On 01/31/2017 11:26 AM, Rick Stevens wrote:
On 01/31/2017 10:56 AM, Joe Zeff wrote:
>On 01/31/2017 10:37 AM, Rick Stevens wrote:
>> 1. Perform a "traceroutewww.google.com" or other site you
>> are having issues with. You may find a hop in the route taken
>> that points to an issue.
>
>Sometimes, you'll get no response from most of the hops (nothing but
>***) but it gets through. If that happens, try traceroute -I instead,
>although you'll need to do it as root. That uses ICMP ECHO for the
>probes, and is less likely to be dropped.
Yes, that is true, but keep in mind that -I may also not work. Sometimes
pings are not returned (if the target has ICMP blocked for some reason,
such as being the VIP for a load balanced cluster).
Indeed. However, using -I will often get you more data to work with,
and doesn't take much time, so it's worth trying if a regular traceroute
doesn't get much response.
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