ping question

[Loren M. Lang]

On Sat, Feb 12, 2005 at 08:50:32AM -0800, ann kok wrote:
> Hi all
> 
> I ping from redhat to cisco router and freebsd router
> but I don't understand ttl (time to live)
> 
> Cisco router has ttl=251 and freebsd router has 58
> Does it set by the router itself?
> Can I change it in freebsd?

FreeBSD's default ttl, I believe, is 64, Cisco's is probably 255.  As
long as the number of hops neccessary to get to a certain computer is
never more than 64, there's nothing wrong with it.  The highest I've
seen is about 30 and the Internet is going to have to grow a bit, I
think, before it's an issue.

> 
> Thank you
> 
> 64 bytes from 212.223.x.193: icmp_seq=1151 ttl=251
> time=100 ms
> 64 bytes from 212.223.x.193: icmp_seq=1152 ttl=251
> time=103 ms
> 64 bytes from 212.223.x.193: icmp_seq=1153 ttl=251
> time=104 ms
> 64 bytes from 212.223.x.193: icmp_seq=1154 ttl=251
> time=106 ms
> 
> 64 bytes from 212.x.254.4: icmp_seq=1182 ttl=58
> time=105 ms
> 64 bytes from 212.x.254.4: icmp_seq=1183 ttl=58
> time=105 ms
> 64 bytes from 212.x.254.4: icmp_seq=1184 ttl=58
> time=104 ms
> 64 bytes from 212.x.254.4: icmp_seq=1185 ttl=58
> time=108 ms
> 
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