HIgh CPU Due to Interupt

[Malik Muhammad Jawad]

Hi All,

I has an issue of instantaneous High CPU Usage on one of my Cisco 7609-s running Version 12.2(33)SRE12.

there is no abnormality observed on Process of show Process CPU and also not found in hardware constraints of the device.

Below are the output if someone can help.

7609-s#show proces cpu | e 0.00
CPU utilization for five seconds: 94%/89%; one minute: 94%; five minutes: 94%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
7 38880904 2302754 16884 2.41% 0.49% 0.44% 0 Check heaps
88 1697768 583669 2908 0.08% 0.03% 0.02% 0 Compute load avg
94 1486832 11739720 126 0.08% 0.04% 0.05% 0 TDP Hello
188 2085644 166613858 12 0.08% 0.07% 0.07% 0 ACE Tunnel Task
220 41295308 77856053 530 0.40% 0.86% 1.17% 0 IP Input
255 3687876 633096467 5 0.24% 0.21% 0.20% 0 Ethernet Msec Ti
312 2133076 5380501 396 0.08% 0.04% 0.03% 0 CDP Protocol
557 1928356 160732729 11 0.08% 0.09% 0.08% 0 PPP manager
558 2277480 160732727 14 0.08% 0.08% 0.08% 0 PPP Events
561 7563064 530196 14264 0.16% 0.08% 0.07% 0 MFI LFD Stats Pr
569 4036276 7985666 505 0.16% 0.08% 0.08% 0 RSVP
577 4578364 635786091 7 0.24% 0.25% 0.24% 0 IP SLAs Event Pr
578 10649672 47151681 225 0.16% 0.07% 0.08% 0 IP SNMP
579 2898716 21193932 136 0.08% 0.02% 0.01% 0 PDU DISPATCHER
580 27911292 44418195 628 0.24% 0.40% 1.21% 0 SNMP ENGINE  

