North American Network Operators Group|
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Re: Standard prefix length filtering
On 19 Sep 2007, at 06:22, chk 543 wrote:
Is there a standard prefix length most providers filter on, or is there a way to find out what each provider filters on? We have been assigned a /22 and are wondering if we will have any issues with this block.
There are no hard and fast rules, but a general rule is the more you de-aggregate the more problems you are going to have, so unless you have a very good reason not to, announce the /22 and nothing longer.
Best wishes, Andy Davidson.