Quiz Entry - updated: 2026.07.14
What commands verify DHCPv6 (Dynamic Host Configuration Protocol version 6) server operation on a Cisco router?
show ipv6 dhcp pool shows pool parameters and active client count; show ipv6 dhcp binding shows individual client address assignments (stateful only).
| Command | What It Shows |
|---|---|
show ipv6 dhcp pool |
Pool name, address prefix, DNS (Domain Name System) server, domain name, active client count |
show ipv6 dhcp binding |
Client LLA (Link-Local Address), DUID (DHCP Unique Identifier), assigned GUA (Global Unicast Address), lease timers (stateful only) |
show ipv6 dhcp interface |
Which interfaces have DHCPv6 pools bound, relay mode status |
Example show ipv6 dhcp pool output:
DHCPv6 pool: IPV6-STATEFUL
Address allocation prefix: 2001:DB8:ACAD:1::/64
DNS server: 2001:4860:4860::8888
Domain name: example.com
Active clients: 2
Example show ipv6 dhcp binding output:
- Shows each client's LLA and DUID (DHCP Unique Identifier)
- Shows the assigned GUA, preferred/valid lifetimes, and expiration date
Key point: show ipv6 dhcp binding only shows entries for stateful DHCPv6 — a stateless server doesn't maintain bindings because it doesn't assign addresses.
Go deeper:
DHCPv6 — DUID (Wikipedia) — the client LLA and DUID identifiers that appear in show ipv6 dhcp binding.