7609-s#show stacks
Minimum process stacks:
Free/Size Name
5552/6000 OIR IOS Process
5532/6000 ISSU Infra API Delayed Registration Process
4268/6000 IPC ISSU Versioning Process
3508/6000 IPC ISSU Receive Process
5220/6000 IPC Zone Manager
5320/6000 ICC Retry Q
3240/6000 IPC Split Init
4292/6000 RTTY Slave Registration Process
3852/6000 PF ISSU PRST media read proc
4928/6000 red mode process
3536/6000 ICC Nego Client
3944/6000 snmp_issu_process
5324/6000 CDP BLOB
2144/6000 c6k ivrfs
10768/12000 MRIB IPv6 Init Process
11256/12000 MRIB IPv4 Init Process
5120/6000 ICC Slave Comp. Up
3396/6000 eobc_init_process
4932/6000 DRMI Slave Registration Process
4904/6000 DRMI Config Dispatcher
5048/6000 PM MP Process
4896/6000 EARL INFO CAPABILITY process
4884/6000 XDR RRP delayed init
4284/6000 RFS ISSU Nego Process
7476/12000 RFSS server global process
10852/12000 RFSS worker process
5048/6000 Low Batt Process
5044/6000 C6K ENV RP init
5044/6000 deinit_rcsf
5000/6000 SPAN Subsystem
10924/12000 MFIB RP IPC
4264/6000 MRIB LC IPC Port Registration Proc
5048/6000 SASL MAIN
10752/12000 Router Init
53996/60000 EEM TCL Proc
53496/60000 EEM Auto Registration Proc
7920/12000 Init
11032/12000 cdp init process
4988/6000 URPF stats
4836/6000 RADIUS INITCONFIG
5048/6000 boot string oir process
2044/3000 Rom Random Update Process
5016/6000 Link Status process
Minimum process stacks:
Free/Size Name
4992/6000 Track
11016/12000 IP SLA Responder
4992/6000 EFP IPC rcv msgQ
4936/6000 EFP IPC msg holdq
4100/6000
10780/12000 RFS server process
3684/6000 IPC Mcast Pending Action
5180/6000 SCP async: Draco-LC2
5196/6000 XDR LC PRIO Critcal Back
11200/12000 CFC LC Test Stats
11280/12000 CFC stats broker process
4948/6000 XDR LC PRIO Background
4808/6000 CEF LC Stats
5312/6000 CEF Post-Switchover Tidy
8276/12000 XDR LC Background
4284/6000 RTTY Client Registration
7000/12000 Standby service handler process
4908/6000 DRMI Master Reg. Slave Process
5328/6000 AAA HA Acct Proc
4836/6000 IPC LC Port Opener
5260/6000 MPLS ACL RP CFG Background
5316/6000 Data descriptor monitor
3060/6000 IfIdx Reclaim
9196/12000 draco-oir:slot 5
4136/6000 moduleTrap Generation Process
9504/12000 draco-oir:slot 6
9996/12000 draco-oir:slot 2
9504/12000 draco-oir:slot 4
7560/12000 draco-oir:slot 3
9504/12000 draco-oir:slot 7
9504/12000 draco-oir:slot 8
9500/12000 draco-oir:slot 1
5328/6000 cfib_tunnel swover process
4996/6000 ipc apps swover process
5032/6000 Draco DFS Port Registation Proc
10260/12000 RF Net 2 Process
5200/6000 BGP Accepter
3292/6000 rf_cc_clear_counter_process
3540/6000 BGP Open
10228/12000 RF Net Background
5296/6000 ATMHA Background Process
5284/6000 CEMHA Background Process
5280/6000 Enhanced Timers Process
4604/6000 SLB RF Active Proc
33492/36000 TCP Command
Minimum process stacks:
Free/Size Name
4544/6000 Peer Comm Status Changed
3624/6000 IfIndex Bulk Sync
3804/6000 CONFIG SYNC PLATFORM SYNC PROCESS
4208/6000 pf_cs_startup_config_process
5228/6000 SNMP Platform per-sec Job
4556/6000 SNMP MIB Platform Sync
4736/6000 QOS-HA Bulk Sync Process
2304/3000 Access Client HA Handler Proc
4780/6000 LCC Configure
5052/6000 CWAN BULK SYNC RF Timer Extension
4708/6000 Tableid HA Bulk Sync
4444/6000 CWAN LTL Mgr HA Process
5108/6000 DOT1X HA Timer Ext
7780/12000 RF Send Bulk Sync ExtProgTimer
4084/6000 RF ARCHIVE ISSU Nego Process
4084/6000 RF ROLLBACK ISSU Nego Process
5224/6000 SNMP Filesys per-sec Job
3328/6000 SNMP IfTable Copy
5068/6000 MWAM FILE SYS SYNC
5068/6000 SAMI FILE SYS SYNC
5032/6000 L3MM bulk sync
1836/3000 QM HA Process on Active RP
5052/6000 CWAN VLAN RF Timer Extension
5008/6000 PIM HA bulk sync
4788/6000 RF Network sendbulk
5224/6000 SNMP Bulk per-sec Job
5056/6000 CWAN APS RF Timer Extension
5092/6000 CEM HA RF Timer Extension
5092/6000 ARP HA RF Timer Extension
5060/6000 SLB Bulk Sync
4924/6000 Call home Bulk Sync Timer
4908/6000 CWAN ATOM HA Process
5092/6000 Netclk HA sync timer extension
4460/6000 RF ARCHIVE Sync Process
5028/6000 RF ROLLBACK Sync Process
4316/6000 SNMP MIB Bulk Sync
4804/6000 CONFIG SYNC VERIFICATION
2340/6000 FTP Write Process
5696/12000 Virtual Exec
3832/6000 TFTP Server
17820/24000 show techsupport huge_stack

Interrupt level stacks:
Level Called Unused/Size Name
1 953329649 4848/9000 dma Intr handler

Interrupt level stacks:
Level Called Unused/Size Name
2 546316235 6432/9000 eobc etsec1 tx interrupt
3 0 9000/9000 Low Battery Interrupt
4 4773446 8932/9000 16550 Con/Aux Interrupt
5 0 9000/9000 SP to RP Interrupt
6 134385057 8928/9000 Timebase Reference Interrupt
7 1297825298 8744/9000 M8500_TIMER_INTERRUPT

Spurious interrupts: 34845

***************************************************
******* Information of Last System Crash **********
***************************************************

Using bootdisk:crashinfo.

