9/6/2023 0 Comments Mikrotik loopback ip address![]() I'd suppose there were NAT rules, so even packets sent from the interface-state-independent address got src-nated to the address attached to the WAN interface when routed out through that interface. So the question is what traffic you were torching in the latter case and whether there were any NAT rules configured. What torch shows depends on the addresses in the packets, not on what address is attached to the interface. In MT RouterOS the recommended way to add a loopback interface for IPv4 is to create a new empty bridge interface: /interface bridge add namelobridge loopback address /ip address add address10.0.0.1/24 interfacelobridge. Even if the address fits into a subnet attached to some physical interface, Mikrotik will not respond ARP requests about that address even if they come through that physical interface. ![]() So a neighbor router only knows how to send a packet to that address if it has a route to it. To the second question - the interface-state-independent address only exists in the 元 domain. If there are no alternative paths in your network, there is no point in using interface-state-independent addresses. And you need that an outage of any link does not invalidate an IP address used by the dynamic routing protocols to talk to the router. It makes sense to use an "interface-state-independent" address in mesh topology networks with dynamic routing protocols, where you require path redundancy - if there is an outage on a link between nodes, the traffic gets routed via some other path instead. So the "interface-state-independent" address exists, but it is not attached to a loopback interface as such. From the console, I still have CLI commands to the ROS. So when you want to configure an IP address that will not depend on a state of any physical interface, you have to create a bridge interface with no member ports and attach the address to it. When my ROS does this, it can not even ping the loopback address 127.0.0.1 - it acts like all IP traffic is just turned off. There is a "real" loopback interface on Mikrotik too, but it is not made visible in the RouterOS configuration. So on bare Linux systems, long before bridges were implemented, people started attaching addresses they needed to stay active no matter what to a loopback interface, and from there the shortcut "loopback address" comes. interface trafic-eng set TE-to-R3 reoptimize-interval5s. To set up path re-optimization we need to specify interval. It can be done in two ways: manually - which is not what we need. Addresses attached to a physical interfaces become inactive if the interface they are attached to goes down. In case of static primary paths as in our case, we need to re-optimize the tunnel. The idea behind a "loopback address" is that this address is always active on the device. A random MAC address will be generated in this case.To the first question, I'd start from the fact that the popular name "loopback address" is technically wrong - it is a shortcut obfuscating the actual point. ipv6 address add address=2003::1/64 advertise=no interface=lobridgeĪlternative solution is to use a fake EoIP tunnel interface instead of bridge. untuk 255.255.255.0 adalah subnet yang akan di daftar atau sering di pakai /24. untuk 192.168.11.2 adalah ip yang akan di daftarkan. untuk perintah 'ip addr' berfungsi sebagai perintah menginput ip address. ![]() interface bridge add name=lobridge auto-mac=no admin-mac=01:00:00:00:01:00 untuk perintah 'int fa0/0' berfungsi sebagai perintah masuk ke interfaces 0/0. Since IPv6 link-local address is needed for IPv6 to function properly on an interface, this means that by default the empty bridge interface cannot be used as IPv6 loopback interface.Īdd an empty bridge, and specify bridge MAC address manually: MT RouterOS does not generate IPv6 link-local addresses on interfaces with zero MAC address (because of high address collision probability). A loopback interface is always up and allows. ip address add address=10.0.0.1/24 interface=lobridgeĮmpty bridge interface has zero MAC byte default. Loopback interfaces IP Address determines a routers OSPF Router ID. In MT RouterOS the recommended way to add a loopback interface for IPv4 is to create a new empty bridge interface: Explained how to create Loopback Interface in Mikrotik Router. Such addresses are useful, for example, as source addresses for TCP connections between two routers that have more that one physical interfaces between them. It can be used to hold addresses that belong to the "router itself" and not to any particular outgoing interface. Client (192.168.1.3) sends TCP-SYN to your external IP, Port 80 (123.123.123.1:80) Router sees port forwarding rule and forwards the packet to the server (192.168.1.2:80) without changing the source IP (192.168.1.3) Client waits for a SYN-ACK from the external IP. In some cases it is necessary to have a kind of loopback interface. ![]()
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