How to configure ipv4 Link-Local on Linux with systemd-networkd without violating RFC3927 specifications?
I'm using an embedded device with Linux 4.9 and systemd.
I configured systemd-networkd in this way:
[Match]
Name=eth0
[Network]
DHCP=v4
[DHCPv4]
UseHostname=false
How can I setup Link-Local only when my device doesn't receive an IP address?
I know that I can use something like mdns, avahi and so on, but I'm trying to talk about this topic in a general way, to understand the logic and all possible alternatives.
PS: If required, I can replace also systemd-networkd with something else. I'm searching for the best option RFC3927-compliant.
systemd dhcp systemd-networkd avahi mdns
edited Dec 10 at 22:13
Rui F Ribeiro
38.8k1479128
asked Dec 10 at 16:56
Stefano Cappa
1161
add a comment |
I'm using an embedded device with Linux 4.9 and systemd.
I configured systemd-networkd in this way:
[Match]
Name=eth0
[Network]
DHCP=v4
[DHCPv4]
UseHostname=false
How can I setup Link-Local only when my device doesn't receive an IP address?
I know that I can use something like mdns, avahi and so on, but I'm trying to talk about this topic in a general way, to understand the logic and all possible alternatives.
PS: If required, I can replace also systemd-networkd with something else. I'm searching for the best option RFC3927-compliant.
systemd dhcp systemd-networkd avahi mdns
edited Dec 10 at 22:13
Rui F Ribeiro
38.8k1479128
asked Dec 10 at 16:56
Stefano Cappa
1161
Is it actually necessary for the interface to not have a Link-Local IPv4 address when it receives another address? Or in other words, have you tried just enabling the Link-Local address setup always, regardless of whether or not the DHCP will be successful?
– telcoM
Dec 10 at 17:59
1
Yes I tried to enable LinkLocal and it's working, however I have to pass a certification procedure and requirements say that I need a Link Local address only after some second of delay (60000 ms). Also, RFC3927 specify behaviour about conflicts and so on.
– Stefano Cappa
Dec 10 at 18:59
add a comment |
I'm using an embedded device with Linux 4.9 and systemd.
I configured systemd-networkd in this way:
[Match]
Name=eth0
[Network]
DHCP=v4
[DHCPv4]
UseHostname=false
How can I setup Link-Local only when my device doesn't receive an IP address?
I know that I can use something like mdns, avahi and so on, but I'm trying to talk about this topic in a general way, to understand the logic and all possible alternatives.
PS: If required, I can replace also systemd-networkd with something else. I'm searching for the best option RFC3927-compliant.
systemd dhcp systemd-networkd avahi mdns
edited Dec 10 at 22:13
Rui F Ribeiro
38.8k1479128
asked Dec 10 at 16:56
Stefano Cappa
1161
I'm using an embedded device with Linux 4.9 and systemd.
I configured systemd-networkd in this way:
[Match]
Name=eth0
[Network]
DHCP=v4
[DHCPv4]
UseHostname=false
How can I setup Link-Local only when my device doesn't receive an IP address?
I know that I can use something like mdns, avahi and so on, but I'm trying to talk about this topic in a general way, to understand the logic and all possible alternatives.
PS: If required, I can replace also systemd-networkd with something else. I'm searching for the best option RFC3927-compliant.
systemd dhcp systemd-networkd avahi mdns
systemd dhcp systemd-networkd avahi mdns
edited Dec 10 at 22:13
Rui F Ribeiro
38.8k1479128
asked Dec 10 at 16:56
Stefano Cappa
1161
edited Dec 10 at 22:13
Rui F Ribeiro
38.8k1479128
asked Dec 10 at 16:56
Stefano Cappa
1161
edited Dec 10 at 22:13
Rui F Ribeiro
38.8k1479128
edited Dec 10 at 22:13
Rui F Ribeiro
38.8k1479128
edited Dec 10 at 22:13
Rui F Ribeiro
38.8k1479128
38.8k1479128
asked Dec 10 at 16:56
Stefano Cappa
1161
asked Dec 10 at 16:56
Stefano Cappa
1161
asked Dec 10 at 16:56
Stefano Cappa
1161
1161
Is it actually necessary for the interface to not have a Link-Local IPv4 address when it receives another address? Or in other words, have you tried just enabling the Link-Local address setup always, regardless of whether or not the DHCP will be successful?
– telcoM
Dec 10 at 17:59
1
Yes I tried to enable LinkLocal and it's working, however I have to pass a certification procedure and requirements say that I need a Link Local address only after some second of delay (60000 ms). Also, RFC3927 specify behaviour about conflicts and so on.
– Stefano Cappa
Dec 10 at 18:59
add a comment |
Is it actually necessary for the interface to not have a Link-Local IPv4 address when it receives another address? Or in other words, have you tried just enabling the Link-Local address setup always, regardless of whether or not the DHCP will be successful?
– telcoM
Dec 10 at 17:59
1
Yes I tried to enable LinkLocal and it's working, however I have to pass a certification procedure and requirements say that I need a Link Local address only after some second of delay (60000 ms). Also, RFC3927 specify behaviour about conflicts and so on.
– Stefano Cappa
Dec 10 at 18:59
Is it actually necessary for the interface to not have a Link-Local IPv4 address when it receives another address? Or in other words, have you tried just enabling the Link-Local address setup always, regardless of whether or not the DHCP will be successful?
– telcoM
Dec 10 at 17:59
Is it actually necessary for the interface to not have a Link-Local IPv4 address when it receives another address? Or in other words, have you tried just enabling the Link-Local address setup always, regardless of whether or not the DHCP will be successful?
– telcoM
Dec 10 at 17:59
1
1
Yes I tried to enable LinkLocal and it's working, however I have to pass a certification procedure and requirements say that I need a Link Local address only after some second of delay (60000 ms). Also, RFC3927 specify behaviour about conflicts and so on.
– Stefano Cappa
Dec 10 at 18:59
Yes I tried to enable LinkLocal and it's working, however I have to pass a certification procedure and requirements say that I need a Link Local address only after some second of delay (60000 ms). Also, RFC3927 specify behaviour about conflicts and so on.
– Stefano Cappa
Dec 10 at 18:59
add a comment |
active
oldest
votes
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "106"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f487165%2fhow-to-configure-ipv4-link-local-on-linux-with-systemd-networkd-without-violatin%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
active
oldest
votes
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f487165%2fhow-to-configure-ipv4-link-local-on-linux-with-systemd-networkd-without-violatin%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Is it actually necessary for the interface to not have a Link-Local IPv4 address when it receives another address? Or in other words, have you tried just enabling the Link-Local address setup always, regardless of whether or not the DHCP will be successful?
– telcoM
Dec 10 at 17:59
1
Yes I tried to enable LinkLocal and it's working, however I have to pass a certification procedure and requirements say that I need a Link Local address only after some second of delay (60000 ms). Also, RFC3927 specify behaviour about conflicts and so on.
– Stefano Cappa
Dec 10 at 18:59