%Error opening bootdisk:crashinfo (File not found)

7609-s#show cef drop
% Command accepted but obsolete, see 'show (ip|ipv6) cef switching statistics [feature]'

IPv4 CEF Drop Statistics
Slot Encap_fail Unresolved Unsupported No_route No_adj ChkSum_Err
RP 0 0 11732661 122281 723361 0
7/0 0 0 0 0 0 0
4/0 0 0 0 0 0 0
8/0 0 0 0 0 0 0
3/0 0 0 0 0 0 0
1/0 0 0 0 0 0 0
6/0 0 0 0 0 0 0
2/0 0 0 0 0 0 0
5/0 0 0 0 0 0 0
5/1 0 0 0 0 0 0

7609-s#show platform hardware capacity forwarding
L2 Forwarding Resources
MAC Table usage: Module Collisions Total Used %Used
1 0 98304 767 1%
3 0 98304 729 1%
4 0 98304 733 1%
5 0 98304 769 1%
6 0 98304 738 1%
7 0 98304 766 1%
8 0 98304 767 1%

VPN CAM usage: Total Used %Used
512 0 0%
L3 Forwarding Resources
Module FIB TCAM usage: Total Used %Used
1 72 bits (IPv4, MPLS, EoM) 524288 6332 1%
144 bits (IP mcast, IPv6) 262144 9 1%

detail: Protocol Used %Used
IPv4 2190 1%
MPLS 4142 1%
EoM 0 0%

IPv6 2 1%
IPv4 mcast 4 1%
IPv6 mcast 3 1%

Adjacency usage: Total Used %Used
1048576 2333 1%
L3 Forwarding Resources
Module FIB TCAM usage: Total Used %Used
3 72 bits (IPv4, MPLS, EoM) 524288 6287 1%
144 bits (IP mcast, IPv6) 262144 9 1%

detail: Protocol Used %Used
IPv4 2190 1%
MPLS 4097 1%
EoM 0 0%

IPv6 2 1%
IPv4 mcast 4 1%
IPv6 mcast 3 1%

Adjacency usage: Total Used %Used
1048576 2288 1%
L3 Forwarding Resources
Module FIB TCAM usage: Total Used %Used
4 72 bits (IPv4, MPLS, EoM) 524288 6287 1%
144 bits (IP mcast, IPv6) 262144 9 1%

detail: Protocol Used %Used
IPv4 2190 1%
MPLS 4097 1%
EoM 0 0%

IPv6 2 1%
IPv4 mcast 4 1%
IPv6 mcast 3 1%

Adjacency usage: Total Used %Used
1048576 2288 1%
L3 Forwarding Resources
Module FIB TCAM usage: Total Used %Used
5 72 bits (IPv4, MPLS, EoM) 524288 6287 1%
144 bits (IP mcast, IPv6) 262144 9 1%

detail: Protocol Used %Used
IPv4 2190 1%
MPLS 4097 1%
EoM 0 0%

IPv6 2 1%
IPv4 mcast 4 1%
IPv6 mcast 3 1%

Adjacency usage: Total Used %Used
1048576 2286 1%
L3 Forwarding Resources
Module FIB TCAM usage: Total Used %Used
6 72 bits (IPv4, MPLS, EoM) 524288 6287 1%
144 bits (IP mcast, IPv6) 262144 9 1%

