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https://issues.apache.org/jira/browse/TS-775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Igor Galić updated TS-775:
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Fix Version/s: 2.1.9
> Disable cluster autodiscovery via multicast when clustering is disabled (as
> is by default)
> ------------------------------------------------------------------------------------------
>
> Key: TS-775
> URL: https://issues.apache.org/jira/browse/TS-775
> Project: Traffic Server
> Issue Type: Bug
> Components: Clustering
> Reporter: Igor Galić
> Fix For: 2.1.9
>
>
> By default clustering is disabled, however when a freshly installed instance
> starts up, it tries to discover potential clustering partners via multicast
> none the less. This is evident with Ubuntu when "ufw" is active, which blocks
> multicast by default:
> {noformat}
> May 12 23:11:46 pheme kernel: [549586.656109] [UFW BLOCK] IN=eth1 OUT=
> MAC=01:00:5e:00:00:01:fe:54:00:24:07:4d:08:00 SRC=0.0.0.0 DST=224.0.0.1
> LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2
> May 12 23:11:46 pheme kernel: [549586.656131] [UFW BLOCK] IN=eth0 OUT=
> MAC=01:00:5e:00:00:01:00:24:21:ef:35:90:08:00 SRC=0.0.0.0 DST=224.0.0.1
> LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2
> {noformat}
> When clustering is disabled, as it is by default, we should *not* try to do
> any kind of discovery either.
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