[nsp] a question on traceroute

[Warren Kumari]

It kind of sounds as though CEF has gone a little wobbly. The record 
route option will make the packet get process switched and so oddness 
in  CEF will not affect those packets.

Sho ip cef <ip> and sho adjacency may help find the issue (or you could 
just turn CEF off and on again...)

Warren Kumari
CCIE #9190

On Jan 9, 2004, at 4:33 AM, Brian Turnbow wrote:

> Hello,
> I wanted to know what everyone thinks on this.
> If I send a trace  without any options, it goes in loop.
> If I send the same trace with the timestamp or record option, it 
> doesn't go
> in loop.
> I am not setting the loose o strict options, so thouhgt the routing 
> should
> not be effected, but...
>
> thanks in advance,
> Brian
>
>
>
> Cisco3660#trace
> Protocol [ip]:
> Target IP address: www.twice.it
> Source address:
> Numeric display [n]: y
> Timeout in seconds [3]:
> Probe count [3]:
> Minimum Time to Live [1]:
> Maximum Time to Live [30]:
> Port Number [33434]:
> Loose, Strict, Record, Timestamp, Verbose[none]:
> Type escape sequence to abort.
> Tracing the route to 194.21.41.150
>
>   1 xxx.31.239.53 0 msec 4 msec 0 msec
>   2 xxx.31.226.65 0 msec 4 msec 0 msec
>   3 xxx.31.231.246 0 msec 4 msec 0 msec
>   4 xxx.31.231.245 4 msec 0 msec 0 msec
>   5 xxx.31.231.246 4 msec 0 msec 4 msec
>   6 xxx.31.231.245 0 msec 4 msec 0 msec
>   7 xxx.31.231.246 4 msec 0 msec 4 msec
>   8 xxx.31.231.245 0 msec 0 msec 4 msec
>   9 xxx.31.231.246 0 msec 4 msec 0 msec
>  10 xxx.31.231.245 0 msec 0 msec 0 msec
>  11 xxx.31.231.246 0 msec 0 msec 4 msec
>  12 xxx.31.231.245 0 msec 4 msec 0 msec
>  13 xxx.31.231.246 4 msec 0 msec 4 msec
>  14 xxx.31.231.245 0 msec 4 msec 0 msec
>  15 xxx.31.231.246 4 msec 4 msec 0 msec
>  16 xxx.31.231.245 4 msec 0 msec 4 msec
>  17 xxx.31.231.246 0 msec 4 msec 0 msec
>  18 xxx.31.231.245 4 msec 0 msec 4 msec
>  19 xxx.31.231.246 0 msec 4 msec 0 msec
>  20 xxx.31.231.245 4 msec 0 msec 4 msec
>  21 xxx.31.231.246 0 msec 4 msec 4 msec
>  22 xxx.31.231.245 0 msec 4 msec 0 msec
>  23 xxx.31.231.246 4 msec 4 msec 0 msec
>  24 xxx.31.231.245 4 msec 0 msec 4 msec
>  25 xxx.31.231.246 4 msec 0 msec 4 msec
>  26 xxx.31.231.245 0 msec 4 msec 4 msec
>  27 xxx.31.231.246 0 msec 4 msec 0 msec
>  28 xxx.31.231.245 4 msec 4 msec 0 msec
>  29 xxx.31.231.246 4 msec 4 msec 0 msec
>  30 xxx.31.231.245 4 msec 4 msec 0 msec
> Cisco3660#
> Cisco3660#trace
> Protocol [ip]:
> Target IP address: www.twice.it
> Source address:
> Numeric display [n]: y
> Timeout in seconds [3]:
> Probe count [3]:
> Minimum Time to Live [1]:
> Maximum Time to Live [30]:
> Port Number [33434]:
> Loose, Strict, Record, Timestamp, Verbose[none]: time
> Number of timestamps [ 9 ]: 5
> Loose, Strict, Record, Timestamp, Verbose[TV]: v
> Loose, Strict, Record, Timestamp, Verbose[T]:
> Type escape sequence to abort.
> Tracing the route to 194.21.41.150
>
>   1 xxx.31.239.53 0 msec 0 msec 0 msec
>   2 xxx.31.226.65 4 msec 0 msec 4 msec
>   3 xxx.31.224.69 0 msec
>     xxx.31.231.246 4 msec
>     xxx.31.224.97 56 msec
>   4 xxx.31.224.66 0 msec
>     xxx.31.231.245 4 msec
>     xxx.31.224.102 4 msec
>   5 xxx.31.226.138 24 msec
>     xxx.31.224.97 28 msec
>     xxx.31.226.138 12 msec
>   6 xxx.31.224.102 4 msec *  20 msec
>   7  *
>     xxx.31.226.138 8 msec *
>   8
> Cisco3660#trace
> Protocol [ip]:
> Target IP address: www.twice.it
> Source address:
> Numeric display [n]: y
> Timeout in seconds [3]:
> Probe count [3]:
> Minimum Time to Live [1]:
> Maximum Time to Live [30]:
> Port Number [33434]:
> Loose, Strict, Record, Timestamp, Verbose[none]: rec
> Number of hops [ 9 ]: 5
> Loose, Strict, Record, Timestamp, Verbose[RV]: v
> Loose, Strict, Record, Timestamp, Verbose[R]:
> Type escape sequence to abort.
> Tracing the route to 194.21.41.150
>
>   1 xxx.31.239.53 0 msec 0 msec 4 msec
>   2 xxx.31.226.65 0 msec 4 msec 0 msec
>   3 xxx.31.224.69 4 msec
>     xxx.31.231.246 0 msec
>     xxx.31.224.97 4 msec
>   4 xxx.31.224.66 0 msec
>     xxx.31.231.245 0 msec
>     xxx.31.224.102 4 msec
>   5 xxx.31.226.138 32 msec
>     xxx.31.224.97 0 msec
>     xxx.31.226.138 16 msec
>   6 xxx.31.224.102 4 msec *  0 msec
>   7  *
>
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