detail: Protocol Used %Used
IPv4 2190 1%
MPLS 4097 1%
EoM 0 0%

IPv6 2 1%
IPv4 mcast 4 1%
IPv6 mcast 3 1%

Adjacency usage: Total Used %Used
1048576 2289 1%
L3 Forwarding Resources
Module FIB TCAM usage: Total Used %Used
7 72 bits (IPv4, MPLS, EoM) 524288 6287 1%
144 bits (IP mcast, IPv6) 262144 9 1%

detail: Protocol Used %Used
IPv4 2190 1%
MPLS 4097 1%
EoM 0 0%

IPv6 2 1%
IPv4 mcast 4 1%
IPv6 mcast 3 1%

Adjacency usage: Total Used %Used
1048576 2288 1%
L3 Forwarding Resources
Module FIB TCAM usage: Total Used %Used
8 72 bits (IPv4, MPLS, EoM) 524288 6287 1%
144 bits (IP mcast, IPv6) 262144 9 1%

detail: Protocol Used %Used
IPv4 2190 1%
MPLS 4097 1%
EoM 0 0%

IPv6 2 1%
IPv4 mcast 4 1%
IPv6 mcast 3 1%

Adjacency usage: Total Used %Used
1048576 2288 1%

Forwarding engine load:
Module pps peak-pps peak-time
1 712466 1730086 22:52:00 GMT Wed Mar 20 2019
3 0 1462 17:51:37 GMT Fri Mar 8 2019
4 86967 1483519 22:51:46 GMT Tue Feb 12 2019
5 91062 105359 21:52:53 GMT Sun Mar 17 2019
6 79243 106053 17:21:20 GMT Wed Feb 13 2019
7 96709 329639 12:07:56 GMT Sat Mar 9 2019
8 33517 278685 12:07:55 GMT Sat Mar 9 2019

7609-s#show mls cef exception status
Current IPv4 FIB exception state = FALSE
Current IPv6 FIB exception state = FALSE
Current MPLS FIB exception state = FALSE

7609-s#show ip route summary
IP routing table name is default (0x0)
IP routing table maximum-paths is 32
Route Source Networks Subnets Replicates Overhead Memory (bytes)
static 0 21 0 1860 3612
connected 0 43 0 2860 7396
ospf 38547 29 1834 0 113040 327888
Intra-area: 584 Inter-area: 78 External-1: 43 External-2: 1136
NSSA External-1: 0 NSSA External-2: 22
bgp 38547 0 0 0 0 0
External: 0 Internal: 0 Local: 0
internal 69 95104
Total 98 1898 0 117760 434000

7609-s#show mls stat

Statistics for Earl in Module 1

L2 Forwarding Engine
Total packets Switched : 6949499216053

L3 Forwarding Engine
Total packets Processed : 3895292331060 @ 698279 pps
Total packets L3 Switched : 2643218322114 @ 478943 pps

Total Packets Bridged : 1204442166
Total Packets FIB Switched : 2643218322114
Total Packets ACL Routed : 0
Total Packets Netflow Switched : 0
Total Mcast Packets Switched/Routed : 5519519
Total ip packets with TOS changed : 21
Total ip packets with COS changed : 4114721794
Total non ip packets COS changed : 2003468909
Total packets dropped by ACL : 40586
Total packets dropped by Policing : 18925877
Total packets exceeding CIR : 18925877
Total packets exceeding PIR : 0

Errors
MAC/IP length inconsistencies : 0
Short IP packets received : 0
IP header checksum errors : 0
No-route packet drops : 5
TTL failures : 1630191
MTU failures : 6667285

Statistics for Earl in Module 3

L2 Forwarding Engine
Total packets Switched : 81043171

L3 Forwarding Engine
Total packets Processed : 1934176 @ 0 pps
Total packets L3 Switched : 672964 @ 0 pps

