d80601 6e028b 0 12 - - - - - - - - - | 0 0 0 0 1 0
In some cases, the tcam-usage value goes negative.
`show system internal acl tcam-usage`
TCAM Entries:
=============
Region1 Region2 Region3 Region4 Region5 Region6
Mod Fwd Dir TOP SYS SECURITY ZONING BOTTOM FCC DIS FCC ENA
Eng Use/Total Use/Total Use/Total Use/Total Use/Total Use/Total
--- --- ------ ---------- --------- ------------ --------- --------- ---------
3 3 INPUT 192/9824 0/0 -1126/-1126* 131/9824 0/0 0/0
From the 7.3.0 release onward, instead of a negative value, an unexpectedly large value will be displayed.
1 5 INPUT 598/9824 0/0 4294964129/4294964129* 523/9824 0/0 0/0