Serial Connection Modules Questions 5

[GottaBeKiN]

I am planning to buy 4-5 2950s and I am trying to gather information on what modules I should get for them. I am looking at the Cisco Prep center website and the sample lab configuration there. Most of them need a serial connection between them. Some of them use the A/S flavor (ex. WIC-2A/S or NM-4A/S), some of them use the T flabor (ex. WIC-2T or NM-4T). I did some reading but can't really tell which ones I should get. Can the A/S modules be connected to a T module? What about the WIC-1DSU-1T, is that something to be considered for?

I would also like to know if a 2950 switch with Standard Image be upgraded to an Enhanced Image just like how one would re-flash the IOS?

Thank you.

 

[maczen]

Thanks Burt.. Is that such a big deal in a lab environment? Seems pretty simple to change the mac address..

http://articles.techrepublic.com.com/5100-10878_11-6125413.html

Mainly what concerns me there is the BIA (Burned in Addy).. Will that create any problems?

Trying to determine the negative side of the duplicate macs in a lab if any other than the minor annoyance of changing it the doing a copy run start...

 

[burtsbees]

You can have point to point links, and interface and line protocol would be up, yet they won't ping in both directions---one may ping the other, but not the other way around. Makes for a real troubleshooting nightmare! You'd think if something can ping, then 2 way traffic and 2 way routing is there, because of return traffic.

Burt