07-23-2012 04:41 AM - edited 03-04-2019 05:02 PM
Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 15.1(4)M2, RELEASE SOFTWARE (fc1)
When the client on a Branch Office LAN realizes calls to skype, there is a sharp loading of CPU on Branch router Cisco1841 (all Inet traffic goes through DMVPN-Tunnel Interface to proxy on Central Office).
CPU utilization for five seconds: 89%/81%; one minute: 44%; five minutes: 41%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
121 30971272 10952019 2827 6.65% 5.59% 5.75% 0 IP Input
2 125984 229295 549 1.28% 0.12% 0.10% 0 Load Meter
96 1774568 141763543 12 0.64% 0.75% 0.78% 0 Ethernet Msec Ti
117 515872 35077439 14 0.56% 0.17% 0.16% 0 IPAM Manager
336 2617980 276339056 9 0.48% 1.70% 1.79% 0 IP SLAs Responde
203 929984 275753650 3 0.24% 0.79% 0.86% 0 HQF Shaper Backg
330 796120 55876200 14 0.16% 0.26% 0.28% 0 MFIB_mrib_write
314 414120 11711507 35 0.08% 0.12% 0.10% 0 IGMP Input
315 966264 25445473 37 0.08% 0.21% 0.23% 0 PIM Process
240 278164 35693249 7 0.08% 0.09% 0.08% 0 MMON MENG
TLLN-CE1#sh ip flow top-talkers
SrcIf SrcIPaddress DstIf DstIPaddress Pr SrcP DstP Bytes
Tu253 10.101.0.20 Vl1 10.108.1.32 06 1F90 C709 6974K
Tu253 10.101.0.20 Vl1 10.108.1.32 06 1F90 C72E 3289K
Vl1 10.108.1.32 Tu254* 10.101.0.20 06 C709 1F90 1568K
Tu254 10.100.0.14 Vl1 10.108.1.34 06 0D3D 0408 1311K
Tu253 10.101.1.233 Vl1 10.108.1.37 06 0D3D 040A 541K
5 of 5 top talkers shown. 44 flows processed.
FastEthernet 0/0 - WAN Interface (for Tunnel Source):
TLLN-CE1#sh int f0/0
FastEthernet0/0 is up, line protocol is up
Hardware is Gt96k FE, address is 58bc.2771.5f8e (bia 58bc.2771.5f8e)
Description: WAN
Internet address is x.x.x.x/y
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 254/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:13, output 00:00:00, output hang never
Last clearing of "show interface" counters 04:12:34
Input queue: 43/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/1000/0 (size/max total/drops)
30 second input rate 1909000 bits/sec, 244 packets/sec
30 second output rate 356000 bits/sec, 30 packets/sec
1875022 packets input, 808226627 bytes
Received 535 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
6431 input errors, 0 CRC, 0 frame, 0 overrun, 6431 ignored
0 watchdog
0 input packets with dribble condition detected
763186 packets output, 200182523 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
All Skype traffic application auto mark as DSCP EF, and then router applies the next outbound policy on WAN Fast0/0:
class-map match-any CLASS-VOICE
match ip dscp ef
!
...
!
policy-map POLICY-QOS-OUT
description *** Global QoS Policy ***
class CLASS-ROUTING
bandwidth percent 3
class CLASS-VOICE
priority percent 18
class CLASS-VIDEO-CONF
priority percent 15
class CLASS-STREAM-VIDEO
bandwidth percent 10
class CLASS-MISSION-CRIT
bandwidth percent 12
random-detect dscp-based
random-detect dscp 25 32 40
class CLASS-VOICE-CONTROL
bandwidth percent 2
class CLASS-TRANSACT
bandwidth percent 8
random-detect dscp-based
random-detect dscp 25 32 40
class CLASS-NETWORK-MGMT
bandwidth percent 2
class CLASS-BULK
bandwidth percent 8
random-detect dscp-based
random-detect ecn
random-detect dscp 25 32 40
class CLASS-SCAVENGER
bandwidth percent 10
class class-default
fair-queue
random-detect dscp-based
random-detect dscp 25 32 40
!
policy-map POLICY-INET-10M-OUT
class class-default
shape average 8500000 850000
service-policy POLICY-QOS-OUT
!
interface FastEthernet0/0
description WAN
ip address x.x.x.x y.y.y.y
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
ip virtual-reassembly in
ip verify unicast reverse-path allow-self-ping 150
load-interval 30
duplex auto
speed auto
service-policy output POLICY-INET-10M-OUT
!
