[c-nsp] Loopback IP set to .255 - 6500 responds to ICMP echo-request from wrong interface

[Jon Lewis]

On Sun, 1 Jan 2012, Mikael Abrahamsson wrote:

> On Sun, 1 Jan 2012, Mohamed Touré wrote:
>
>> For "security reasons" (Smurf attacks ...) IP packets with destination of 
>> classfull broadcast may be filtered by your upstream security devices if 
>> any.
>
> There were none of those involved in this.

Having seen IOS versions that refused to forward traffic for .255 
destinations, when the .255 was in the IGP as a /32 (even with ip 
classless in the config), I've since avoided using .0 or .255 addresses. 
It seems classful routing may be dead, but not entirely forgotten.

----------------------------------------------------------------------
  Jon Lewis, MCP :)           |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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