bluespringsit
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Master Browser 8003/Layer 3 Network/DHCP
Since moving over to a layer 3 network, I am now seeing Event ID 8003 Master Browser errors in my event logs. This is happening because I have ip helper-address' on each vlan for dhcp. This is whats forwarding udp 137 and 138 to other segments
https://www.experts-exchange.com/questions/20927998/Disable-udp-on-ports-137-and-138-on-cisco-1700.html?query=UDP+BROADCAST+FORWARDING+CISCO&clearTAFilter=true
I have a dhcp server on one vlan, which is also a domain controller. I have another domain controller on a different vlan. The rest of the vlans are printers and workstations only. If I do a no ip forward-protocol udp 137 and 138 on each vlan, will this mess anything else up?
https://www.experts-exchange.com/questions/20927998/Disable-udp-on-ports-137-and-138-on-cisco-1700.html?query=UDP+BROADCAST+FORWARDING+CISCO&clearTAFilter=true
I have a dhcp server on one vlan, which is also a domain controller. I have another domain controller on a different vlan. The rest of the vlans are printers and workstations only. If I do a no ip forward-protocol udp 137 and 138 on each vlan, will this mess anything else up?
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ASKER
I do have both Wins and DNS running. All of the servers and wkstns have dns entries. I do not have the printers in dns or wins. Will I really need dns entries for the printers if I take down wins and block netbios broadcasts?
ASKER
Diggisaur-To answer your question, the dhcp server is on one vlan. It is also a DC. There is another DC on another vlan, but it is not a dhcp server.
Wait...it looks like VLAN and Subnet are being used interchangably here. VLAN and Subnet are not the same thing.
Did you have a problem before with too much broadcast traffic? Is this why you migrated to VLANs?
Did you have a problem before with too much broadcast traffic? Is this why you migrated to VLANs?
ASKER
I appologize. Same subnet accross the network. Different vlans for the different buildings, then further segmented to servers,wkstns,printers,ec
The migration to vlans was done in preperation for a future wireless network, for organization and to create seperate broadcast domains to minimize traffic.
The migration to vlans was done in preperation for a future wireless network, for organization and to create seperate broadcast domains to minimize traffic.
ASKER
Also, I shut down Wins on both servers yesterday-everything seems to be running smooth on dns only. (all 2k and xp network)
Well from memory does the browser elections and challenges all occur via broadcasts? Maybe the workstation don't see the server as a master browser because the broadcasts don't reach it, so they elect themselves the roll of master browser on each VLAN. Maybe, I'm off here.
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