Re: Ping drops

Are you using dynamips or real routers?

-- 
Regards,
Iwan Hoogendoorn
CCIE #13084 (R&S / Security / SP)
Sr. Support Engineer  IPexpert, Inc.
URL: http://www.IPexpert.com
On Mon, Oct 19, 2009 at 10:27 AM, adam gibs <adamgibs7_at_gmail.com> wrote:
> Hi,
>
> Am getting CRC errors and input errors that can be for which reason?? Router
> C is the ISP device router A and B is in my control and running MPLS in
> between them and MTU size btween them is 1524.Layer 2 trunk is configured
> between C and B and a SVI is created to cummnicate to router C.
>
> The key point i wanna tell u is if the MTU  is not define while pinging
> ,,the success rate is 100%
>
> sh interface for B
>
> Router-B #sh interfaces vlan XX
> VlanXX is up, line protocol is up
>  Hardware is EtherSVI, address is 001d.7198.bc00 (bia 001d.7198.bc00)
>    Internet address is X.X.X.X/X
>  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
>     reliability 255/255, txload 1/255, rxload 1/255
>  Encapsulation ARPA, loopback not set
>  Keepalive not supported
>  ARP type: ARPA, ARP Timeout 04:00:00
>  Last input 00:00:19, output 00:00:19, output hang never
>  Last clearing of "show interface" counters 20:13:44
>  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
>  Queueing strategy: fifo
>  Output queue: 0/40 (size/max)
>  5 minute input rate 0 bits/sec, 0 packets/sec
>  5 minute output rate 0 bits/sec, 0 packets/sec
>  L2 Switched: ucast: 2414 pkt, 170278 bytes - mcast: 0 pkt, 0 bytes
>  L3 in Switched: ucast: 55274 pkt, 9712088 bytes - mcast: 0 pkt, 0 bytes
> mcast
>  L3 out Switched: ucast: 1213 pkt, 90975 bytes mcast: 0 pkt, 0 bytes
>     57688 packets input, 9882366 bytes, 0 no buffer
>     Received 0 broadcasts (0 IP multicasts)
>     0 runts, 0 giants, 0 throttles
>     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
>     58935 packets output, 9776944 bytes, 0 underruns
>     0 output errors, 0 interface resets
>     0 output buffer failures, 0 output buffers swapped out
>
> sh interface on A
>
>
> Router--A #sh interfaces t1/1
> TenGigabitEthernet1/1 is up, line protocol is up (connected)
>  Hardware is C6k 10000Mb 802.3, address is 001e.13e5.08c0 (bia
> 001e.13e5.08c0)
>    Internet address is X.X.X.X/X
>  MTU 1524 bytes, BW 10000000 Kbit, DLY 10 usec,
>     reliability 255/255, txload 1/255, rxload 1/255
>  Encapsulation ARPA, loopback not set
>  Keepalive set (10 sec)
>  Carrier delay is 0 msec
>  Full-duplex, 10Gb/s
>  input flow-control is off, output flow-control is off
>  ARP type: ARPA, ARP Timeout 04:00:00
>  Last input 00:00:00, output 00:00:02, output hang never
>  Last clearing of "show interface" counters 24w6d
>  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
>  Queueing strategy: fifo
>  Output queue: 0/40 (size/max)
>  5 minute input rate 42000 bits/sec, 7 packets/sec
>  5 minute output rate 102000 bits/sec, 12 packets/sec
>  L2 Switched: ucast: 2510607 pkt, 284517486 bytes - mcast: 5014037 pkt,
> 502588486 bytes
>  L3 in Switched: ucast: 27484640 pkt, 4089035241 bytes - mcast: 0 pkt, 0
> bytes mcast
>  L3 out Switched: ucast: 62961890 pkt, 56037590371 bytes mcast: 0 pkt, 0
> bytes
>     35288706 packets input, 4992780739 bytes, 0 no buffer
>     Received 5293236 broadcasts (0 IP multicasts)
>     0 runts, 2411 giants, 0 throttles
>     76 input errors, 65 CRC, 11 frame, 0 overrun, 0 ignored
>     0 watchdog, 0 multicast, 0 pause input
>     0 input packets with dribble condition detected
>     73469711 packets output, 57321041866 bytes, 0 underruns
>     0 output errors, 0 collisions, 2 interface resets
>     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
>
>
>
>
> On Mon, Oct 19, 2009 at 12:01 PM, Thameem Maranveetil Parambath <
> security.goodie_at_gmail.com> wrote:
>
>>  You should get 100% success rate.. Check for sh interface command on the
>> interface connecting A and B , also B and C and see if you are getting any
>> errors/discards etc.
>>
>> Regards
>> Thameem
>>
>>   On Mon, Oct 19, 2009 at 11:01 AM, adam gibs <adamgibs7_at_gmail.com> wrote:
>>
>>>  friends,
>>>
>>> A----------B---------------------C
>>>
>>> when i try to ping from A to C by 1500 byte with repeat count of 10000 the
>>> success rate is 98% and sometimes 97%.Is it something i have to go deep to
>>> troubleshoot or it is normal???? and what troubleshooting can i do for
>>> such
>>> situation,The MTU configured on interface is 1520.
>>>
>>> Success rate is 98 percent (986/1000), round-trip min/avg/max = 1/1/16 ms
>>>
>>> The devices A and B is 6500 switch with negligble traffic flowing through
>>> it.
>>>
>>> Thanks
>>>
>>>
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>
>
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