Posts with some Wireshark screenshots and explanations are tagged with Wireshark.) And if you are interested in some more pcap files on my site follow the pcap tag. Of course I preferred IPv6 rather than legacy IP for all “above layer 2” protocols.
In the following I am only listing the protocols by name and their basic configuration. Spanning-tree mode rapid-pvst, appears per default every 2 seconds on all switch ports per VLAN! I additionally use If you are not familiar with any of these protocols, please wikipedia it yourself. Spanning-tree loopguard default spanning-tree portfast default , and Spanning-tree portfast bpduguard default .
I mean, what is the ID when it is correctly split into the port prio and the port number? That is, how is the ID displayed on a Cisco device when the “show spanning-tree” command is issued? (Hint: This is the 1998 version of 802.1D, not the 2004.) CHALLENGE: What is the root bridge identifier for VLAN 121? 2nd CHALLENGE: At what time (relative to the beginning of the trace) did the first topology change occur? 3rd CHALLENGE (a bit tricky): What is the port identifier in VLAN 30 from bridge “00:21:1b:ae:31:80”. How to read ssh versoin from wireshark pcap download#.
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