[ppml] Policy Proposal 2003-15: IPv4 Allocation Policy for the Africa Portion of the ARIN Region
jlewis at lewis.org
jlewis at lewis.org
Thu Sep 25 20:40:53 EDT 2003
On Fri, 26 Sep 2003, Eyal Tevet wrote:
> Although you are correct that it is not impossible to multi-home without
> being in the posession of a portable block when you have 1/2/3
> allocations of /24 blocks, doing so when you have maybe 5 or 6 /26 and
> /25 allocations is effectively impossible. This is largely because most
> larger ISP's (even in South Africa) will ignore any advertisements
> smaller than /24.
AFAIK, ignoring prefixes longer than /24 is pretty common over here too.
But if I were in the situation above, I'd ask the provider who'd given me
5 or 6 /26-/25 subnets to aggregate my space and trade in those subnets on
an equivalent number of /24's or shorter prefixes.
> At the same time, if you do find the need to change upstream providers,
> renumbering out of, say, two to three /24's worth of address space that
> have been reassigned to clients as /30 blocks is not a simple operation.
> (Yes, due to the limited address space our policy is to assign exactly
> /30 blocks to fixed line clients)
It takes time. I don't see anything unusual about that though. We don't
have a "/30 policy", but rather assign what the customer can justify.
Lots of business DSL customers do NAT on their CPE, so they're just a
/32, with maybe some port forwarding for an internal mail server. If they
want to run their own firewall, we route them a /30 (1 IP for the CPE's
ethernet, 1 for the firewall). Renumbering in the other ARIN regions
sucks just as much as in Africa. Nobody likes to do it.
----------------------------------------------------------------------
Jon Lewis *jlewis at lewis.org*| I route
Senior Network Engineer | therefore you are
Atlantic Net |
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