backbone routers' priority settings for ICMP & UDP

Tue Feb 3 20:05:13 UTC 1998

This is not typically a policy that is carried out by the providers.  It is
just how some router vendors have developed their implementations.  They
don't give a lower priority to UDP or ICMP unless that traffic is destine
for the router itself.  Although some providers do chose to block
traceroutes, but that's a different story.

--Mark Kayser
MCI Network Operations

> -----Original Message-----
> From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu]On Behalf Of
> Marko B.
> Sent: Tuesday, February 03, 1998 2:17 PM
> To: nanog at merit.edu
> Cc: marko at notwork.net
> Subject: backbone routers' priority settings for ICMP & UDP
>
>
> Greetings,
>
> In my travels I have heard numerous times that it is a popular practice to
> give ICMP and even UDP traffic a lower priority on backbone routers in
> times of congestion.
>
> Are there any providers that document this policy? How is this policy
> carried out on the actual hardware? Any pointers would be appreciated.
>
> Thanks.
>
> -Marko
>