Sending Echo Request Packets to the IPv6 Address

You can send an ICMP echo request packet to the specified IPv6 address for determining reachability by using the ping command.

You can use the source interface keywords to specify a source interface other than the one from which the probe originates. You can use the source address keywords to specify a source IPv6 address other than the one from which the probe originates.

The following characters can appear in the display after you issue the ping command:

• !—Reply received
• .—Timed out while waiting for a reply
• ?—Unknown packet type
• A—Admin unreachable
• b—Packet too big
• H—Host unreachable
• N—Network unreachable
• P—Port unreachable
• p—Parameter problem
• S—Source beyond scope
• t—Hop limit expired (TTL expired)

To send an ICMP echo request packet to the specific IPv6 address:

• Issue the ping command in Privileged Exec mode.
  host1#ping ipv6 1::1