DHCP\_RELEASE(1) General Commands Manual DHCP\_RELEASE(1)

# [NAME](#NAME)

dhcp\_release6 - Release a DHCPv6 lease on a the local dnsmasq DHCP server.

# [SYNOPSIS](#SYNOPSIS)

**dhcp\_release6 --iface <interface> --client-id <client-id> --server-id** server-id --iaid <iaid> --ip <IP> \[--dry-run] \[--help]

# [DESCRIPTION](#DESCRIPTION)

A utility which forces the DHCP server running on this machine to release a DHCPv6 lease.

## [OPTIONS](#OPTIONS)

[-a, --ip](#a,)

IPv6 address to release.

[-c, --client-id](#c,)

Colon-separated hex string representing DHCPv6 client id. Normally it can be found in leases file both on client and server.

[-d, --dry-run](#d,)

Print hexadecimal representation of generated DHCPv6 release packet to standard output and exit.

[-h, --help](#h,)

print usage information to standard output and exit.

[-i, --iaid](#i,)

Decimal representation of DHCPv6 IAID. Normally it can be found in leases file both on client and server.

[-n, --iface](#n,)

Network interface to send a DHCPv6 release packet from.

[-s, --server-id](#s,)

Colon-separated hex string representing DHCPv6 server id. Normally it can be found in leases file both on client and server.

# [NOTES](#NOTES)

MUST be run as root - will fail otherwise.

# [LIMITATIONS](#LIMITATIONS)

Only usable on IPv6 DHCP leases.

# [SEE ALSO](#SEE_ALSO)

[**dnsmasq**(8)](/man/os/dnsmasq/dnsmasq.8)

# [AUTHOR](#AUTHOR)

This manual page was written by Simon Kelley <simon@thekelleys.org.uk>.

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Document: dhcp_release6(1) from dnsmasq 2.93-r2 (Chainguard OS)
Source: https://thekelleys.org.uk/git/dnsmasq.git