Don't get Console port confused with an interface port. Yes, a Console port uses the RJ-45 jack and plug, but the wires are rollover from the DB9 pin connector or USB. Your normal UTP or STP are not rollover. Also, just for fun, the AUX port is used for a modem connections, so you can dial into an offline router to config by dial up.

Some laptops or PCs don't have this DB9 male serial port to complete the connection, however, we could use a DB9 male to USB serial adapter to complete the physical connection by console. Today we have RJ-45 to USB console cables that are available in the market. Conclusion

With todays computers, DB9 is old technology and you wont find(or extremely rare) this port on any new computers. What you will be required to do is get a DB9 to USB adapter, which then allows you to connect via USB. So in brief, to connect to the console management port at the back, you will need a Console Roll-over cable and a DB9 to USB adapter.

First, connect the PC to the Switch using a console cable. The PC port will be the RS-232 and the switch port will be the Console port. Next, click on the PC and access the Desktop tab. Click on the Terminal icon. A small window will appear, click OK to accept the default settings and the switch CLI will appear.

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2025年3月19日 · The port flapping issue is likely caused by excessive CRC errors and input errors on Device2's Ethernet1/29, indicating a physical layer problem. With over CRC and input errors logged, the issue could stem from a faulty or damaged cable, a bad connector, or a mismatched configuration. .

2025年3月6日 · "Unable to negotiate with 192.168.0.32 port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1". There was some logs on the IOSv router aswell, but I will have to provide that later as I am upgrading to CML 2.8 as of writing this.

At the time of change port state, TCN BPDU is generated and sent across the ports. This causes the adjacent nodes to recalculate STP. Ofcourse, it is an overhead in case of flaps. Yes more than one port can be in BLK status. and the one with best match to STP will come up. HTH.

3.can the native vlan be configured on access port? Native vlan command would be configured on trunking port, but let's say you have a native vlan 30 on the trunk connection, you do still be able to configure ports in access mode belong to vlan 30 connected to pcs for example, in other words, yes you can. santosh ha scritto:

Edge port = port configured with the portfast feature, and the portfast feature is intended for access ports where there won't be any switch connected, but just in case it is allowed for the port to go back to operate as a normal spanning tree port if it receives a BPDU, this is to avoid loops.