% 'tcam_mgr' detected the 'resource not available' condition 'IPV6 Compression running out of bits for this particular prefix'

[Konrad Kulikowski]

Does anobody know how to investigate and solve this problem with IPv6 & TCAM.

CRS IOS XR 5.3.3.

I can not apply ACL to interface because compression error.

Output :

RP/0/RP0/CPU0:CRS#conf t
Wed Dec 21 08:30:26.928 CET
RP/0/RP0/CPU0:CRS(config)#interface POS0/0/0/0
RP/0/RP0/CPU0:CRS(config-if)#ipv6 access-group IPv6_ACL ingress
RP/0/RP0/CPU0:CRS(config-if)#commit
Wed Dec 21 08:30:52.335 CET

% Failed to commit one or more configuration items during a pseudo-atomic operation. All changes made have been reverted. Please issue 'show configuration failed' from this session to view the errors
RP/0/RP0/CPU0:CRS(config-if)#show configuration failed
Wed Dec 21 08:31:07.502 CET
!! SEMANTIC ERRORS: This configuration was rejected by
!! the system due to semantic errors. The individual
!! errors with each failed configuration command can be
!! found below.

interface POS0/0/0/0
ipv6 access-group IPv6_ACL ingress
!!% 'tcam_mgr' detected the 'resource not available' condition 'IPV6 Compression running out of bits for this particular prefix'
!
end

[Konrad Kulikowski]

I alse see

LC/0/0/CPU0:Dec 21 08:30:52.384 CET: tcam_mgr[386]: %PKT_INFRA-TCAM_MGR_LIB-6-V6_CMPR_FAILED : v6 source prefix compression failed: Unable to add 110-th prefix 2a002220:00000000:00d500ac:00a00000 / 120 Try altering the prefix length or the prefix or use the compression anchor prefix CLI controller pse tcam location R/S/I compression ipv6 anchor-prefix to configure the corresponding anchor-prefix 120. If a /128 prefix has failed, please reduce the value of the highest anchor-prefix in the current configuration. retval -512

Should I configure

controller pse tcam location 0/0/CPU0 compression ipv6 anchor-prefix 120

?

Does this command affect any traffic on this linecard ?

[Konrad Kulikowski]

This ACL is not large or complicated

Looks like this ( I've changed prefixes )

ipv6 access-list ACL_IPv6

10 permit icmpv6 any any
30 permit ipv6 xxxx::xxxx::xx:xx:a0:0/120 any
40 permit ipv6 xxxx::xxxx::xx:xx:aa:0/120 any
50 permit ipv6 xxxx::xxxx::xx:xx:b9:0/120 any
60 permit ipv6 xxxx::xxxx::xx:xx:ba:0/120 any
70 permit ipv6 xxxx::xxxx::xx:xx:bb:0/120 any
80 permit ipv6 xxxx::xxxx::xx:xx:bc:0/120 any
90 permit ipv6 xxxx::xxxx::xx:xx:bd:0/120 any
100 permit ipv6 xxxx::xxxx::xx:xx:be:0/120 any
110 permit ipv6 xxxx::xxxx::xx:xx:1e:0/120 any
120 permit ipv6 xxxx::xxxx::xx:xx:1f:0/120 any
130 permit ipv6 xxxx::xxxx::xx:xx:c0:0/120 any
140 permit ipv6 xxxx::xxxx::xx:xx:c8:0/120 any
150 permit ipv6 xxxx::xxxx::xx:xx:c9:0/120 any
160 permit ipv6 xxxx::xxxx::xx:xx:ca:0/120 any
170 permit ipv6 xxxx::xxxx::xx:xx:cb:0/120 any
300 deny ipv6 any xxxx::xxxx::xx:xx:a0:0/120
310 deny ipv6 any xxxx::xxxx::xx:xx:aa:0/120
320 deny ipv6 any xxxx::xxxx::xx:xx:b9:0/120
330 deny ipv6 any xxxx::xxxx::xx:xx:ba:0/120
340 deny ipv6 any xxxx::xxxx::xx:xx:bb:0/120
350 deny ipv6 any xxxx::xxxx::xx:xx:bc:0/120
360 deny ipv6 any xxxx::xxxx::xx:xx:bd:0/120
370 deny ipv6 any xxxx::xxxx::xx:xx:be:0/120
380 deny ipv6 any xxxx::xxxx::xx:xx:1e:0/120
390 deny ipv6 any xxxx::xxxx::xx:xx:1f:0/120
400 deny ipv6 any xxxx::xxxx::xx:xx:c0:0/120
410 deny ipv6 any xxxx::xxxx::xx:xx:c8:0/120
420 deny ipv6 any xxxx::xxxx::xx:xx:c9:0/120
430 deny ipv6 any xxxx::xxxx::xx:xx:ca:0/120
440 deny ipv6 any xxxx::xxxx::xx:xx:cb:0/120

500 permit ipv6 any any