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There is an odd problem on the core switch right now, its a C9500-48Y4C running IOS XE 17.09.03
Core-Switch#show logging | inc flapping%SW_MATM-4-MACFLAP_NOTIF: Host 0026.fc2a.0000 in vlan 1259 is flapping between port Po49 and port Po51%SW_MATM-4...
Hello everyone,
I would like to learn if it is possible to mirror traffic from multiple vlans to an analyzer device that is connected to a remote switch. I made a sketch and changed some IPs and vlans for simplicity.
All traffic that arrives on eithe...
Hello,
a Cisco PI (3.7) VM does not succeed in starting the NCS anymore, although it was previously shut down gracefully. The problem is that I would've liked to verify that all licenses that were on this PI are also present in a new Prime (3.10) VM....
I am aware that DHCP Snooping will usually drop the packet and generate a log when something like a DHCP Offer is being transferred through an untrusted interface. Through scripting, this log can be detected by the switch and forwarded to an admins e...
A scream test is probably not what we need because no one is influenced by this other than the administrator who sees the logs filled with mac-flapping. I disabled the drop commands for a moment though and the logs started being flooded again immedia...
1 and 3 are not possible because its customer equipment in this case and the MAC address is kind of null routed as a workaround at this time:
mac address-table static 0026.fc1f.0000 vlan 1 dropmac address-table static 0026.fc1f.0000 vlan 3 dropmac ad...
Distro 1 and 2 are both NXOS 9.3(5) - C93360YC-FX2. The MAC was not seen on either switch again.
Dist-1# show mac address-table | inc 0026.fcDist-1# show mac address-table | inc 0026.fcDist-1# show mac address-table | inc 0026.fcDist-1# show mac addr...
Thanks for the advice Leo, I tried some show and global-config commands related to the feature but it doesnt seem like the switches use it, neither do they seem able to at this time, maybe due to the licenses in use.
Failed/unrecognized commands:
sho...
