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

Ilir Nako inako at abcom.al
Tue Feb 17 11:55:49 EST 2009


How can I make this?  increasing your input queue on the GigE port

Regards 
Ilir
  ----- Original Message ----- 
  From: Arie Vayner 
  To: Ilir Nako 
  Cc: cisco-bba at puck.nether.net 
  Sent: Tuesday, February 17, 2009 4:04 PM
  Subject: Re: [cisco-bba] High cpu -7200 vxr router --pppoe service


  Ilir,

  Looking at the stats, and mostly due to the fact that you have NAT enabled, I would say this is what the box can handle.
  I would try increasing your input queue on the GigE port, as I can see quite a lot of drops there, which could be due to the NAT fixups.

  Arie


  On Tue, Feb 17, 2009 at 4:59 PM, Ilir Nako <inako at abcom.al> wrote:

    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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