[cisco-bba] High cpu -7200 vxr router --pppoe service

Tue Feb 17 09:59:51 EST 2009

I have and othe traffic at the router not pppoe .The users use local ip addresses .

I use virtual-template for pppoe:

interface GigabitEthernet0/2.161
 description VLAN Client PPPoE 
 encapsulation dot1Q 161
 ip address 192.168.160.1 255.255.252.0
 ip access-group 2261 in
 ip verify unicast source reachable-via rx allow-self-ping
 no ip redirects
 no ip unreachables
 ip mtu 1492
 ip flow ingress
 ip tcp adjust-mss 1452
 no snmp trap link-status
 pppoe enable group pppoevlan161
 no cdp enable
interface Virtual-Template161 
 mtu 1492
 ip unnumbered GigabitEthernet0/2.161
 ip access-group 2120 in
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip nat inside
 no ip virtual-reassembly
 ip tcp adjust-mss 1452
 peer default ip address pool pppoevlan161
 ppp mtu adaptive
 ppp authentication pap chap

bba-group pppoe pppoevlan161
 virtual-template 161
 sessions per-mac limit 1
 sessions per-vlan limit 1024

and policy -map to rate-limit the sessions of pppoe

7200pppoe uptime is 2 days, 3 hours, 10 minutes
System returned to ROM by error - an Illegal Opcode exception, PC 0x627CDC3C at 12:41:54 berlin Sun Feb 15 2009
System restarted at 12:43:49 berlin Sun Feb 15 2009
System image file is "disk2:c7200-adventerprisek9_sna-mz.124-6.T8.bin"

Cisco 7206VXR (NPE-G1) processor (revision B) with 229376K/32768K bytes of memory.
Processor board ID 35137631
SB-1 CPU at 700MHz, Implementation 1025, Rev 0.2, 512KB L2 Cache
6 slot VXR midplane, Version 2.11

7200pppoe#sh interfaces gigabitEthernet 0/1 

GigabitEthernet0/1 is up, line protocol is up 

MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, 

reliability 255/255, txload 5/255, rxload 19/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 1000Mb/s, media type is RJ45

output flow-control is XON, input flow-control is XON

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters never

Input queue: 3/75/17807/20660 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 75134000 bits/sec, 10936 packets/sec

5 minute output rate 20625000 bits/sec, 10210 packets/sec

1269817388 packets input, 2310656794 bytes, 3764 no buffer

Received 2840854 broadcasts, 0 runts, 0 giants, 550 throttles

370339 input errors, 0 CRC, 0 frame, 370339 overrun, 0 ignored

0 watchdog, 504336 multicast, 0 pause input

0 input packets with dribble condition detected

1204250871 packets output, 3152549467 bytes, 0 underruns

3 output errors, 0 collisions, 2 interface resets

0 babbles, 0 late collision, 0 deferred

3 lost carrier, 0 no carrier, 0 pause output

0 output buffer failures, 0 output buffers swapped out

7200pppoe#sh interfaces gigabitEthernet 0/1 swi

7200pppoe#sh interfaces gigabitEthernet 0/1 switching 

Throttle count 550

Drops RP 17807 SP 0

SPD Flushes Fast 20660 SSE 0

SPD Aggress Fast 0

SPD Priority Inputs 2510012 Drops 55

Protocol IP 

Switching path Pkts In Chars In Pkts Out Chars Out

Process 21843334 190564023 12165257 1122868263

Cache misses 225 - - -

Fast 1245777776 2254484546 1192153063 2053685951

Auton/SSE 0 0 0 0

Protocol DEC MOP 

Switching path Pkts In Chars In Pkts Out Chars Out

Process 0 0 306 23562

Cache misses 0 - - -

Fast 0 0 0 0

Auton/SSE 0 0 0 0

Protocol ARP 

Switching path Pkts In Chars In Pkts Out Chars Out

Process 2510019 150604424 15883 952980

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 3057 874302 3074 1118911

Cache misses 0 - - -

  ----- Original Message ----- 
  From: Arie Vayner 
  To: Ilir Nako 
  Cc: cisco-bba at puck.nether.net 
  Sent: Tuesday, February 17, 2009 3:45 PM
  Subject: Re: [cisco-bba] High cpu -7200 vxr router --pppoe service

  Ilir,

  Can you provide some more info please?

  What kind of NPE processor do you use?
  What is the total bps/pps rate you are running at?

  If you could share a "show run" maybe we could provide more feedback.

  Thanks
  Arie

  On Tue, Feb 17, 2009 at 3:38 PM, Ilir Nako <inako at abcom.al> wrote:

    Hi 
    I use cisco 7200 vxr router for pppoe services.For the moment are about 800 sessions .For one user are 500 sessions of NAT.But the cpu is about 60% .Is it normal for this router ,this load of cpu ? 

    Regards 
    Ilir Nako

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