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PING reply not from the router / switch i pinged

HI experts
I have a question.
When ever I  ping a Default gateway specified in my network settings on windows PC, I get a reply from some other IP address that says TTL expired in transit.
how does this work.?

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fieldtechsupport
Asked:
fieldtechsupport
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1 Solution
 
CKWTCommented:
some Routers would block ICMP traffic for DoS security are u pinging from WAN or LAN of router or from what type of switch?..

Hope we can help

CKWT
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Thanatos2kCommented:
TTL expired in transit usually means there is a network loop somewhere.

Can you post the results for ipconfig /all from the command prompt?
Also describe your network layout, including IP scheme of your local subnet, and both sides of your router?
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CKWTCommented:
wouldn't he have problems accesing network or internet if a missplaced route was installed?

CKWT
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ravisimpiCommented:
Just pinging to the default gateway?? TTL Expired in transit.?

Use the "Tracert" command to determine whether misconfigured routers have caused a routing loop.

Peace and Health
Ravi Simpi
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rliptrotCommented:
Do as ravi says, open a command prompt and type tracert (ip address here) sounds like you've got some network issues that need sorting out.  Just out of interest do the IP addresses involved start with either a 10, 172 or 192 ?
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fieldtechsupportAuthor Commented:
Guys,
Heres the traceroutes.......could it be an issue related to STP..?
C:\>ping 10.36.100.9

Pinging 10.36.100.9 with 32 bytes of data:

Reply from 10.127.53.5: TTL expired in transit.
Reply from 10.127.53.5: TTL expired in transit.
Reply from 10.127.53.5: TTL expired in transit.
Reply from 10.127.53.5: TTL expired in transit.

Ping statistics for 10.36.100.9:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum =  0ms, Average =  0ms
C:\>tracert 10.36.100.9

Tracing route to 10.36.100.9 over a maximum of 30 hops

  1   <10 ms   <10 ms   <10 ms  10.1.245.1
  2   516 ms   531 ms   531 ms  10.129.0.44
  3   515 ms   531 ms   532 ms  10.127.3.130
  4   531 ms   531 ms   531 ms  10.127.53.5
  5   515 ms   532 ms   531 ms  10.127.53.6
  6   516 ms   531 ms   610 ms  10.127.53.5
  7   516 ms   531 ms   531 ms  10.127.53.6
  8   515 ms   532 ms   531 ms  10.127.53.5
  9   562 ms   532 ms   531 ms  10.127.53.6
 10   516 ms   531 ms   578 ms  10.127.53.5
 11   531 ms   531 ms   532 ms  10.127.53.6
 12   532 ms   531 ms   531 ms  10.127.53.5
 13   516 ms   531 ms   532 ms  10.127.53.6
 14   532 ms   531 ms   531 ms  10.127.53.5
 15   532 ms   515 ms   532 ms  10.127.53.6
 16   516 ms   531 ms   516 ms  10.127.53.5
 17   531 ms   532 ms   531 ms  10.127.53.6
 18   531 ms   532 ms   531 ms  10.127.53.5
 19   516 ms   531 ms   547 ms  10.127.53.6
 20   531 ms   532 ms   531 ms  10.127.53.5
 21   547 ms   531 ms   532 ms  10.127.53.6
 22   531 ms   532 ms   531 ms  10.127.53.5
 23   516 ms   531 ms   531 ms  10.127.53.6
 24   547 ms   531 ms   562 ms  10.127.53.5
 25   532 ms   531 ms   531 ms  10.127.53.6
 26   531 ms   547 ms   531 ms  10.127.53.5
 27   532 ms   531 ms   531 ms  10.127.53.6
 28   532 ms   531 ms   531 ms  10.127.53.5
 29   531 ms   547 ms   531 ms  10.127.53.6
 30   532 ms   531 ms   531 ms  10.127.53.5

Trace complete.
c:\>
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Thanatos2kCommented:
That is definitely a loop.

10.127.53.6 routes to 10.127.53.5, but 10.127.53.5 routes back to 10.127.53.6.

The odd thing is that the two IPs that are looping are on the same subnet... What router do those two IPs belong to? Can you describe your network in a little more detail?

Anyway, it is definitely a route issue, it looks like maybe 10.127.53.5 should route to something else, not 10.127.53.6, but I need to know more about the network if you can't see the error by looking at the routing table on 10.127.53.5.
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ravisimpiCommented:
4   531 ms   531 ms   531 ms  10.127.53.5
  5   515 ms   532 ms   531 ms  10.127.53.6
  6   516 ms   531 ms   610 ms  10.127.53.5
  7   516 ms   531 ms   531 ms  10.127.53.6
  8   515 ms   532 ms   531 ms  10.127.53.5
  9   562 ms   532 ms   531 ms  10.127.53.6
 10   516 ms   531 ms   578 ms  10.127.53.5
 11   531 ms   531 ms   532 ms  10.127.53.6
 12   532 ms   531 ms   531 ms  10.127.53.5
 13   516 ms   531 ms   532 ms  10.127.53.6
 14   532 ms   531 ms   531 ms  10.127.53.5
 15   532 ms   515 ms   532 ms  10.127.53.6
 16   516 ms   531 ms   516 ms  10.127.53.5
 17   531 ms   532 ms   531 ms  10.127.53.6
 18   531 ms   532 ms   531 ms  10.127.53.5
 19   516 ms   531 ms   547 ms  10.127.53.6
 20   531 ms   532 ms   531 ms  10.127.53.5
 21   547 ms   531 ms   532 ms  10.127.53.6
 22   531 ms   532 ms   531 ms  10.127.53.5
 23   516 ms   531 ms   531 ms  10.127.53.6
 24   547 ms   531 ms   562 ms  10.127.53.5
 25   532 ms   531 ms   531 ms  10.127.53.6
 26   531 ms   547 ms   531 ms  10.127.53.5
 27   532 ms   531 ms   531 ms  10.127.53.6
 28   532 ms   531 ms   531 ms  10.127.53.5
 29   531 ms   547 ms   531 ms  10.127.53.6
 30   532 ms   531 ms   531 ms  10.127.53.5
Here is a loop which has occured. There may be lot of reasons for a loop to exist.. There is a loop between 10.127.53.5and 10.127.53.6 You must now see why the packets are not passing 10.127.53.6 to other destination but are being given back to 10.127..53.5..


Peace and Health.
Ravi SImpi
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