04-05-2010 04:39 AM - edited 03-06-2019 10:27 AM
Hello:
I have one Cat6k switch running 12.2(18)SXF13.But I see the following error msgs in th log.
Mar 28 21:18:57.155 MEDT: %MLSCEF-SP-4-FIB_EXCEPTION_THRESHOLD: Hardware CEF entry usage is at 95% capacity for MPLS protocol.
Mar 28 22:18:59.260 MEDT: %MLSCEF-SP-4-FIB_EXCEPTION_THRESHOLD: Hardware CEF entry usage is at 95% capacity for MPLS protocol.
Mar 28 23:19:03.572 MEDT: %MLSCEF-SP-4-FIB_EXCEPTION_THRESHOLD: Hardware CEF entry usage is at 95% capacity for MPLS protocol.
Mar 29 00:19:07.028 MEDT: %MLSCEF-SP-4-FIB_EXCEPTION_THRESHOLD: Hardware CEF entry usage is at 95% capacity for MPLS protocol.
Mar 29 01:19:15.348 MEDT: %MLSCEF-SP-4-FIB_EXCEPTION_THRESHOLD: Hardware CEF entry usage is at 95% capacity for MPLS protocol.
Mar 29 02:19:15.892 MEDT: %MLSCEF-SP-4-FIB_EXCEPTION_THRESHOLD: Hardware CEF entry usage is at 95% capacity for MPLS protocol.
Mar 29 03:19:19.844 MEDT: %MLSCEF-SP-4-FIB_EXCEPTION_THRESHOLD: Hardware CEF entry usage is at 95% capacity for MPLS protocol.
------------------ show module ------------------
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 6 Firewall Module WS-SVC-FWM-1 SAD1206018E
2 1 Application Control Engine Module ACE20-MOD-K9 SAD120705B7
3 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX SAL1219PY4P
5 2 Supervisor Engine 720 (Active) WS-SUP720-3B SAL1202CNVA
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
1 001e.f72b.239e to 001e.f72b.23a5 4.2 7.2(1) 3.2(7) Ok
2 001e.4a6f.d0f0 to 001e.4a6f.d0f7 2.3 8.7(0.22)ACE A2(1.3) Ok
3 001f.9e0f.8cac to 001f.9e0f.8cdb 2.7 12.2(14r)S5 12.2(18)SXF1 Ok
5 001a.2f3c.ab40 to 001a.2f3c.ab43 5.6 8.5(2) 12.2(18)SXF1 Ok
Mod Sub-Module Model Serial Hw Status
---- --------------------------- ------------------ ----------- ------- -------
3 Centralized Forwarding Card WS-F6700-CFC SAL1218P68B 4.0 Ok
5 Policy Feature Card 3 WS-F6K-PFC3BXL SAL123302XN 1.9 Ok
5 MSFC3 Daughterboard WS-SUP720 SAL1202CQ3Q 3.1 Ok
show mls cef summary
Total routes: 523869
IPv4 unicast routes: 267309
IPv4 Multicast routes: 3
MPLS routes: 256555<<<<<<<
IPv6 unicast routes: 2
IPv6 multicast routes: 0
EoM routes: 0
Can you please throw some lights on this issue ? Do you think it is a bug ? or hw issue.
I do see the following buf which looks bit similar but need some more info.
CSCsm27567
04-05-2010 05:21 AM
Hi,
Check out the below link for more info about the error message
http://www.ciscopowered.info/en/US/docs/ios/12_2sr/system/messages/sm2sr05.html
Hope to Help !!
Ganesh.H
Remember to rate the helpful post
04-08-2010 04:59 AM
Hello Ganesh :
Thanks for the reply.
The msl maximun router is 512K
pz-c6509-1#sh mls cef maximum-routes
FIB TCAM maximum routes :
=======================
Current :-
-------
IPv4 + MPLS - 512k (default)
IPv6 + IP Multicast - 256k (default)
I can change the MPLS table size. But can you please tell me how MPLS routes are being propagated in customer routers and it is giving
FIB exception errors?
Regards
Arjun
04-08-2010 05:16 AM
Hello Arjun,
>> But can you please tell me how MPLS routes are being propagated in customer routers and it is giving
FIB exception errors?
the message advices that the CEF table is near to full.
This has an impact on forwarding plane = how traffic is processed
This does not mean that BGP routes or MPLS label bindings are not passed to other devices that is part of signalling plane.
It means that if number of MPLS entries increase over maximum part of traffic will be process switched causing cpu to go to 100%.
By the way you have more then 256,000 MPLS routes it may be time to implement LDP label filtering
example of LDP label filtering:
sh run | inc advertise
no mpls ldp advertise-labels
mpls ldp advertise-labels for PREFIX-LDP-out
sh ip access-lists PREFIX-LDP-out
Standard IP access list PREFIX-LDP-out
10 permit 10.80.0.0, wildcard bits 0.0.255.255 (1718 matches)
the only needed labels are those of loopbacks
Hope to help
Giuseppe
04-08-2010 05:44 AM
Hello Giuseppe :
Thanks for the reply. But in this Cat6k we do not run MPLS. So the question is how MPLS table is being exhausted? What I have found is
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