Troubleshooting
Problem
Recently discovered that some services running in IBM Cloud Private(ICP) cannot reach an external service that was in the 172.17.0.0/16 segment. We noticed that the docker network bridge inside the hosts are using this same segment.
For example,
[root@icp-beta-wrk-04 ~]# ip r
10.1.248.0/26 via 10.15.2.36 dev tunl0 proto bird onlink
10.1.252.192/26 via 10.15.2.21 dev tunl0 proto bird onlink
10.15.3.0/24 dev ens192 proto kernel scope link src 10.15.2.34 metric 100
172.20.0.0/16 dev docker0 proto kernel scope link src 172.20.0.1
Is this network bridge used in any way? Can the docker network bridge be deleted? Can the docker network bridge be changed otherwise?
[root@icp-beta-wrk-04 ~]# ip r
10.1.248.0/26 via 10.15.2.36 dev tunl0 proto bird onlink
10.1.252.192/26 via 10.15.2.21 dev tunl0 proto bird onlink
10.15.3.0/24 dev ens192 proto kernel scope link src 10.15.2.34 metric 100
172.20.0.0/16 dev docker0 proto kernel scope link src 172.20.0.1
Is this network bridge used in any way? Can the docker network bridge be deleted? Can the docker network bridge be changed otherwise?
Document Location
Worldwide
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Document Information
Modified date:
08 March 2021
UID
ibm16427021