Re: Master Browser?
From: Ice-wizard (this.is.not_at_my.real.email.address)
Date: 12/29/04
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Date: Wed, 29 Dec 2004 19:09:17 GMT
Well... that did not work. TCP/IP failed shortly after sent the previous
post. I am wondering if Windows Firewall is the culprit. I went to
Network Neighborhood and tried to see the internal network. The second
computer is off.. I should only be able to see my computer on the network.
I got an error saying I was not authorized to see the network. I turned off
the Windows Firewall and tried again and I was able to see my computer on
the network this time. So, I will wait another 13 hours to see if it fails
again.
"Ice-wizard" <this.is.not@my.real.email.address> wrote in message
news:%xBAd.9320$hc7.7227@trnddc06...
> Thanks, that explains the origins and uses of the Master Browser pretty
> good. I did not read in there how to fix the problem, though. So far,
> we are up to hour 13 from the last reboot... so far so good.. :)
> Here's hoping that the Protected Files Verification did its magic.
>
>
> "David Candy" <.> wrote in message
> news:OSQjVPX7EHA.3616@TK2MSFTNGP11.phx.gbl...
> The user interface to the microsoft browser is My Network Places. It
> simply a list of what is on the network. All computers on the network hold
> elections (often every few minutes) and who wins becomes the master
> browser for a while. It can take 12 minutes for a network object that goes
> offline to be noticed (it gets 3 chances 4 minutes apart to say "I'm
> really still here").
>
> It has nothing to do with the internet.
>
> The Browser
> The Browser service (not to be confused with a Web browser) was originally
> designed to be a simple workgroup enumeration tool, but has been enhanced
> significantly over time. The Browser service supports browsing computers
> on the network and being browsed by other computers.
>
> It is the service that gathers and organizes the list of computers and
> domains that is displayed in Network Neighborhood. (You can also see the
> browse list by typing net viewin the command window.) The Browser
> maintains an up-to-date list of computers and provides this information to
> programs that require it.
>
> Note
>
> Under Windows NT version 3.5x, use the File Manager Connect Network Drive
> dialog box to view the computer browser list.
>
> Master Browser Elections
> The Primary Domain Controller (PDC) for a domain always functions as the
> Domain Master Browser and is responsible for replicating the browse lists
> to all Master Browsers within the domain. A Master Browser is elected on
> each subnet within the domain.
>
> Each domain has one Master Browser per subnet that contains computers
> listening for server announcements. The Master Browser maintains lists of
> available resources that can be requested by client computers.
>
> As the number of hosts on a subnet grows, the Master Browser will start to
> replicate the browse list to Backup Browsers. If the Master Browser is
> shut down, an election takes place to determine the new Master Browser.
> Existing Backup Browsers have an advantage in the election. For this
> process, workgroups and domains function alike, except that all Windows NT
> Servers are either a Master Browser or Backup Browser, and Windows NT
> Workstation and Windows for Workgroups computers are not allowed to become
> Backup or Master browsers unless specifically configured.
>
> Master Browser elections take place over the special <domain>[1E] NetBIOS
> name using subnet broadcasts (without using WINS). The election is fully
> automatic and takes into consideration a number of heuristics: operating
> system, version number, uptime, role (Workstation, Backup Domain
> Controller, Primary Domain Controller), etc. In general, the most robust
> computer on the network wins. Elections are forced when:
>
> a.. A client cannot find its Master Browser at startup.
> b.. A client detects that a Master Browser has disappeared.
> c.. A Windows NT Server starts on the network.
> Maintaining Browse Lists
> File servers periodically (once every 12 minutes) announce their presence
> to the special <domain>[1D] NetBIOS name in an IP subnet broadcast. The
> Master Browser builds a list from these broadcasts. In addition, all
> Master Browsers register a group name \0x01\0x02__MSBROWSE__\0x02\0x01on
> the local subnet (not with WINS). Periodically the Master Browsers in the
> domains and workgroups announce their presence to this special name. Thus,
> in addition to the workgroup or domain membership lists, Master Browsers
> also maintain lists of other domains with their associated Master
> Browsers.
>
> Requesting Browse Lists
> When a browse request is made from a client, a "GetBackupListRequest" is
> sent to the <domain>[1D] name (the Master Browser) that returns a list of
> Browser servers for the local subnet. The "GetBackupListRequest" is also
> unicast to the Domain Master Browser, which handles the case in which the
> queried domain has no members on the subnet. The client Browser service
> selects three of the browsers from the list and stores them for future
> use. Then when further browsing is done, by calling the NetServerEnum API,
> one of the three saved names is contacted by the client.
>
> When a client queries its workgroup or domain browser, it first gets back
> a list of all of the domains and workgroups that the browser has learned
> about through the \0x01\0x02__MSBROWSE__\0x02\0x01 name as well as the
> name of the Master Browser for each. When the user expands a domain or
> workgroup into a membership list, the client sends a request to
> <domain>[1D] to get to the list (this is translated to a local subnet
> broadcast by WINS). If this fails, it contacts the Master Browser for the
> particular domain or workgroup and fetches the membership list.
>
> The Domain Master Browser
> As mentioned earlier, the PDC always acts as the Domain Master Browser.
> Because each locally-elected Master Browser will only hear local
> membership announcements, there needs to be a mechanism to consolidate all
> of the members into a single list. This is the role of the Domain Master
> Browser.
>
> Periodically, all of the locally-elected Master Browsers contact the PDC
> and replicate their membership lists to it. The PDC merges the list with
> the "master" list for the whole domain and replicates the master list back
> down.
