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BZ-2109453 adding note on client and subnet

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This commit is contained in:
Kevin Quinn
2022-07-21 15:02:36 +01:00
committed by openshift-cherrypick-robot
parent b3463d8307
commit c9ebdb2062
1 changed files with 6 additions and 2 deletions
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8
modules/nw-metallb-layer2.adoc
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@@ -7,8 +7,12 @@
[id="nw-metallb-layer2_{context}"]
= MetalLB concepts for layer 2 mode
In layer 2 mode, the `speaker` pod on one node announces the external IP address for a service to the host network.
From a network perspective, the node appears to have multiple IP addresses assigned to a network interface.
In layer 2 mode, the `speaker` pod on one node announces the external IP address for a service to the host network.
From a network perspective, the node appears to have multiple IP addresses assigned to a network interface.
[NOTE]
====
Since layer 2 mode relies on ARP and NDP, the client must be on the same subnet of the nodes announcing the service in order for MetalLB to work. Additionally, the IP address assigned to the service must be on the same subnet of the network used by the client to reach the service.
====
The `speaker` pod responds to ARP requests for IPv4 services and NDP requests for IPv6.