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

Tue Feb 17 10:04:20 EST 2009

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 <arievayner at gmail.com>
> *To:* Ilir Nako <inako at abcom.al>
> *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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>>
>
>
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