I am trying to add a individual router port to a VLAN as there is an existing VLAN bridge and I do not want to add the port in question to that as it is for a set range of devices and do not want other VLANs allowed on the port. The current VLAN Bridge is set for all them and it is for going out to the WAN but I want to add this port to the Iso-VLAN to enable it to receive DHCP as currently it does not but our switches connected to the router via the VLAN bridge are getting DHCP traffic.
You assign vlans to the bridge not the port.
On the port you can put one or more vlans as desired via the bridge setup.
Vlans by themselves are blocked from other vlans at layer2.
Using firewall rules you block them at layer3 on the router, the fact that they are on the same bridge is not an issue.
Further, if you want you can take a port OFF the bridge and assign a single vlan to that port.
They aren’t using the firewall aspect of the router and honestly not sure the company wants to do that. Can a port be on more than one bridge or is it an only one unit. Coming from a Cisco background this bridge concept looks like router on a stick to me. Also find it strange that on similar chaises there are subtle differences in how each unit’s interface on WinBox works.
Edit the port in question is not attached to the VLAN bridge at all. I was trying to avoid adding it.
All VLAN questions lead to http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1
A port can only be a member of a single bridge. The default behaviour of a bridge is to act in the same manner as an unmanaged switch - it learns MAC addresses and forwards packets with any ethertype including untagged IP or tagged VLAN.
To change the behaviour so differing VLANs can be passed through the ports the simplest method is to enable VLAN filtering on the bridge, however on older devices this disables L2 hardware switching and all of the bridged traffic is handled by the CPU which often limits the throughput to less than wirespeed. To overcome this you have to resort to configuring the switch chip directly, and the various devices used in different models all have slightly different capabilities.
A Mikrotik bridge is more like an embedded managed switch, one port of which is connected to services provided by the CPU. There is a good description here http://forum.mikrotik.com/t/routeros-bridge-mysteries-explained/147832/1
For Mikrotik bridge equivalents of Cisco switchports see http://forum.mikrotik.com/t/why-does-this-work-with-cisco-and-not-with-mikrotik/156721/3 and http://forum.mikrotik.com/t/vlan-issues/143197/6