mailing list archives
Re: Level 3 BGP Advertisements
From: Grzegorz Janoszka <Grzegorz () Janoszka pl>
Date: Wed, 29 Aug 2012 23:06:12 +0200
On 29-08-12 22:55, STARNES, CURTIS wrote:
We are announcing our /19 network as one block via BGP through AT&T, not broken up into smaller announcements.
Earlier in the year I started receiving complaints that some of our client systems were having problems connecting to
different web sites.
After much troubleshooting I noticed that in every instance the xlate in our Cisco ASA for the client's IP last octet
was either a 0 or 255.
Since I am announcing our network as a /19, the subnet mask is 255.255.224.0, that would make our network address
x.x.192.0 and the broadcast x.x.223.255.
So somewhere the /24 boundary addresses were being dropped.
Just curious if anyone else has seen this before.
Yes, actually there are people over Internet blocking all IP's ending
with 0 or 255 as a kind of bogon or other old wives' tale.
Re: Level 3 BGP Advertisements Randy Bush (Aug 30)
Re: Level 3 BGP Advertisements Nick Olsen (Aug 29)