![]() ![]() Isn't the switch the only one aware of this address ? if not, how is ![]() This interface is always up, and will be reachable by whichever physical interface is up (depending on your security rules of course), so if you loose any interface you can still manage your router. Now, if you have a loopback interface with IP 172.16.0.1/32 address, you use this address to manage the device. This is more hassle, not very convenient, and it does not scale well. To avoid this you could allow management on both addresses. If for whatever reason the interface Ethernet1 is down or unreachable, you loose your ability to administer the device, despite the fact that it is still reachable on the 192.168.2.254 address. To administer the router, you could use 192.168.1.254/24 and so you configure your management station(s), your firewall rules, your monitoring system, etc. Now a layer 3 switch combine the functions of a router and a switch.Ī router, by nature, is attached to several networks, and has several IP addresses, one for each network it act as a router for (as a minimum). Note : some layer 2 switches can have several management IP addresses in different VLAN while other can only be configured with a single management address. This is not necessarily a loopback interface. ![]() Switch without any fear of loosing access to it misconfiguringĪ switch generally has a management IP address, which is linked to a virtual interface that can be bridged to any vlan for example, so you can choose in which VLAN the switch management is accessible. I've heard we can set a loopback address (W.X.Y.Z/32) and use it to configure the ![]()
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