TLLN-CE1#sh ip traffic
IP statistics:
Rcvd: 102808 total, 3682 local destination
0 format errors, 0 checksum errors, 252 bad hop count
0 unknown protocol, 0 not a gateway
0 security failures, 0 bad options, 1337 with options
Opts: 0 end, 0 nop, 0 basic security, 0 loose source route
0 timestamp, 0 extended security, 0 record route
0 stream ID, 0 strict source route, 1337 alert, 0 cipso, 0 ump
0 other
Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble
90 fragmented, 180 fragments, 0 couldn't fragment
Bcast: 65 received, 1 sent
Mcast: 1476 received, 797 sent
Sent: 100833 generated, 451516 forwarded
Drop: 0 encapsulation failed, 0 unresolved, 0 no adjacency
0 no route, 0 unicast RPF, 0 forced drop
0 options denied
Drop: 0 packets with source IP address zero
Drop: 0 packets with internal loop back IP address
0 physical broadcast
Reinj: 0 in input feature path, 0 in output feature path
ICMP statistics:
Rcvd: 0 format errors, 0 checksum errors, 0 redirects, 190 unreachable
0 echo, 0 echo reply, 0 mask requests, 0 mask replies, 0 quench
0 parameter, 0 timestamp, 0 timestamp replies, 0 info request, 0 other
0 irdp solicitations, 0 irdp advertisements
0 time exceeded, 0 info replies
Sent: 0 redirects, 0 unreachable, 0 echo, 0 echo reply
0 mask requests, 0 mask replies, 0 quench, 0 timestamp, 0 timestamp replies
0 info reply, 0 time exceeded, 0 parameter problem
0 irdp solicitations, 0 irdp advertisements
TCP statistics:
Rcvd: 1018 total, 0 checksum errors, 0 no port
Sent: 1067 total
BGP statistics:
Rcvd: 0 total, 0 opens, 0 notifications, 0 updates
0 keepalives, 0 route-refresh, 0 unrecognized
Sent: 0 total, 0 opens, 0 notifications, 0 updates
0 keepalives, 0 route-refresh
EIGRP-IPv4 statistics:
Rcvd: 0 total
Sent: 0 total
PIMv2 statistics: Sent/Received
Total: 336/685, 0 checksum errors, 0 format errors
Registers: 0/0 (0 non-rp, 0 non-sm-group), Register Stops: 0/0, Hellos: 183/181
Join/Prunes: 105/352, Asserts: 1/105, grafts: 47/0
Bootstraps: 0/0, Candidate_RP_Advertisements: 0/0
Queue drops: 0
State-Refresh: 0/0
IGMP statistics: Sent/Received
Total: 299/713, Format errors: 0/0, Checksum errors: 0/0
Host Queries: 90/30, Host Reports: 209/358, Host Leaves: 0/0
DVMRP: 0/0, PIM: 0/0
Queue drops: 0
UDP statistics:
Rcvd: 907 total, 0 checksum errors, 41 no port
Sent: 974 total, 0 forwarded broadcasts
OSPF statistics:
Last clearing of OSPF traffic counters 00:29:47
Rcvd: 169 total, 0 checksum errors
125 hello, 0 database desc, 0 link state req
31 link state updates, 13 link state acks
Sent: 154 total
125 hello, 0 database desc, 0 link state req
17 link state updates, 12 link state acks
ARP statistics:
Rcvd: 367 requests, 0 replies, 0 reverse, 0 other
Sent: 0 requests, 239 replies (0 proxy), 0 reverse
Drop due to input queue full: 0
What can cause sharp loading of CPU? ...throughput performance 1841, it seems, allows to process traffic
Solved! Go to Solution.
07-23-2012 04:49 AM
You have some configuration complexity, try simplifying.
07-23-2012 04:49 AM
You have some configuration complexity, try simplifying.
07-24-2012 03:27 AM
Configuration optimum. When I apply shaping policy for Branch-client on CO-router (shape average 500k), then loading of Branch-router 1841 CPU became less...
07-26-2012 02:09 AM
Skype-client connect to virtual NLB IP Proxy (from two FTMG in cluster), if Skype-client connect to phisycal IP one of two FTMG-proxy, that problems with loading of CPU aren't present!
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: