0
What does this mean for a router an interface is up but its line protocol is down disabled?
Wiki User
∙ 12y ago
This may indicate a duplex mismatch between two devices. e.g. a switch and a router.
Change both to use auto, instead of hardcoding either half, or full
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
If you encounter a line protocol down message on a router interface what is is an indication of?
There is a problem with the interface at the data-link layer that prevents it from functioning properly
On a Cisco router what does it mean when the status is administratively up but protocol is down?
Ports on Cisco routers can be enabled or disabled by the router OS. "Administratively Up" simply means that the port has been enabled by the router's OS. If a port is enabled (Administratively Up) and the protocol is down, then there is a problem with communications over that port. Problems could one of many including; bad cable on the port, the far end device is down, the protocol configurations on the two connected device ports are not configured correctly to enable communications.
Line protocol in down then what you do?
there may be the issue with the layer 2 protocol like hdlc or ppp is not configured or wrongly configured if the interface is serial interface.
Cisco router 2801 serial port is manually down how you can enable this port?
router> enablerouter# configure terminalrouter(config) interface serial (interface number)router(config-if) no shutdownrouter(config-if) endrouter#substitute (interface number) for the actual int number.. eg serial 0/1you can find the number of the interface by using show interfaces from privileged mode
What do you mean by admin down in router serial interface?
admin down basically means that an adminstrator shutdown the interface for any number of reasons, and if the admin wanted to, they could bring it back up with the 'no shutdown' command.
Which option identifies the primary interface which would be used for initial configuration of a Cisco router?
The primary interface which would be used for initial configuration of a Cisco router exam is 200-120 In this exam you can get all router related details and also about the primary interface usage probelms and there solutions. To get this exam dump visit the link below... dumpspdf.com/200-120.html
Which piece of information is available from examining the output of the command show ip interface brief?
From the output of the "show ip interface brief" command, you can see the IP address, interface status (up or down), protocol status (up or down), and the method for obtaining the address (manual or dynamic) for each interface on the device.
How does vrrp work?
Virtual Router Redundancy Protocol (VRRP) enables you to set up a group of routers as a default gateway router (VRRP Group) for backup or redundancy purposes. This way, the PC clients can actually point to the IP address of the VRRP virtual router as their default gateway. If one of the master routers in the group goes down, one of the other routers can take over. Routers can function as master or backup routers, and you can actually configure up to 255 virtual routers on a router interface. Of course, there are platform constraints like router memory, for instance. Additionally, VRRP is intended for use with IPv4 routers only.
What steps are taken when forwadin an icmp packet?
For each router, the following steps occur: 1) The "access-group in" command is checked on the interface, and discards the packet if the rule tells it to do so. 2) The "TTL" field is decreased by 1. 3) If TTL is now 0, the router discards the packet and sends a reply packet back to the sender. 4) The packet's IP address is compared to the routing table to determine the next hop of the packet. 5) The router advises if the network or host is unreachable due to a down interface or no known route. 6) The router sends the packet to the outgoing interface's queue to be sent to the next hop. 7) The "access-group out" command is checked on the interface, and discards the packet if the rule tells it to do so. 8) The router sends the packet to the next hop.
What are two advantages of using loopback interface on a router with oSPF enabled?
loop back never goes down, helps maintaining adjacency of routers if used with routing protocols
What is line protocol is administratively down on a cisco router?
The message is something like "Serial 0/0 is up, line protocol is down". The first part refers to the physical connection (layer 1 of the OSI model), which works in this case; the second part refers to layer 2 of the OSI model (the serial networking protocol, like HDLC or PPP), which in this example doesn't work for some reason.
HSRP Configuration Cisco?
Hot standby router protocol. 2 different routers will have 2 different physical addresses, but you can give both of them a shared virtual address. only 1 router will answer on the virtual address at a time, but one goes down the other will take over.