Total Packets Bridged : 259444
Total Packets FIB Switched : 672963
Total Packets ACL Routed : 0
Total Packets Netflow Switched : 1
Total Mcast Packets Switched/Routed : 8
Total ip packets with TOS changed : 0
Total ip packets with COS changed : 21
Total non ip packets COS changed : 321668
Total packets dropped by ACL : 0
Total packets dropped by Policing : 0
Total packets exceeding CIR : 0
Total packets exceeding PIR : 0

Errors
MAC/IP length inconsistencies : 0
Short IP packets received : 0
IP header checksum errors : 0
No-route packet drops : 0
TTL failures : 55
MTU failures : 264174

Statistics for Earl in Module 4

L2 Forwarding Engine
Total packets Switched : 1757123108713

L3 Forwarding Engine
Total packets Processed : 1124244560541 @ 85554 pps
Total packets L3 Switched : 989184786673 @ 13193 pps

Total Packets Bridged : 1076314
Total Packets FIB Switched : 989184786672
Total Packets ACL Routed : 0
Total Packets Netflow Switched : 1
Total Mcast Packets Switched/Routed : 4038783
Total ip packets with TOS changed : 151830244393
Total ip packets with COS changed : 2
Total non ip packets COS changed : 0
Total packets dropped by ACL : 14113
Total packets dropped by Policing : 50886861
Total packets exceeding CIR : 50886861
Total packets exceeding PIR : 0

Errors
MAC/IP length inconsistencies : 0
Short IP packets received : 0
IP header checksum errors : 0
No-route packet drops : 1
TTL failures : 445734
MTU failures : 0

Statistics for Earl in Module 6

L2 Forwarding Engine
Total packets Switched : 205712192060

L3 Forwarding Engine
Total packets Processed : 99326315006 @ 73677 pps
Total packets L3 Switched : 23400514643 @ 7854 pps

Total Packets Bridged : 74836307469
Total Packets FIB Switched : 23400514643
Total Packets ACL Routed : 0
Total Packets Netflow Switched : 0
Total Mcast Packets Switched/Routed : 10456761
Total ip packets with TOS changed : 14
Total ip packets with COS changed : 6712498351
Total non ip packets COS changed : 321666
Total packets dropped by ACL : 186
Total packets dropped by Policing : 1456939
Total packets exceeding CIR : 1456939
Total packets exceeding PIR : 0

Errors
MAC/IP length inconsistencies : 0
Short IP packets received : 0
IP header checksum errors : 0
No-route packet drops : 4
TTL failures : 12439
MTU failures : 171

Statistics for Earl in Module 7

L2 Forwarding Engine
Total packets Switched : 479213863739

L3 Forwarding Engine
Total packets Processed : 462523668415 @ 93502 pps
Total packets L3 Switched : 9131369238 @ 2436 pps

Total Packets Bridged : 450441346712
Total Packets FIB Switched : 9131369237
Total Packets ACL Routed : 0
Total Packets Netflow Switched : 1
Total Mcast Packets Switched/Routed : 51224635
Total ip packets with TOS changed : 127622622
Total ip packets with COS changed : 59011971
Total non ip packets COS changed : 0
Total packets dropped by ACL : 2941191
Total packets dropped by Policing : 15013
Total packets exceeding CIR : 15013
Total packets exceeding PIR : 0

Errors
MAC/IP length inconsistencies : 4541
Short IP packets received : 0
IP header checksum errors : 16
No-route packet drops : 215448
TTL failures : 9600386
MTU failures : 0

Statistics for Earl in Module 8

L2 Forwarding Engine
Total packets Switched : 388506324681

L3 Forwarding Engine
Total packets Processed : 229809010081 @ 34158 pps
Total packets L3 Switched : 175147012148 @ 34009 pps

Total Packets Bridged : 54076714628
Total Packets FIB Switched : 175147012147
Total Packets ACL Routed : 0
Total Packets Netflow Switched : 1
Total Mcast Packets Switched/Routed : 4889168
Total ip packets with TOS changed : 992943983
Total ip packets with COS changed : 164563338
Total non ip packets COS changed : 0
Total packets dropped by ACL : 610514
Total packets dropped by Policing : 0
Total packets exceeding CIR : 0
Total packets exceeding PIR : 0

Errors
MAC/IP length inconsistencies : 1389
Short IP packets received : 0
IP header checksum errors : 2
No-route packet drops : 2454813
TTL failures : 547410
MTU failures : 0

Total packets L3 Processed by all Modules: 5811197819279 @ 985170 pps

[Malik Muhammad Jawad]

Hi All,

Can anybody help me on this ??

