Bridge All Site Links RRS feed

  • Question

  • I don't actually have a problem, but I am not sure I understand the implications of a setting and thought I would see if anyone can point me to a good link regarding this question.

    With Bridge All Site Links (BOSL) disabled, I believe that users can only logon to their own site domain controllers. With BOSL enabled, I believe users will locate the next closest site by cost and use those domain controllers if the domain controllers in the current site are down.

    Is this correct, and can someone point me to an article from Microsoft that says that?

    Thursday, September 2, 2010 4:12 PM


All replies

  • Incorrect. BASL affects the way connections between AD sites (which facilitate AD repilcation) are created. With BASL enabled, ISTG is able to create a connection between two sites that are are not part of the same site link. More at http://technet.microsoft.com/en-us/library/dd736189(WS.10).aspx

    Keep in mind that in some cases, disabling BASL might have negative impact on site-awareness of DFS (http://technet.microsoft.com/en-us/library/cc782417(WS.10).aspx)


    • Marked as answer by Oldguard Thursday, September 2, 2010 5:04 PM
    Thursday, September 2, 2010 4:27 PM
  • They will still be able to use a DC in another site is BASL is disabled.   BASL is used for spoke communications (if hub is down).  However if you are in a branch site and your connection is physical connection is down then obviously you won't be able to log in anywhere else. 

    Not sure of a Microsoft article that directly talks about BASL and the DC locator process but a good BASL thread with some of the top guys on here (Marcin, Rich, JM) is worth reading





    Thursday, September 2, 2010 4:36 PM
  • I understood the implications for replication, but wasn't sure if it also affected what clients would connect to. I was trying to understand if there was any point in opening things like LDAP, Kerberos or RPC for clients. Based on what you are telling me that is an option even if BASL is disabled...

    Appreciate the feed back.

    • Proposed as answer by Axel Limousin Thursday, February 28, 2013 9:46 PM
    Thursday, September 2, 2010 5:06 PM