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--- networking:router:mikrotik_vlan [2014/02/15 12:01]
gcooper
+++ networking:router:mikrotik_vlan [2014/12/16 14:06] (current)
gcooper
@@ Line 10: / Line 10: @@
   * VLAN interfaces on MikroTik devices are "add tag on egress / remove tag from ingress"
   * To be able to forward packets from access-ports to VLANs, we need bridges
+  * Ethernet MTU will increase up to 1522 bytes because of the added tag
+    * The normal Ethernet MTU is up to 1518 bytes
+===== Switch Ports =====
+  * **Access**
+    * An access port should be used only with untagged packets.
+    * This kind of port is used to connect PCs to the switch.
+  * **Trunk**
+    * A trunk port is capable of receiving and forwarding packets from multiple vlans.
+    * This type of port is used to interconnect switches.
+  * **Hybrid**
+    * A hybrid port is a special mode that allow untagged and tagged packets on the same port.
+    * For example, you have a VoIP desk phone and you connect your PC to the phone and the phone to the switch.
+    * We will have a VLAN for VoIP and untagged data for the PC.
+    * http://forum.mikrotik.com/viewtopic.php?f=13&t=87537
 ===== Create VLANs =====
@@ Line 15: / Line 31: @@
   * Create VLAN sub-interfaces on physical interfaces
   * Bridge the sub-interfaces
+    * To forward packets from access-ports to VLANs we need bridges
   * IP addresses are then configured on the respective bridges
   * Treat EoIP tunnel interfaces like physical interfaces
-  * If you are not stripping tags, you don't need to configure the VLAN interfaces, at least on physicsal trunk ports
+  * If you are not stripping tags, you don't need to configure the VLAN interfaces, at least on physical trunk ports
   - Configure VLANs on trunk interface ports
@@ Line 46: / Line 63: @@
 https://vanachterberg.org/2011/09/per-vlan-pptp-with-routeros-and-mikrotik/
+====== Notes From Others ======
+Create vlan interfaces to the physical interface connected to the Cisco interface which in trunking mode (I don't like Ciscos naming, a trunk is bundled ports).
+Then if you want to have ports in the MT to be "untagged" (Cisco: access mode). create a bridge for every VLAN that you put in the Cisco "trunk".
+Put the VLAN interfaces of the physical port and the ports you want to be left untagged into the bridge.
+Untagged traffic on the "trunk" port is the physical interface traffic ie ether1.
+Example of MT interfaces:
+<file>
+ether1 (this is the port connected to the Cisco "trunk" port)
+ether1-vl100 (VLAN interface)
+ether1-vl200
+ether1-vl300
+br-vl100 (Bridge for vlan ID 100)
+ether1-vl100 (VLAN interface)
+ether2 (physical interface untagged traffic)
+br-vl200 (Bridge for vlan ID 200)
+ether1-vl200 (VLAN interface)
+ether3 (physical interface untagged traffic)
+br-vl300 (Bridge for vlan ID 300)
+ether1-vl300 (VLAN interface)
+ether4 (physical interface untagged traffic)
+wds-1-vl300 (VLAN interface on the wds-1 interface)
+eoip-1 (Ethernet over IP interface in the same Layer2 network)
+</file>
+Summary:
+create VLAN interfaces in physical interfaces or WDS interfaces.
+create a bridge for each VLAN
+I hope this clarify how to do VLAN and bridging in ROS.
+I'm not a writer so for you you need some references if you want to read more:
+http://gentoo-wiki.com/HOWTO_setup_a_gentoo_bridge
+http://www.pixelchaos.net/2008/07/16/vl ... ing-in-xen
+http://mum.mikrotik.com/presentations/2 ... ngwire.pdf

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