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Bug 1893670

Summary:	mDNS publish flooding
Product:	OpenShift Container Platform	Reporter:	kseremet
Component:	Networking	Assignee:	Ben Nemec <bnemec>
Networking sub component:	mDNS	QA Contact:	Victor Voronkov <vvoronko>
Status:	CLOSED DUPLICATE	Docs Contact:
Severity:	low
Priority:	low	CC:	aos-bugs, rfredette
Version:	4.6
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-02 17:32:50 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description kseremet 2020-11-02 10:46:21 UTC

Description of problem:
I have a fairly default install of OCP4.6 using IPI on VMware vSphere 6.7. I noticed a lot more activity on the switches post installation, and now I realize that mDNS publisher is announcing the same servers over and over again pretty much every second or close to that.  I see records like this (filtered announcements of a single node for clarity):

10:11:27.655675 IP6 fe80::250:56ff:febf:2d53.mdns > ff02::fb.mdns: 45993*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.655793 IP 192.168.191.147.mdns > 224.0.0.251.mdns: 2635*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.655845 IP6 fe80::250:56ff:febf:2d53.mdns > ff02::fb.mdns: 2635*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.790112 IP 192.168.191.147.mdns > 224.0.0.251.mdns: 31423*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.790257 IP6 fe80::250:56ff:febf:2d53.mdns > ff02::fb.mdns: 31423*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.792502 IP 192.168.191.147.mdns > 224.0.0.251.mdns: 31423*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.792584 IP6 fe80::250:56ff:febf:2d53.mdns > ff02::fb.mdns: 31423*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.793716 IP 192.168.191.147.mdns > 224.0.0.251.mdns: 28179*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.794466 IP6 fe80::250:56ff:febf:2d53.mdns > ff02::fb.mdns: 28179*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.795112 IP 192.168.191.147.mdns > 224.0.0.251.mdns: 28179*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:27.795188 IP6 fe80::250:56ff:febf:2d53.mdns > ff02::fb.mdns: 28179*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:28.331664 IP 192.168.191.147.mdns > 224.0.0.251.mdns: 50581*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:28.331745 IP6 fe80::250:56ff:febf:2d53.mdns > ff02::fb.mdns: 50581*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:28.332127 IP 192.168.191.147.mdns > 224.0.0.251.mdns: 55124*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:28.332203 IP6 fe80::250:56ff:febf:2d53.mdns > ff02::fb.mdns: 55124*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:28.332759 IP 192.168.191.147.mdns > 224.0.0.251.mdns: 50581*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)
10:11:28.332824 IP6 fe80::250:56ff:febf:2d53.mdns > ff02::fb.mdns: 50581*- [0q] 1/0/3 PTR emretst Workstation-emretst-plc5g-master-2._workstation._tcp.local. (168)


Version-Release number of selected component (if applicable):
4.4, 4.5 & 4.6

How reproducible:
Always

Steps to Reproduce:
1. Deploy OCP 4.x using IPI either on VMware or RHV
2. Monitor mDNS announcements from nodes using: tcpdump -n -s0  port 5353 and udp
3.

Actual results:


Expected results:
Default TTL is set as 3200 seconds in mdns-publisher configuration file and node addition/deletion is not that frequent on most on-prem clusters.
There should be a way to set some interval between consecutive mdns announcements.

Additional info:

Comment 1 Andrew McDermott 2020-11-03 17:27:18 UTC

We're using port 5353 for DNS on the cluster so it shouldn't be confused with actual mDNS.
We see a lot of IP6 - is this an IPI installation with an IPv6 address on the node itself?

Comment 2 kseremet 2020-11-12 19:48:05 UTC

Hi Andrew,

I used port 5353 when filtering packets because mDNS should work on this udp port as per https://en.wikipedia.org/wiki/Multicast_DNS#Packet_structure
IPv4 address 224.0.0.251 or IPv6 address ff02::fb and UDP port 5353 seems to be used when publishing over mDNS.

Here is another test:

1-) After connecting to one of my nodes using ssh I started toolbox container.
2-) Listing multicast addresses on primary interface:

[root@emretst-cz7df-master-0 /]# ip maddr show ens192
2:	ens192
	link  01:00:5e:00:00:01
	link  33:33:00:00:00:01
	link  33:33:ff:bf:40:0b
	link  01:00:5e:00:00:fb
	link  33:33:00:00:00:fb
	link  01:00:5e:00:00:12
	link  33:33:00:00:00:02 users 2
	link  33:33:ff:00:00:00
	inet  224.0.0.18
	inet  224.0.0.251
	inet  224.0.0.1
	inet6 ff02::1:ff00:0
	inet6 ff05::2
	inet6 ff01::2
	inet6 ff02::2
	inet6 ff02::fb
	inet6 ff02::1:ffbf:400b
	inet6 ff02::1
	inet6 ff01::1


3-) Capturing all udp packets on ipv4 mcast address 224.0.0.251 for 2 seconds.

