[c-nsp] Strange 7600 behavior
Raphael Costa
raphaelbscosta at gmail.com
Wed Mar 16 16:10:02 EDT 2011
Guys,
Definitely there is something really wrong. :-)
The router stoped consuming cpu due interrupts.
The only thing that I've changed was, changed uplink interface from 5/2 to
4/48 on the fly. After that the router began responding well.
So, to check again, I came the cable back to 5/2. And the router is working
well.
How could this be possible?
Router#show platform hardware capacity forwarding
L2 Forwarding Resources
MAC Table usage: Module Collisions Total Used
%Used
5 0 98304 7
1%
VPN CAM usage: Total Used
%Used
512 0
0%
L3 Forwarding Resources
Module FIB TCAM usage: Total
Used %Used
5 72 bits (IPv4, MPLS, EoM) 524288
349774 67%
144 bits (IP mcast, IPv6) 262144
9 1%
detail: Protocol Used
%Used
IPv4 347726
66%
MPLS 2048
1%
EoM 0
0%
IPv6 2
1%
IPv4 mcast 4
1%
IPv6 mcast 3
1%
Adjacency usage: Total Used
%Used
1048576 169
1%
Forwarding engine load:
Module pps peak-pps
peak-time
5 41127 86367 12:34:28 UTC Wed Mar 16
2011
Router#show platform hardware capacity forwarding
Router#sh int g5/2
GigabitEthernet5/2 is up, line protocol is up (connected)
Hardware is C7600 1Gb 802.3, address is c471.fe02.b200 (bia
c471.fe02.b200)
Internet address is 201.20.8.70/28
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 93/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s
Media-type configured as RJ45 connector
input flow-control is off, output flow-control is off
Clock mode is auto
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: 1/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 365332000 bits/sec, 30134 packets/sec
30 second output rate 6942000 bits/sec, 12383 packets/sec
L2 Switched: ucast: 10748 pkt, 12090146 bytes - mcast: 1321 pkt, 88190
bytes
L3 in Switched: ucast: 30867012 pkt, 46691056901 bytes - mcast: 0 pkt, 0
bytes mcast
L3 out Switched: ucast: 6010443 pkt, 424545288 bytes mcast: 0 pkt, 0 bytes
31267578 packets input, 47289495550 bytes, 0 no buffer
Received 1428 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
13511869 packets output, 949740713 bytes, 0 underruns
0 output errors, 0 collisions, 5 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
Router#sho
Router#ps
CPU utilization for five seconds: 0%/0%; one minute: 2%; five minutes: 5%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
2 28 490 57 0.00% 0.01% 0.00% 0 Load Meter
4 1668 1610 1036 0.00% 0.10% 0.05% 1 Virtual
Exec
8 20572 1154 17826 0.00% 0.74% 0.94% 0 Check heaps
27 8 2374 3 0.07% 0.00% 0.00% 0 IPC
Periodic Tim
160 500 42 11904 0.23% 0.02% 0.00% 0 Per-minute
Jobs
161 28 2462 11 0.00% 0.01% 0.00% 0 Per-Second
Jobs
186 8 70590 0 0.07% 0.01% 0.00% 0 ACE Tunnel
Task
213 21932 188 116659 0.00% 0.00% 0.28% 0 Collection
proce
223 816 7275 112 0.00% 0.01% 0.00% 0 IP Input
259 28 276966 0 0.07% 0.07% 0.07% 0 Ethernet
Msec Ti
263 28 70590 0 0.00% 0.01% 0.00% 0 IPAM
Manager
304 24428 1691 14445 0.00% 0.01% 0.28% 0 XDR mcast
312 57304 1387 41315 0.00% 0.02% 0.71% 0 IP RIB
Update
329 24 4608 5 0.07% 0.01% 0.00% 0 TCP Timer
388 1068 1224 872 0.00% 0.05% 0.05% 0 HIDDEN VLAN
Proc
470 71460 6273 11391 0.00% 0.05% 0.69% 0 BGP Router
552 8724 1251 6973 0.07% 0.00% 0.09% 0 BGP Task
553 24192 142 170366 0.00% 1.51% 1.19% 0 BGP Scanner
555 9192 49 187591 0.00% 0.00% 0.10% 0 BGP Event
Router#show ibc | i rate
5 minute rx rate 1000 bits/sec, 8 packets/sec
5 minute tx rate 22000 bits/sec, 50 packets/sec
2011/3/16 Raphael Costa <raphaelbscosta at gmail.com>
>
> Router#show ibc | i rate
> 5 minute rx rate 2031000 bits/sec, 3633 packets/sec
> 5 minute tx rate 4765000 bits/sec, 7262 packets/sec
>
>
> 2011/3/16 Sigurbjörn B. Lárusson <sigurbjornl at vodafone.is>
>
> show ibc | i rate is also useful here
>>
>> Kind regards,
>> Sibbi
>>
>>
>> On 16.3.2011 16:26, "Dobbins, Roland" <rdobbins at arbor.net> wrote:
>>
>> >
>> > On Mar 16, 2011, at 11:18 PM, Raphael Costa wrote:
>> >
>> >> Thanks for your quickly response.
>> >
>> > TCAM isn't overflowed, doesn't look like traffic's being punted.
>> >
>> > Maybe someone's packeting your box. You have iACLs and/or CoPP in
>> place?
>> >
>> > -----------------------------------------------------------------------
>> > Roland Dobbins <rdobbins at arbor.net> // <http://www.arbornetworks.com>
>> >
>> > The basis of optimism is sheer terror.
>> >
>> > -- Oscar Wilde
>> >
>> >
>> > _______________________________________________
>> > cisco-nsp mailing list cisco-nsp at puck.nether.net
>> > https://puck.nether.net/mailman/listinfo/cisco-nsp
>> > archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
>> _______________________________________________
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>
>
>
> --
> Raphael Bittencourt S. Costa
> raphaelbscosta at yahoo.com.br
> raphaelbscosta at gmail.com
>
--
Raphael Bittencourt S. Costa
raphaelbscosta at yahoo.com.br
raphaelbscosta at gmail.com
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