EOS DHCP-PD agent

This EOS agent allows to request a prefix from a DHCPv6 server RFC3633 and assign it to an interface to send out RAs to configure ipv6 addresses via SLAAC RFC4862.

We only support one /48 delegated prefix. This prefix can be assigned to any ipv6 enabled interface with an SLA id to create a /64 prefix for SLAAC. We support changing the RA prefix interface configuration while the agent is running, e.g. adding additional interfaces or changing the SLA id.

Usage

1. Copy content to switch, e.g. /mnt/flash/eos-dhcp-pd
2. For EOS release < 4.26.0 only: Copy sysdb file or create symlink, e.g.

ln -s /mnt/flash/eos-dhcp-pd/dhcppd.sysdb /usr/lib/SysdbMountProfiles/dhcppd.py

3. Start daemon from cli, e.g.

!
daemon DhcpPdEthernet1
   exec /mnt/flash/eos-dhcp-pd/dhcppd.py /mnt/flash/eos-dhcp-pd Ethernet1
   option Vlan1 value 1
   no shutdown
!

The example above sends DHCP-PD requests on Ethernet1 and assigns a /64 prefix to Vlan1 with SLA id 0x1. For example if the /48 prefix received from the DHCP server is fc00::/48 the resulting RA prefix on Vlan1 will be fc00:0:0:1::/64. You can add additional arguments to the option. The format is:

<slaId 16 bit hex> <arguments>

See "ipv6 nd prefix" command for available arguments