[Kea-users] DHCP4 Relay Information source

[Rui Pedro Caldeira]

Hello again, I came across a doubt when deploying kea in my test network.

I defined a subnet like the example below, and I declared the relay agent for the network (marked in bold). My question is which field of the packet does kea use to match against the relay agent IP I declared in my configuration file [the remote ID field of the option 82, The Source IP from where the packet was received (probably the IP address of the relay), ...].

Could you help me? Thank you,

Rui

-----//-------

    "subnet4": [

      {

        "option-data": [

          {

            "name": "routers",

            "code": 3,

            "space": "dhcp4",

            "csv-format": true,

            "data": ""

          }

        ],

        "reservations": [

          {

            "circuit-id": "",

            "ip-address": ""

          }

        ],

        "subnet": "",

        "relay": {

          "ip-address": "192.1.25.206"

        }

      }

    ]

  },

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[Jason Guy]

Hi Rui,

This should match the GI-addr field, set by the relay agent.

Cheers,

Jason

On Tue, Apr 17, 2018 at 10:56 AM, Rui Pedro Caldeira <[hidden email]> wrote:

Hello again, I came across a doubt when deploying kea in my test network.

I defined a subnet like the example below, and I declared the relay agent for the network (marked in bold). My question is which field of the packet does kea use to match against the relay agent IP I declared in my configuration file [the remote ID field of the option 82, The Source IP from where the packet was received (probably the IP address of the relay), ...].

Could you help me? Thank you,

Rui

-----//-------

    "subnet4": [

      {

        "option-data": [

          {

            "name": "routers",

            "code": 3,

            "space": "dhcp4",

            "csv-format": true,

            "data": ""

          }

        ],

        "reservations": [

          {

            "circuit-id": "",

            "ip-address": ""

          }

        ],

        "subnet": "",

        "relay": {

          "ip-address": "192.1.25.206"

        }

      }

    ]

  },

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[Francis Dupont]

I don't fully understand your question but DHCPv4 messages have a field
to carry the relay address (aka giaddr).

Regards

Francis Dupont <[hidden email]>
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[Rui Pedro Caldeira]

Hello all and thank you for the fast response. It was very helpfull :)

So what i'm understanding is that kea only looks to the circuit id part of the option 82 ignoring the remote id part, am i correct?

Best regards,

Rui

On Tue, Apr 17, 2018 at 4:43 PM, Francis Dupont <[hidden email]> wrote:

I don't fully understand your question but DHCPv4 messages have a field
to carry the relay address (aka giaddr).

Regards

Francis Dupont <[hidden email]>

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Kea-users mailing list
[hidden email]
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[Rui Pedro Caldeira]

Hello all and thank you for the fast response. It was very helpfull :)

So what i'm understanding is that kea only looks to the circuit id part of the option 82 ignoring the remote id part, am i correct?

Best regards,

Rui

On Tue, Apr 17, 2018 at 4:43 PM, Francis Dupont <[hidden email]> wrote:

I don't fully understand your question but DHCPv4 messages have a field
to carry the relay address (aka giaddr).

Regards

Francis Dupont <[hidden email]>

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Kea-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/kea-users