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When I inquire the statue of a two-node Pacemaker/Corosync cluster with crm corosync status I get the following result (excerpt):

LINK ID 0
    addr    = 10.0.1.196
    status:
        node 0: link enabled:0  link connected:0
        node 1: link enabled:1  link connected:1
LINK ID 1
    addr    = xx.yy.zz.15
    status:
        node 0: link enabled:1  link connected:1
        node 1: link enabled:0  link connected:1

This is for Corosync 3.0.1 with Krononsnet and two parallel links underneath. The cluster is behaving normally with apparent full connectivity between both nodes (e.g. Nodes: 2, Quorate: yes).

I am a bit surprised by several values zero shown for enabled and connected. What is the exact definition of those states and how may I did deeper to understand a situation like this? (From looking at these values alone I would judge that there may be a serious issue with cluster networking).

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