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Re: Refusing Pings on Core Routers??? A new trend?
On Oct 19, 2006, at 10:14 PM, Rubens Kuhl Jr. wrote:
You don't recall well.template response -- I hear is "Well, you can't rely on traceroute because of ICMP prioritisation". When you start to explain how traceroute actually works (both ICMP-based and UDP-based (which still relies on ICMP responses, of course!)), and that ICMP prio should only affect the IP of which the router listens on (and not hops beyond or at the dest), most NOCs fire back with anotherIf I recall well, Cisco GSRs impose low priority and/or limits for all ICMP traffic flowing thru the box, not just packets to/from router itself, and there's not a knob to adjust that.
Although there is a knob if you want to tweak it. But there's a knob for just about everything - it's just not tweaked by default.