[LINK] There goes the neighbourhood...

[Kim Holburn]

I think you are all missing the point.  ICMP redirect is involved in TCP data stack talk and involves a short discussion between a router or possible router and a TCP sender.  Other things mentioned are short technical discussions at the IP level.

On the other hand *EVERY* VOIP data packet carries IP addresses in the data part of the packet along with voice or video or other data.  This is not stack to stack talk, this is at the application layer and is irrelevant to the IP layer.

From:
http://www.technodata.org/files/technical/H323-NAT%20Technical%20Guide.htm

> 2- H.323 VoIP Packets
> 
> Difference b/w Normal Data Packets Vs H.323 Packets over IP
> 
> The main difference between a normal data packet and an H.323 VoIP packet is that a normal data packet carries its own IP address in its IP header and its source and destination port values in the TCP header. Whereas in an H.323 VoIP packet – the source IP address and source IP port is also carried in the H.323 payload body of the H.323 packet. This H.323 data payload is called Protocol Data Unit (PDU). The diagram below illustrates these differences.

On 2011/May/12, at 4:01 PM, Martin Barry wrote:

> $quoted_author = "Kim Holburn" ;
>> 
>> Yes, a good example, and do you think ICMP REDIRECT has a place in a well
>> managed network?  I remember using it once in a difficult migration.  All
>> the windows machines ignored it - as they should.  It's a thing from the
>> past.
> 
> Heh, if you think ICMP REDIRECT was bad wait till you learn about IPv6 RAs.
> 
> cheers
> Marty
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-- 
Kim Holburn
IT Network & Security Consultant
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