11.2 VLAN Example #2 (Trunk and Hybrid Ports)- Simulation of NTP servers and / or clients Simulation of PTP unicast / multicast masters and / or slaves. If enabled, all multicast packets on the network will be received by the interface. Hardware address) of interface mtu (integer, optional): MTU of interface promisc (bool, optional): Change the promiscuous mode of interface allmulti (bool, optional): Change the all-multicast mode of interface. BGP), multicast, network design, NAT/PAT, first-hop redundancy protocols.Interface attribute configuration reference mac (string, optional): MAC address (i.e. 11.1 VLAN Example #1 (Trunk and Access Ports)MACsec, defined in 802.1AE, provides MAC-layer encryption over wired networks. All Multicast Capable Intermediate Systems address: 01:80:C2:00:00:1E: All DTR Concentrators MAC group address: 01:80:C2:00:00:1F: EDE-CC PEP Address: 01:80:C2:00:00:01 - 01:80:C2:00:00:0F: 802.1 alternate Spanning multicast: EtherType is 0x0802: 01:80:C2:00:00:02: Ethernet OAM Protocol IEEE 802.3ah (also known as 'slow protocols') EtherType is 0x8809: 01:80:C2:00:00:03: Nearest non-TPMR Bridge group address IEEE Std 802.1X PAE address
All other alternative connections that would otherwise form loops, are put to standby, so that should the main connection fail, another connection could take its place. STP and RSTP allows bridges to communicate with each other, so they can negotiate a loop free topology. Each bridge runs an algorithm which calculates how the loop can be prevented.
To avoid unwanted MAC address changes, it is recommended to disable "auto-mac", and to manually specify MAC by using "admin-mac". One MAC address from slave (secondary) ports will be assigned to the bridge interface, the MAC address will be chosen automatically, depending on "port-number", and it can change after a reboot. The root bridge is the bridge with the lowest bridge ID.To combine a number of networks into one bridge, a bridge interface should be created (later, all the desired interfaces should be set up as its ports). (R)STP selects a root bridge which is responsible for network reconfiguration, such as blocking and opening ports on other bridges.
reply-only - the interface will only reply to requests originated from matching IP address/MAC address combinations which are entered as static entries in the IP/ARP table. proxy-arp - the interface will use the ARP proxy feature disabled - the interface will not use ARP This property only has effect when auto-mac is set to no.How long a host's information will be kept in the bridge database. This property only has effect when dhcp-snooping is set to yes.Static MAC address of the bridge. Can be used together with Option-82 capable DHCP server to assign IP addresses and implement policies.
After a device reboot, the bridge MAC can change depending on the port-number.Enables or disables DHCP Snooping on the bridge.Changes the EtherType, which will be used to determine if a packet has a VLAN tag. Value auto equals to the value of arp-timeout in IP/Settings, default is 30s.Automatically select one MAC address of bridge ports as a bridge MAC address, bridge MAC will be chosen from the first added bridge port. Therefore for communications to be successful, a valid static entry must already exist.Arp-timeout ( auto | integer Default: auto)ARP timeout is time how long ARP record is kept in ARP table after no packets are received from IP.
By default, VLANs that don't exist in the bridge VLAN table are dropped before they are sent out (egress), but this property allows you to drop the packets when they are received (ingress). This property only has effect when igmp-snooping is set to yes.Ingress-filtering ( yes | no Default: no)Enables or disables VLAN ingress filtering, which checks if the ingress port is a member of the received VLAN ID in the bridge VLAN table. This property only has effect when vlan-filtering is set to yes.Enables multicast group and port learning to prevent multicast traffic from flooding all interfaces in a bridge.Selects the IGMP version in which IGMP general membership queries will be generated. More details can be found in the Fast Forward section.Time which is spent during the initialization phase of the bridge interface (i.e., after router startup or enabling the interface) in listening/learning state before the bridge will start functioning normally.Specifies allowed frame types on a bridge port. This property only has effect when vlan-filtering is set to yes.Special and faster case of FastPath which works only on bridges with 2 interfaces (enabled by default only for new bridges).
This property only has effect when igmp-snooping is set to yes.Bridge count which BPDU can pass in a MSTP enabled network in the same region before BPDU is being ignored. This property only has effect when igmp-snooping is set to yes.Last-member-query-count ( integer: 0.4294967295 Default: 2)How many times should last-member-interval pass until a IGMP Snooping bridge will stop forwarding a certain multicast stream. If a IGMP Snooping enabled bridge does not receive a IGMP membership report after amount of last-member-interval, then the bridge considers that no one has subscribed to a certain multicast stream and can stop forwarding it. This value cannot be manually changed.Last-member-interval ( time Default: 1s)If a port has fast-leave set to no and a bridge port receives a IGMP Leave message, then a IGMP Snooping enabled bridge will send a IGMP query to make sure that no devices has subscribed to a certain multicast stream on a bridge port. The L2MTU value will be automatically set by the bridge and it will use the lowest L2MTU value of any associated bridge port. This property only has effect when vlan-filtering is set to yes.L2MTU indicates the maximum size of the frame without MAC header that can be sent by this interface.
If a new bridge port is added with L2MTU which is smaller than the actual-mtu of the bridge (set by the mtu property), then manually set value will be ignored and the bridge will act as if mtu=auto is set.Multicast-querier ( yes | no Default: no)Multicast querier generates IGMP general membership queries to which all IGMP capable devices respond with an IGMP membership report, usually a PIM (multicast) router or IGMP proxy generates these queries. The MTU value can be set manually, but it cannot exceed the bridge L2MTU or the lowest bridge port L2MTU. The default bridge MTU value without any bridge ports added is 1500. This property only has effect when RouterOS IPv6 package is enabled and igmp-snooping is set to yes.Maximum transmission unit, by default, the bridge will set MTU automatically and it will use the lowest MTU value of any associated bridge port.
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