packet tracer 1941 router vs. csr1000v

[ggnfs000]

I started using packet tracer and it is sweet! Thanks for those who recommended!
Well, it is pretty intuitive and learned a lot over last few days and got into first hurdle:
Created and booted 1941 Router which by default has 2 GigabitEthernet interface for routing and one add'l interface called Vlan1 (this I suspected as management). Now I can create two switches and connect auto to 1941 which each of them will connect to two GigabitEthernet interface. If I attempt to connect one add'l link to another switch (thinking it will connect to vlan1 interface) packet tracer will not allow to connect add'l ethernet links between vlan1 and switch. Assuming vlan1 is management, how do I connect this to normal switch? The reason is that I set ip address of vlan1 interface to dhcp and wanted to have ip assigned dynamically by creating another server on the switch to which vlan1 is connected but that is not allowed.

I can connect console wire but that would be for console port.

By comparison, I have deployed csr1000v in the past with hyper-v and create several interfaces at will and could freely choose any of the interface created for management.

Therefore, till I figure out this, it appears I can only access my switch through its own terminal or from another desktop through console port but not over ethernet connection with telnet or ssh protocol.

Thanks.,

[ggnfs000]

i guess the same question applies to switches like 2960 which has about 20 something parts and one of them is vlan 1. Not sure how to connect this to another switch so that it can get its own dhcp ip.

[SimonV]

If the interface is Vlan1 it means that the router has an onboard switch and you need to configure one of the ports to be a member of that VLAN.

interface Gig0/x
switchport
switchport mode access
switchport access vlan 1

+ the usual housekeeping commands (portfast, etc). As soon as one of the interfaces is in the VLAN and in the UP/UP state, the VLAN interface will go up and start the DHCP requests.

This also means that the router will send out BPDUs so take that into consideration if you're connecting to a switch. Don't cut yourself off with BPDUguard 

[deanwebb]

Also, don't use VLAN 1 in production. Ever.

[ggnfs000]

thank you!

[icecream-guy]

keep in mind that packet tracer is a simulator, not like real hardware. under certain circumstances it does not act like a real router or switch. But it should provide enough hands on the get you through the exam.

[ggnfs000]

yes, i already wanted to run some iperf udp stress but not sure if this is possible with Desktop or laptop object placed on worksplace and when ports are forced to different speed setting i.e. 10/100 or 1Gbits. I am assuming probably not. iperf has got to run from linux.
I am contemplating the way to do it.
Within two Cisco UCS blade each equpped 10G port, iperf was fairly accurate 30 seconds udp traffic clocked about 9.99Gbits/sec when I ran some traffic.