Invalid source mac address cisco

Cisco Infrastructure :: 5513 - Invalid Traffic From Multicast Source Address

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  • The Switched Environment (1.2).
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  • MAC Address Flooding – MAC address table overflow attacks;
  • CISCO-PORT-SECURITY-MIB?

Top Expert This award recognizes someone who has achieved high tech and professional accomplishments as an expert in a specific topic. Commented: What's the MAC Address?

1. Layer2 Technologies

Author Commented: The MAC addrress is I am still waiting for a solution or reason to this error message. Find out now! The packet is treated as invalid and no learning is done. Excessive flow of such packets can waste CPU cycles. This message is rate-limited and is displayed only for the first such packet received on any interface or VLAN.

Subsequent messages will display cumulative count of all such packets received in given interval on all interfaces. Recommended Action: Check the switch configuration file to find the source of these packets on the specified port and take corrective action to fix them at the source end.


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You can also enable port security on that interface to shutdown the port if the incoming rate of packets with invalid source mac address is too high by issuing the switchport port-security limit rate invalid-source-mac command. I'll keep you posted. I am seeing this packet on a Cat The source and destination MACs are different.

Source - D Destination - 3d:3d:4bd We have the same on two switches. We have traced it back to a Tandberg. I am continually looking to identify the mechanics, but I have been told that it is innocuous.

Suspicious packets with all-zero Ethernet header - Wireshark Q&A

Not sure I am buying that just yet because I don't know exactly why it is occurring and it does not appear to happen with any of our other Tandbergs. Use our contact form or report bugs here For interactive help and to chat with other users, try our Slack group. Follow the Internet Storm Center on Twitter.

Find the IP Address of a Device connected to a Cisco Switch

Sep 28th 9 years ago. Invalid mac addres and its coming from different ports and yes it can't be traced. The default form of error message is:. The packet is treated as invalid and no learning is done. Excessive flow of such packets can waste CPU cycles. This message is rate-limited and is displayed only for the first such packet received on any interface or VLAN.

Configurations

Subsequent messages display the cumulative count of all such packets received in given interval on all interfaces. Check the switch configuration file in order to find the source of these packets on the specified port and take corrective action in order to fix them at the source end.

gelatocottage.sg/includes/map21.php For example, it can be due to a faulty NIC or connected hub. You can also setup a SPAN session to identify the source. On 4k, we can disable logging regarding this event It actually tell switch to drop frame on ASIC level instead of CPU with following command " mac address-table static 0.

In that case, drop will be done on Hardware rather that software currently dropping done in Software which is also increasing CPU Utilization. Find A Community.