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For those wondering what exactly is SDF, a summary loading quickly: https://web.archive.org/web/20160828065530/http://sdf.org/?faq?BASICS?01 https://web.archiv

• sigjuice 10y ago
  Interesting. Anyone know what they mean by We are using a 'swamp' class C 192.94.73...? Edit: Found https://tools.ietf.org/html/rfc4632 https://tools.ietf.org/html/rfc4632 (CIDR: The Internet Address Assignment and Aggregation Plan), which says this. Still not quite sure what they mean. Note that, as defined, this plan neither requires nor assumes the re-assignment of those parts of the legacy "Class C" space that are not amenable to aggregation (sometimes called "the swamp").
  • daurnimator 10y ago
    Good question. Some quick googling turned up: https://www.safaribooksonline.com/library/view/bgp/9780596002541/ch04.html https://www.safaribooksonline.com/library/view/bgp/978059600... > Since more than half the global routing table consists of /24 announcements, those are the first candidates for being filtered. More aggressive filters may even filter out everything smaller than the smallest assigned PA blocks, possibly with some exceptions for “the swamp,” the part of the Class C space assigned in pre-CIDR days(192.x.x.x and part of 193.x.x.x). The currently allocated smallest PA blocks are /20, but much of the Class C space is allocated to ISPs in /19 and larger blocks.
  • jpwgarrison 10y ago
    (paid up sdf user since ~2004) FWIW they had to give back that IP space to the actual owner a few months back and are in the 205s now.
  • inopinatus 10y ago
    Hard to navigate and full of strange beasts, some of which will bite you if challenged.