I'm involved in, IPExpert Vol1 Workbook as many others students i use gns3 and the topology file give to us by IPExpert on their website.
The topology use router with two NM-16ESW card for emulate a switch (gns3 can't emulatea real switch) after redesigning their topology for my gns3 environment, I began to see two pbs:
1- speed and duplex mismatch
(correction when you use the default ethernet interface of 3725 you have to fix the speed and duplex on both side of the link)
2- can't ping even the vlan ip addres of a switch instead of having a router port in that vlan, cant't ping ip address on a different switch in my topology, meanwhile everything in my config was good
(correction2 NM-16ESW card on a router can't communicate I don't know why, even if some times the forum on the web say the opposite, if your traffic needs to go from one card to an other one it's will be impossible, try to use only one NM-16ESW card)
After all these changes everything seems working properly.
The topology use router with two NM-16ESW card for emulate a switch (gns3 can't emulatea real switch) after redesigning their topology for my gns3 environment, I began to see two pbs:
1- speed and duplex mismatch
(correction when you use the default ethernet interface of 3725 you have to fix the speed and duplex on both side of the link)
2- can't ping even the vlan ip addres of a switch instead of having a router port in that vlan, cant't ping ip address on a different switch in my topology, meanwhile everything in my config was good
(correction2 NM-16ESW card on a router can't communicate I don't know why, even if some times the forum on the web say the opposite, if your traffic needs to go from one card to an other one it's will be impossible, try to use only one NM-16ESW card)
After all these changes everything seems working properly.
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