Ccna routing and Switching Complete Study Guide

sh ipv6 neighbors

IPv6 Address                          Age Link-layer Addr 

State Interface

FE80::21A:6DFF:FE64:9B3                 0 001a.6c46.9b09  DELAY Fa0/1

2001:DB8:3C4D:2:21A:6DFF:FE64:9B3       0 001a.6c46.9b09  REACH Fa0/1

Let’s take a minute to talk about the possible states that a resolved address shows us:

INCMP (incomplete)    Address resolution is being performed on the entry. A neighbor 

solicitation message has been sent, but the neighbor message has not yet been received.

REACH (reachable)    Positive confirmation has been received confirming that the path to 

the neighbor is functioning correctly. REACH is good!

STALE    The state is STALE when the interface has not communicated within the neighbor 

reachable time frame. The next time the neighbor communicates, the state will change back 

to REACH.

DELAY    Occurs after the STALE state, when no reachability confirmation has been received 

within what’s known as the DELAY_FIRST_PROBE_TIME. This means that the path was 

functioning but it hasn’t had communication within the neighbor reachable time frame.

PROBE    When in PROBE state, the configured interface is resending a neighbor solicitation 

and waiting for a reachability confirmation from a neighbor.

We can verify our default gateway with IPv6 with the 

ipconfig

 command like this:

C:\Users\Todd Lammle>

ipconfig

   Connection-specific DNS Suffix  . : localdomain

   IPv6 Address. . . . . . . . . . . : 2001:db8:3c4d:3:ac3b:2ef:1823:8938