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|
############################
DHCP Relay trough GRE-Bridge
############################
| Testdate: 2021-12-22
| Version: 1.3.0
| Upgrade Version: 1.4-rolling-202112211328
This simple structure shows how to configure a DHCP Relay over a GRE Bridge
interface.
********
Topology
********
The topology has 3 VyOS routers and one client. Between the DHCP Server and
the DHCP Relay is a GRE tunnel. The `transport` VyOS represent a large
Network.
.. image:: _include/topology.png
:alt: Ansible Example topology image
*************
Configuration
*************
First, we configure the transport network and the Tunnel interface.
Transport:
.. literalinclude:: _include/transport.conf
:language: none
DHCP-Server
.. literalinclude:: _include/dhcp-server.conf
:language: none
:lines: 1-8
DHCP-Relay
.. literalinclude:: _include/dhcp-relay.conf
:language: none
:lines: 1-8
After this, we need the DHCP-Server and Relay configuration.
To get a testable result, we just have one IP in the DHCP range.
Expand it as you need it.
DHCP-Server
.. literalinclude:: _include/dhcp-server.conf
:language: none
:lines: 9-13
DHCP-Relay
.. literalinclude:: _include/dhcp-relay.conf
:language: none
:lines: 9-10
***************
Test the result
***************
Ping the Client from the DHCP Server.
.. code-block:: none
vyos@dhcp-server:~$ ping 192.168.0.30 count 4
PING 192.168.0.30 (192.168.0.30) 56(84) bytes of data.
64 bytes from 192.168.0.30: icmp_seq=1 ttl=63 time=0.845 ms
64 bytes from 192.168.0.30: icmp_seq=2 ttl=63 time=1.21 ms
64 bytes from 192.168.0.30: icmp_seq=3 ttl=63 time=0.895 ms
64 bytes from 192.168.0.30: icmp_seq=4 ttl=63 time=1.27 ms
--- 192.168.0.30 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 7ms
rtt min/avg/max/mdev = 0.845/1.054/1.271/0.187 ms
And show all DHCP Leases
.. code-block:: none
vyos@dhcp-server:~$ show dhcp server leases
IP address Hardware address State Lease start Lease expiration Remaining Pool Hostname
------------ ------------------ ------- ------------------- ------------------- ----------- ---------- ----------
192.168.0.30 00:50:79:66:68:05 active 2021/12/22 15:27:38 2021/12/23 15:27:38 23:59:17 DHCPTun100 VPCS
|
