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To enable sticky learning, enter the switchport port-security mac-address sticky interface configuration command. You can configure an interface to convert the dynamic MAC addresses to sticky secure MAC addresses and to add them to the running configuration by enabling sticky learning.
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Although sticky secure addresses can be manually configured, we do not recommend it. If these addresses are saved in the configuration file, the interface does not need to dynamically relearn them when the switch restarts. Sticky secure MAC addresses - These can be dynamically learned or manually configured, stored in the address table, and added to the running configuration.
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When sticky learning is enabled, the interface adds all secure MAC addresses that are dynamically learned to the running configuration and converts these addresses to sticky secure MAC addresses. If possible reproduce this behavior in a lab environment and if you're running the latest software 12.2(25)SEE report this to TAC. We then removed the port-security commands from port FA0/37 on switch1 and then the traffic dropped to normal level again.Ĭan someone explain this behaviour to me?Īssuming that the port on switch 1 was notconnected at the time, the switch accepts frames for destination address 000b.cdf1.24c5 - because it is stored in configuration but cannot forward it to the destination port and floods traffic througout all ports on the switch. The strange thing is we saw traffic increasing all several ports all with destination or source to the moved server. Now we have moved this server to the other switch2 and configured the new port in the same way: Switchport port-security mac-address sticky 000b.cdf1.24c5 Switchport port-security mac-address sticky On switch1 we used the following setting for a specific server: We have 2 Catalysts 3550 interconnected via Gigabit ports on different locations.
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