no keepalive

Hi all

Can anyone briefly tell me what (No keepalive) and ( No shutdown)
and (No ip direct-broadcast) means

Thank you


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Keepalives are packets exchanged between routers in order to check if communications are up and running through designated interfaces. Sometimes keepalives are not desirable - broadcast interfaces, for example - and "no keepalive" disables this function.
Keepalive is an interface command, and should match the configuration on the interfaces of the routers on remote end of each interface of a router.

When you configure "no shutdown" on an interface, you activate it for usage.

"no ip direct-broadcast" disables directed broadcasts, which are packets sent to broadcast address of that interface subnet. For example, if that interface is configured with IP address, packets sent to and are dropped through an interface configured with "no ip direct-broadcast".
See here for an explanation of why one shoud disable directed broadcasts:

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