Dos warning message in 6900

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HUSSAINQCS
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Posts: 291
Joined: 21 Jan 2017 02:57

Dos warning message in 6900

Post by HUSSAINQCS » 24 Aug 2017 13:14

I have warning message in 6900

2017 Aug 20 06:26:04 (none) swlogd: ipni dos warning(4) VRF 0: DoS type unicast dest-ip/multicast-mac from 192.168.20.5/5c:f3:fc:e8:0d:d8 on port 1/1/16.

What is the root cause will it create any impact on network


Please i need somebody advice

silvio
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Location: Germany

Re: Dos warning message in 6900

Post by silvio » 24 Aug 2017 17:09

all is written in the message - which client (mac, ip, port) is the root of this message. Normaly there is no impact. mostly this is a normal client or server. You can check with wireshark (if the messages are there often) which mc traffic is the reason.
regards
Silvio

isaacm
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Posts: 1
Joined: 04 Jan 2019 12:23

Re: Dos warning message in 6900

Post by isaacm » 04 Jan 2019 12:28

I have the same warning, but is constant with many client.
ipni dos warning(4) VRF 0: DoS type multicast-mismatch from 10.50.55.101/20:a6:cd:c7:24:02 on port 1/1/49
ipni dos warning(4) to 224.0.0.251/00:01:60:5e:00:fb.
this traffic is from access point

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