Cisco interface manual down

 · Interface down/down issue. Hi everyone. I'm having some problems with an interface of my cisco router, actually, with any interface. I have 2 internet connections in the place where the router is, one with DHCP and the other with static public IP address. When I connect the router to the public IP, te interface goes Status down, protocol down Estimated Reading Time: 6 mins. Hi Phil, Your understanding is mostly correct. A couple notes: 1) sh ip int bri is about vlan interfaces and not about vlans. 2) Method refers to how the current IP address of the interface was assigned: from the command line (manual), or startup-config (NVRAM), or automatically (DHCP), etc. Expand Post.  · If the output of the show interfaces pos command indicates that the serial line is up but the line protocol is down, use loopback tests to determine the source of the problem. Perform a local loop test first, and then a remote test. Refer to Understanding Loopback Modes on Cisco Routers for guidance.

Method Status Protocol FastEthernet0/0 YES NVRAM up down Serial0/0 unassigned YES NVRAM administratively down down R1#show controllers serial 0/0 Interface Serial0/0 Hardware is PowerQUICC MPC DTE V clocks stopped. idb at 0x82B4F5F8, driver data structure at 0x82B56D1C --More-- R1#. Interface down/down issue. Hi everyone. I'm having some problems with an interface of my cisco router, actually, with any interface. I have 2 internet connections in the place where the router is, one with DHCP and the other with static public IP address. When I connect the router to the public IP, te interface goes Status down, protocol down. Cisco ethernet interfaces are normally down / down if they don't have a link. If you're seeing up / down, the most likely causes are: Cable fault; Speed mismatch (I personally haven't seen a duplex mismatch bring an intf up / down) is cable that connected to the local interface, but not connected to the far end switch, will cause that situation?

ciscoasa# show interface ip brief Interface IP-Address OK? Method Status Protocol Ethernet0/0 YES manual up up Ethernet0/1 YES manual up up Ethernet0/2 unassigned YES unset administratively down down Ethernet0/3 unassigned YES unset administratively down down Internal-Data0/0 unassigned YES unset administratively down up Management0/0 YES manual up up GigabitEthernet1/0 unassigned YES unset administratively down down GigabitEthernet1/1 unassigned YES unset. 1st Post. Vlan is down, line protocol is down. it usually happens when we haven't created any vlan n just applied command. # interface vlan xxx. # ip address x.x.x.x y.y.y.y. As if you delete your vlan 18 before unassigning the port associated with this vlan, all port will go in err-disable state. If the output of the show interfaces pos command indicates that the serial line is up but the line protocol is down, use loopback tests to determine the source of the problem. Perform a local loop test first, and then a remote test. Refer to Understanding Loopback Modes on Cisco Routers for guidance.