I have a pair of 1900EN switchs. I am trying to learn about VLANs and how they work....
I have connected the swiches via a crossover cable on port 26 or B on both switches.
I have also setup SPAN on one switch (port 25) and monitoring port 26 trunk port. I created 2 vlans, 1 and 2. I put a one pc in VLAN 2 on switch1 and put another pc in VLAN 2 on switch2.
I have setup a ping -t goign between the PC's
I can see that the Trunking is working because I am getting a repsonce and if I disbale the trunking the pings fail. So thats good!
My problem is that I am trying to sniff the trunking ports and look at the packets and look to find the ISL header information. I am getting alot of STP traffic and the ICMP traffic...but I can't see anything to do with ISL?
Is this normal? What am I doing wrong?
I know this is abit more than CCNA stuff...but I am just a geek I guess =)