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Is up line protocol is down?
FastEthernet0 is up, line protocol is down: In this case, Physical layer is operational. The line protocol being down indicates a clocking or framing problem. Ethernet0 is administratively down, line protocol is down: This output indicates that a local interface has been manually shut down using the shutdown command.
What does line protocol up mean?
Protocol refers to “Line Protocol”, which is a Cisco way of saying “the connection”. Basically, up/down means the port is available for a cable/connection, but doesn’t have one. Check the cable, or other computer. https://superuser.com/questions/338112/cisco-switch-link-status-up-protocol-down/338120#338120.
Why are some FastEthernet ports on the switches are up and down?
Why are some FastEthernet ports on the switches are up and others are down? The FastEthernet ports are up when cables are connected to the ports unless they were manually shutdown by the administrators. Otherwise, the ports would be down.
How do I bring up an interface in Linux?
Two methods can be used to bring interfaces up or down.
- 2.1. Using “ip” Usage: # ip link set dev up # ip link set dev down. Example: # ip link set dev eth0 up # ip link set dev eth0 down.
- 2.2. Using “ifconfig” Usage: # /sbin/ifconfig up # /sbin/ifconfig down.
Which is VLAN is still on line protocol down?
Connected to 3 2960; port trunks configured, running show vlan command also shows that I can see the vlan I’ve created to the L3 Switch (Vlan 4 is the one that is still on line protocol down)
How to make a VLAN interface come up?
Mind you that the interface or trunk need to be up for the VLAN interfaces to come up. You can configure access ports assigned to those VLAN’s and use the command no keepalive command to bring those ports up, without having something actually connected to the physical port.
How can keep it up without having a host connected in VLAN 4?
How can keep it up without having a host connected in VLAN 4? for Vlans 1 to 3 even if I disconnected the hosts for it, its still showing up/up now, which makes it more confusing.. So the “VLAN” needs to be “up” on a single interface before the SVI will come up. Put the VLAN on another trunk port or on an access port.
How to kill off a Cisco VLAN line?
Once that is done, do a “sh vlan brief” again. Make sure you have no ports configured for the VLAN you want to destroy (18). Then kill off that VLAN and reassign the ports to the new VLANs. Are you smarter than most IT pros? Take the Daily Challenge » Cisco IT Security Makeover: 2 $500 Gift Cards, Weekly $100 Gift Car…