As you can see 141 packets captured in just 2 seconds in this small 6-node cluster and all of this is mDNS traffic. The same hosts are publishing same names and addresses over and over again. When the number of nodes increases then the amount of traffic becomes quite high. One of my customers currently seeing as much as 9Mbit/s mDNS traffic and really worried about it!

[root@emretst-cz7df-master-0 /]# timeout 2 tcpdump -i ens192 -n host 224.0.0.251
dropped privs to tcpdump
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens192, link-type EN10MB (Ethernet), capture size 262144 bytes
19:31:32.623252 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 59905 PTR (QM)? _etcd-server-ssl._tcp.local. (45)
19:31:32.623373 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 45904 PTR (QM)? _etcd-server-ssl._tcp.local. (45)
19:31:32.677337 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 40335 PTR (QM)? _workstation._tcp.local. (41)
19:31:32.677533 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:32.677556 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:32.677575 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:32.677669 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:32.678010 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:32.678057 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:32.678075 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 16991 PTR (QM)? _workstation._tcp.local. (41)
19:31:32.678078 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:32.678181 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:32.678185 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:32.678186 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)
19:31:32.678186 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:32.678207 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:32.678221 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:32.678237 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:32.678268 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:32.678288 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:32.678289 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-1._workstation._tcp.local. (156)
19:31:32.678306 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:32.678368 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:32.678419 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:32.678506 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:32.678548 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:32.678586 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:32.678609 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 40335*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:32.678647 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:32.678648 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)
19:31:32.678649 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:32.678650 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:32.678666 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:32.678676 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:32.678754 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 16991*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:32.715279 IP 192.168.191.14.mdns > 224.0.0.251.mdns: 0*- [0q] 5/0/0 PTR nfssrv [00:50:56:85:79:29]._workstation._tcp.local., (Cache flush) TXT "", (Cache flush) SRV nfssrv.local.:9 0 0, (Cache flush) AAAA fe80::250:56ff:fe85:7929, (Cache flush) A 192.168.191.14 (160)
19:31:32.743099 IP 192.168.191.100.mdns > 224.0.0.251.mdns: 0*- [0q] 5/0/0 PTR lpmgmt [00:50:56:85:ee:6e]._workstation._tcp.local., (Cache flush) TXT "", (Cache flush) SRV lpmgmt.local.:9 0 0, (Cache flush) AAAA fe80::250:56ff:fe85:ee6e, (Cache flush) A 192.168.191.100 (160)
19:31:33.677772 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 63160 PTR (QM)? _etcd-server-ssl._tcp.local. (45)
19:31:33.677866 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 14026 PTR (QM)? _etcd-server-ssl._tcp.local. (45)
19:31:34.064408 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 35759 PTR (QM)? _workstation._tcp.local. (41)
19:31:34.064577 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 63895 PTR (QM)? _workstation._tcp.local. (41)
19:31:34.064646 IP 192.168.191.112.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-0._workstation._tcp.local. (168)
19:31:34.064671 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:34.064735 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:34.064756 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:34.064778 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:34.064779 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:34.064846 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-1._workstation._tcp.local. (156)
19:31:34.064847 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:34.064867 IP 192.168.191.112.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-0._workstation._tcp.local. (168)
19:31:34.064909 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:34.064935 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:34.064943 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:34.064951 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:34.065034 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:34.065036 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-1._workstation._tcp.local. (156)
19:31:34.065090 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:34.065174 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:34.065211 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:34.065219 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:34.065263 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:34.065273 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:34.065298 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:34.065358 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:34.065419 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:34.065443 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:34.065443 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:34.065539 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:34.065557 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)
19:31:34.065574 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:34.065576 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)
19:31:34.065615 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:34.065689 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:34.065764 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:34.065870 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:34.065974 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:34.065974 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:34.066043 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:34.066102 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:34.066126 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:34.066358 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:34.066428 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)
