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Diffstat (limited to 'docs/configuration/service/dhcp-relay.rst')
| -rw-r--r-- | docs/configuration/service/dhcp-relay.rst | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/docs/configuration/service/dhcp-relay.rst b/docs/configuration/service/dhcp-relay.rst index 5ce22edb..43abf254 100644 --- a/docs/configuration/service/dhcp-relay.rst +++ b/docs/configuration/service/dhcp-relay.rst @@ -20,8 +20,20 @@ Configuration .. cfgcmd:: set service dhcp-relay interface <interface> - Interfaces that participate in the DHCP relay process, including the uplink - to the DHCP server. + Interfaces that participate in the DHCP relay process. If this command is + used, at least two entries of it are required: one for the interface that + captures the dhcp-requests, and one for the interface to forward such + requests. A warning message will be shown if this command is used, since + new implementations should use ``listen-interface`` and + ``upstream-interface``. + +.. cfgcmd:: set service dhcp-relay listen-interface <interface> + + Interface for DHCP Relay Agent to listen for requests. + +.. cfgcmd:: set service dhcp-relay upstream-interface <interface> + + Interface for DHCP Relay Agent to forward requests out. .. cfgcmd:: set service dhcp-relay server <server> @@ -47,7 +59,7 @@ Options DHCP packet size surpasses this value it will be forwarded without appending relay agent information. Range 64...1400, default 576. -.. cfgcmd:: set service dhcp-relay relay-options relay-agents-packet +.. cfgcmd:: set service dhcp-relay relay-options relay-agents-packets <append | discard | forward | replace> Four policies for reforwarding DHCP packets exist: @@ -70,8 +82,8 @@ Example * Listen for DHCP requests on interface ``eth1``. * DHCP server is located at IPv4 address 10.0.1.4 on ``eth2``. -* Router receives DHCP client requests on ``eth1`` and relays them to the server - at 10.0.1.4 on ``eth2``. +* Router receives DHCP client requests on ``eth1`` and relays them to the + server at 10.0.1.4 on ``eth2``. .. figure:: /_static/images/service_dhcp-relay01.png :scale: 80 % @@ -84,6 +96,19 @@ The generated configuration will look like: .. code-block:: none show service dhcp-relay + listen-interface eth1 + upstrem-interface eth2 + server 10.0.1.4 + relay-options { + relay-agents-packets discard + } + +Also, for backwards compatibility this configuration, which uses generic +interface definition, is still valid: + +.. code-block:: none + + show service dhcp-relay interface eth1 interface eth2 server 10.0.1.4 @@ -124,7 +149,7 @@ Configuration Options ------- -.. cfgcmd:: set service dhcpv6-relay max-hop-count 'count' +.. cfgcmd:: set service dhcpv6-relay max-hop-count <count> Set maximum hop count before packets are discarded, default: 10 |