Home > Articles > Cisco Network Technology > IP Communications/VoIP > CCNA Portable Command Guide: IPv6

CCNA Portable Command Guide: IPv6

Chapter Description

This chapter provides information and commands concerning a number of IPv6-related topics such as assigning IPv6 addresses to interfaces, IPv6 tunnels, and IPv6 ping.

IPv6 Ping

To diagnose basic network connectivity using IPv6 to the specified address, enter the following command:

Router#ping ipv6 2001:db8::3/64

The following characters can be displayed as output when using PING in IPv6.

Character

Description

!

Each exclamation point indicates receipt of a reply.

.

Each period indicates that the network server timed out while waiting for a reply.

?

Unknown error.

@

Unreachable for unknown reason.

A

Administratively unreachable. Usually means that an access control list (ACL) is blocking traffic.

B

Packet too big.

H

Host unreachable.

N

Network unreachable (beyond scope).

P

Port unreachable.

R

Parameter problem.

T

Time exceeded.

U

No route to host.