[Evgeniy Prichinin]

Hello, you can use netdr to dump traffic directed to CPU. After that may be you get an idea about configuration that cause high cpu load.

[Malik Muhammad Jawad]

Hi 

Thanks fo the commen, but I checked multiple times netdr but not fruitful as all the times I got packet of my local cache servers which are captured in CPU processing

[Evgeniy Prichinin]

What kind of cache server do you use?

In what way traffic is directed to cache server ? PBR ?

[Malik Muhammad Jawad]

we have two servers of Google GGC and Facebook cache server.

there is no PBR on the device.

[Evgeniy Prichinin]

Could you please show some packets captured by netdr ?

[Malik Muhammad Jawad]

Here are some netdr logs for reference.

[Evgeniy Prichinin]

show ip traffic
show int Po8 switching
show int Te1/0/1 switching
show run int po8
show run int te1/0/1
show run int vlan4085
show run int vlan4035

btw.. there are a lot of 

TTL failures
MTU failures
No-route packet drops

do you have

mls rate-limit all ttl-failure 100 10 

mls rate-limit all mtu-failure 100 10 in config?

[Malik Muhammad Jawad]

P#show ip traffic
IP statistics:
Rcvd: 2481665269 total, 102230710 local destination
0 format errors, 0 checksum errors, 8688417 bad hop count
12 unknown protocol, 321 not a gateway
0 security failures, 0 bad options, 4571784 with options
Opts: 225 end, 0 nop, 0 basic security, 0 loose source route
0 timestamp, 0 extended security, 224 record route
0 stream ID, 0 strict source route, 4571559 alert, 0 cipso, 0 ump
0 other
Frags: 6 reassembled, 2 timeouts, 1 couldn't reassemble
3774600 fragmented, 943 couldn't fragment
Bcast: 2779348 received, 0 sent
Mcast: 16037408 received, 20354562 sent
Sent: 128122953 generated, 2939740192 forwarded
Drop: 5504 encapsulation failed, 0 unresolved, 0 no adjacency
61692 no route, 0 unicast RPF, 0 forced drop, 0 unsupported-addr
0 options denied, 0 source IP address zero

ICMP statistics:
Rcvd: 1074 format errors, 119 checksum errors, 3 redirects, 144913 unreachable
10607111 echo, 1765 echo reply, 0 mask requests, 0 mask replies, 0 quench
0 parameter, 107 timestamp, 0 info request, 0 other
0 irdp solicitations, 0 irdp advertisements
Sent: 0 redirects, 2110030 unreachable, 672268 echo, 10607111 echo reply
0 mask requests, 0 mask replies, 0 quench, 107 timestamp
0 info reply, 8088012 time exceeded, 0 parameter problem
0 irdp solicitations, 0 irdp advertisements

BGP statistics:
Rcvd: 975965 total, 8779 opens, 23 notifications, 41565 updates
925598 keepalives, 0 route-refresh, 0 unrecognized
Sent: 986030 total, 8781 opens, 8772 notifications, 0 updates
968477 keepalives, 0 route-refresh

EIGRP-IPv4 statistics:
Rcvd: 0 total
Sent: 0 total

TCP statistics:
Rcvd: 8052068 total, 7214 checksum errors, 477894 no port
Sent: 4989469 total

PIMv2 statistics: Sent/Received
Total: 0/0, 0 checksum errors, 0 format errors
Registers: 0/0 (0 non-rp, 0 non-sm-group), Register Stops: 0/0, Hellos: 0/0

P#how int Po8 switching
^
% Invalid input detected at '^' marker.