19:31:34.066468 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:34.066489 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:34.066917 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-1._workstation._tcp.local. (156)
19:31:34.066969 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)
19:31:34.067150 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-1._workstation._tcp.local. (156)
19:31:34.067333 IP 192.168.191.112.mdns > 224.0.0.251.mdns: 35759*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-0._workstation._tcp.local. (168)
19:31:34.067832 IP 192.168.191.112.mdns > 224.0.0.251.mdns: 63895*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-0._workstation._tcp.local. (168)
19:31:34.101685 IP 192.168.191.14.mdns > 224.0.0.251.mdns: 0*- [0q] 5/0/0 PTR nfssrv [00:50:56:85:79:29]._workstation._tcp.local., (Cache flush) TXT "", (Cache flush) SRV nfssrv.local.:9 0 0, (Cache flush) AAAA fe80::250:56ff:fe85:7929, (Cache flush) A 192.168.191.14 (160)
19:31:34.129411 IP 192.168.191.100.mdns > 224.0.0.251.mdns: 0*- [0q] 5/0/0 PTR lpmgmt [00:50:56:85:ee:6e]._workstation._tcp.local., (Cache flush) TXT "", (Cache flush) SRV lpmgmt.local.:9 0 0, (Cache flush) AAAA fe80::250:56ff:fe85:ee6e, (Cache flush) A 192.168.191.100 (160)
19:31:34.313391 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 3327 PTR (QM)? _workstation._tcp.local. (41)
19:31:34.313510 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 56585 PTR (QM)? _workstation._tcp.local. (41)
19:31:34.313598 IP 192.168.191.112.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-0._workstation._tcp.local. (168)
19:31:34.313698 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:34.313729 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:34.313832 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:34.313837 IP 192.168.191.112.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-0._workstation._tcp.local. (168)
19:31:34.313847 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:34.313859 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-1._workstation._tcp.local. (156)
19:31:34.313921 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:34.313954 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:34.314063 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:34.314128 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:34.314140 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-1._workstation._tcp.local. (156)
19:31:34.314209 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)
19:31:34.314210 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:34.314211 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:34.314229 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:34.314229 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)
19:31:34.314252 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:34.314267 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:34.314297 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:34.314313 IP 192.168.191.112.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-0._workstation._tcp.local. (168)
19:31:34.314403 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:34.314503 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:34.314519 IP 192.168.191.136.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-d4k62._workstation._tcp.local. (164)
19:31:34.314527 IP 192.168.191.112.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-0._workstation._tcp.local. (168)
19:31:34.314528 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:34.314583 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:34.314602 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-1._workstation._tcp.local. (156)
19:31:34.314605 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:34.314618 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:34.314679 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:34.314721 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:34.314729 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:34.314748 IP 192.168.191.138.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-ldk8m._workstation._tcp.local. (164)
19:31:34.314788 IP 192.168.191.111.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-1._workstation._tcp.local. (168)
19:31:34.314881 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:34.314897 IP 192.168.191.119.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-79rmw._workstation._tcp.local. (176)
19:31:34.314923 IP 192.168.191.108.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-2._workstation._tcp.local. (156)
19:31:34.314977 IP 192.168.191.109.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-1._workstation._tcp.local. (156)
19:31:34.315017 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:34.315068 IP 192.168.191.118.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-89r6r._workstation._tcp.local. (176)
19:31:34.315081 IP 192.168.191.132.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-worker-s45hm._workstation._tcp.local. (176)
19:31:34.315271 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:34.315272 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:34.315415 IP 192.168.191.137.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-worker-l5s4f._workstation._tcp.local. (164)
19:31:34.315468 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 3327*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)
19:31:34.315556 IP 192.168.191.114.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR emretst Workstation-emretst-cz7df-master-2._workstation._tcp.local. (168)
19:31:34.315693 IP 192.168.191.107.mdns > 224.0.0.251.mdns: 56585*- [0q] 1/0/3 PTR tmr Workstation-tmr-wljcl-master-0._workstation._tcp.local. (156)

141 packets captured
289 packets received by filter
104 packets dropped by kernel

Comment 3 Andrew McDermott 2020-11-16 08:15:15 UTC

Tagging with UpcomingSprint while investigation is either ongoing or
pending. Will be considered for earlier release versions when
diagnosed and resolved.

Comment 4 Andrew McDermott 2020-12-04 16:47:06 UTC

Tagging with UpcomingSprint while investigation is either ongoing or
pending. Will be considered for earlier release versions when
diagnosed and resolved.

Comment 5 Ryan Fredette 2021-02-01 22:04:36 UTC

Even though we use 5353 for dns in the cluster, this does look like actual mdns. Moving this to Networking -> mDNS

Comment 6 Ben Nemec 2021-02-02 17:32:50 UTC

This was addressed in another bug. Marking this one as duplicate.

*** This bug has been marked as a duplicate of bug 1898097 ***