[MLB-WIRELESS] IP Addressing

[Tony Langdon]

> Unlikely with a sensible allocation policy.  A Class B is a lot of
> addresses (192.168.0.0/16 is a Class B). 

I have a heap of 192.168.x networks in use here... Routing/firewalling to
external 192.168 addresses _will_ be a major pain! :(

Basically, 192.168.0.0 - 192.168.31.255 is all routed to various VPNs (my
own internal addresses are 192.168.15.x).  Also getting some allocations
around 192.168.100.x and 192.168.200-205.x

> IPv6 has a go at some of the allocation/conflict issues by 
> having scoped
> addresses.  There are link-local addresses, site-local addresses and
> global addresses.  Link local addresses are simply 
> _not_relevant_ outside
> the context of the link in question (e.g. an Ethernet 
> broadcast domain, a
> PPP link or whatever).  Site local addresses are relevant 
> with the "site",
> whatever that is...  The Brisbane Mesh people had some 
> discussion on this
> if you're at all interested.  >;-Q

Well, IPv6 would go a long way towards solving problems. :)  Who needs more
IP addresses?
> 
> Incidentally, there should be no problem having a mix of RFC1918 and
> "real" addresses on our eventual MAN.  They're all just 
> addresses, after
> all, and will happily co-exist in routing tables.
> 
> Pick something that isn't in use.  Be prepared to renumber at 
> some point.

Well, I'm going for 10.x stuff myself.  The design of my wireless side will
mean renumbering shouldn't be a problem in the 10.x segments...  The 192.168
stuff is mostly not easily changed...

If you're wondering why I have so many IPs...  Just I have a lot of VPN....
I'll just ping home from the office... ;)

C:\WINDOWS\DESKTOP>ping 192.168.15.1

Pinging 192.168.15.1 with 32 bytes of data:

Reply from 192.168.15.1: bytes=32 time=59ms TTL=254
Reply from 192.168.15.1: bytes=32 time=58ms TTL=254
Reply from 192.168.15.1: bytes=32 time=58ms TTL=254
Reply from 192.168.15.1: bytes=32 time=63ms TTL=254

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