P#show int Te1/0/1 switching
TenGigabitEthernet1/0/1 *** LHR-AGG-2-10GE-1/0/1 -- LHR-AGG-1-10GE-1/0/1 ***
Throttle count 0
Drops RP 475 SP 0
SPD Flushes Fast 475 SSE 0
SPD Aggress Fast 0
SPD Priority Inputs 6074478 Drops 0

Protocol IP
Switching path Pkts In Chars In Pkts Out Chars Out
Process 19357183 2172176958 55767940 63210021380
Cache misses 0 - - -
Fast 19273218 1630742985 79016928327 107912828886608
Auton/SSE 401129246188 256570494550158 1036426594044 740912942900095

Protocol ARP
Switching path Pkts In Chars In Pkts Out Chars Out
Process 309 18540 311 29856
Cache misses 0 - - -
Fast 0 0 0 0
Auton/SSE 0 0 0 0

Protocol CDP
Switching path Pkts In Chars In Pkts Out Chars Out
Process 75519 34059069 76449 37230663
Cache misses 0 - - -
Fast 0 0 0 0
Auton/SSE 0 0 0 0

Protocol MPLS
Switching path Pkts In Chars In Pkts Out Chars Out
Process 480 399630 2271062 278820376
Cache misses 0 - - -
Fast 1183 598942 301339 149693758
Auton/SSE 20503950 3476017123 141813390477 30588661509135

NOTE: all counts are cumulative and reset only after a reload.
P#show run int po8
Building configuration...

Current configuration : 285 bytes
!
interface Port-channel8
description *** LHR-AGG-2-Po-8 -- LHR-IGW-2-Po-5 ***
ip address 10.2.1.25 255.255.255.252
ip ospf message-digest-key 1 md5 7 111D272D12074D0F2E
ip ospf network point-to-point
ip ospf cost 1
load-interval 30
hold-queue 4096 in
hold-queue 4096 out
end

P#show run int te1/0/1
Building configuration...

Current configuration : 460 bytes
!
interface TenGigabitEthernet1/0/1
description *** LHR-AGG-2-10GE-1/0/1 -- LHR-AGG-1-10GE-1/0/1 ***
dampening
mtu 9180
ip address 10.4.0.58 255.255.255.252
no ip redirects
no ip proxy-arp
ip ospf message-digest-key 1 md5 7 00102D2E014E4D0525
ip ospf network point-to-point
load-interval 30
carrier-delay msec 0
mpls ip
mpls traffic-eng tunnels
mls qos trust dscp
hold-queue 4096 in
ip rsvp bandwidth percent 95
ip rsvp signalling dscp 40
end

P#show run int vlan4085
^
% Invalid input detected at '^' marker.

P#show run int vlan4035
^
% Invalid input detected at '^' marker.

[Malik Muhammad Jawad]

Hi 

we also dont  have below two configured either at our device.

mls rate-limit all ttl-failure 100 10 

mls rate-limit all mtu-failure 100 10 in config?

[Malik Muhammad Jawad]

Hi,

attached is recent Netdr.

please can you help how to check,

TTL failures
MTU failures
No-route packet drops

as i am unable to check any failure.

[Evgeniy Prichinin]

Output of command show mls stat shows a lot of errors related to MTU.

Also you can add 

no ip redirects
no ip proxy-arp

no ip unreachable 

to all L3 interfaces.

[Malik Muhammad Jawad]

Dear 

All three command has been placed under all L3 physical interface

---

@Evgeniy Prichinin wrote:

Output of command show mls stat shows a lot of errors related to MTU.

Also you can add 

no ip redirects
no ip proxy-arp

no ip unreachable 

to all L3 interfaces.

---

but still the CPU is getting high.