| A more flexible 'knob' would be cool, something like combining the 'cos' | bits in the labels with the decision to decremening or not. This will give | the management station the power to 'trace' even the regular trace packet | can't do. No, no, no, no, no. You are confusing TTL expiration with "visibility". You have a trade off between size of forwarding loop and TTL decrement. The longer it takes to decrement a TTL to 0 in a forwarding loop, the worse the loop's effects will be. What you want -- and I think you are very strange for wanting it, by the way, but I will supply you a solution anyway -- is a knob that modifies the ICMP ttl exceeded message that is sent back to the source. Sean.