>
> The replication algorithm is "smart" in that the local Master Browsers
> only replicate the members that they have learned about locally to the
> domain master. This whole mechanism allows members in a domain to span
> subnets and, for all clients (eventually), to be able to get complete
> membership lists.
>
> On WINS-enabled networks, the browser code in Windows NT versions 4.0 and
> 3.5x periodically connects to WINS and learns all of the computers that
> have registered any <domain>[1B] names. The Browser then does a
> GetDCName() on each of the <domain>[1B] names (followed by an attempt on
> <domain>[1C]), and adds the <domain name> <master browser name> to its
> domain/workgroup list. This allows members of one domain to locate the
> Master Browser for another domain even when it is on another subnet and
> the two domains have no "broadcast area" in common.
>
> Browsing for Other Windows-based Computers
> Browser code for Windows for Workgroups computers has been enhanced
> several times to reduce the dependency on having a BDC per subnet. The
> updated files are available from ftp.microsoft.com. Windows 95 computers
> also contain enhanced browsing code.
>
>
> --------------------------------------------------------------------------------
> Send feedback to MSDN.Look here for MSDN Online resources.
> --
> ----------------------------------------------------------
> http://www.uscricket.com
> "peter" <peter@nomalarky.ca> wrote in message
> news:uCIQPMW7EHA.2196@TK2MSFTNGP11.phx.gbl...
>> Its not a Browser like Internet Explorer as I understand it.Its the
>> actual
>> computer itself
>> I get the same message about every 2 days and the way I understand
>> it...one
>> computer cant find the other for some reason so it sets itself as the
>> "master"
>> I have narrowed down my start date for this problem to about the time I
>> installed SP2
>> But other than that it does not in any way seem to interfere with me
>> using the
>> net or Email.My system does not lock up.
>> There are times when in the middles of downloading a newsgroup message
>> things
>> seem to go real slow but a few minutes later its all back up to speed.
>> I would like to solve this problem too .......so if there is a solution
>> out
>> there lets hear it!!!
>> peter
>> "Ice-wizard" <this.is.not@my.real.email.address> wrote in message
>> news:eoqAd.9217$hc7.5206@trnddc06...
>>>I am having the exact same problem. I am using XP Home. I have two
>>>computers
>>>networked as a Workgroup via a Linksys 4 port router to a DSL modem. I
>>>am
>>>using Norton Systemworks and Microsoft Firewall. I have been using this
>>>setup
>>>for atleast a year and this problem has just started occuring. The only
>>>changes to the system that have been made is the regular Windows Update
>>>changes. Unfortunately, I have no idea when it started exactly to see if
>>>it
>>>was a particular Update.
>>>
>>> I get the same error in the Event Viewer, however.. my first indication
>>> that
>>> there is a problem.. somewhere between 8 and 12 hours, every day... I
>>> get a
>>> TCP/IP error while trying to connect to my email server using Outlook
>>> Express
>>> (error 0x800CCC15). At that time, Netscape 7.x and IE 6.x stop working.
>>> My
>>> IM clients (YM and AOL) continue working for a few minutes before I get
>>> a
>>> memory overflow error which completely locks down the system.
>>>
>>> I have tried setting the local services, such as "Computer Browsing" to
>>> restart the service as a recovery option, but it had no effect. I am
>>> totally
>>> at a loss. As far as I know, my computer never needed a Master Browser
>>> before....now all of a sudden it does...and it can not find it??? I
>>> checked
>>> the Event Viewer...and it lists the OTHER computer on the network as the
>>> Master Browser instead of this one.
>>>
>>> In response to the Knowledge Base, I just ran "sfc /runnow" and verified
>>> the
>>> protected files. Several libraries were rewritten. I have no idea if
>>> this
>>> has fixed anything.. I will have to wait to see if the TCP/IP stack
>>> fails
>>> again.
>>>
>>> Any clues would help greatly.
>>>
>>> "Fitz" <akfitz@mtaonline.net> wrote in message
>>> news:10scc7toq7pgi58@corp.supernews.com...
>>>>I have 4 computers networked (as a Workgroup, not a Domain) via a
>>>>Linksys 8
>>>>port router to a DSL modem. I am getting recurring Warnings and Errors
>>>>in
>>>>Event Viewer (Application) under the heading of ESENT.
>>>> It reads:
>>>> SOURCE: Browser
>>>> Category: None
>>>> Event ID: 8021
>>>>
>>>> The browser was unable to retrieve a list of servers from the browser
>>>> master
>>>> \\TESSA-1 on the network
>>>> \Device\NetBT_Tcpip_{5861C454-1B3E-499E-B052-52D0FB343013}. The data is
>>>> the
>>>> error code.
>>>>
>>>> Why is one computer designated the "master" on a network where all
>>>> computers
>>>> are connected through the router as a Workgroup? I am also getting
>>>> multiple
>>>> emails (the same email being recieved mutiple times, sometimes over
>>>> 100).
>>>>
>>>> The OS is WinXP Pro w/SP2. AVG 7 antivirus. I have run AdAware SE and
>>>> Registry Mechanic with nothing other than stored cookies found.
>>>> HijackThis
>>>> doesn't reveal anything unusual.
>>>>
>>>> Suggestions?
>>>>
>>>> Thanks,
>>>> Fitz
>>>>
>>>> --------------------------------------------------------------------------------------
>>>> Outgoing mail scanned with AVG 7 and is virus free
>>>>
>>>
>>>
>>
>>
>
>
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- In reply to: Ice-wizard: "Re: Master Browser?"
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