Serial link is up line protocol is down

Is it a point to point link? Regards , Sinjish. Abhishek Sen Posted November 29, 0 Comments. Hi Karthi, It means there is no keepalives, means the link could not carry the signal. Register or Login. Welcome back! Sign in with Email. Reset Your Password We'll send an email with a link to reset your password. Stay ahead! Get the latest news, expert insights and market research, tailored to your interests. Sign up with Email. Sign in with email Enter the email address associated with your account.

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Accept all cookies Customize settings. A bit explanation shows the same is due to data link layer encapsulation mismatch , as I said earlier:. This post is old but I suspect you were dealing with a cabling issue. The straight-through link appears as a dark-continuous link while the cross-over appears as dark-dotted link.

Optionally, choose also the orange wriggly link which automatically selects the appropriate media-type. Just make sure that both sides of the link have same duplex settings. I think that's bug in packet tracer. Remember PT has some limitation. I used before when I was working with PT activity and doesn't give me all the points. If you encounter a technical issue on the site, please open a support case.

Communities: Chinese Japanese Korean. All Rights Reserved. The Cisco Learning Network. View This Post. Edited February 16, at AM. Krishnapriya, You need to configure ip address on both gigabit ports each of routers. Hi there! Regards Sagar. There is a configuration problem in the local or remote router. The remote router might not be sending the keep-alives.