Hi,    Thank you. One more query. If  I have only one switch 3750   and  one 10 g up link and one 1gb  backup link  to the core, can  I use the  free 10G   to  create a trunk  to add another  switch like 3850/ 9300? will it work ?    Regards   ... View more

Hi,  Thank you for the  quick reply. I have a 10 g link  on one switch and 1g  back up link  on one switch. So One switch is  free .  I can use the  10 g port on that switch  to trunk  it with cat3850 . Only thing is that  whether the   same type of sfps can be used  in 3850/ 9300 and 3750  is the concern .    Regards   ... View more

Hi,  Thank you for the reply. All of the  switches have  10 g capability  and  one 10g  sfp port is used to trunk it to the  core .  Since the switches are stacked and  using a single ip , can I trunk   the sfps from any switch  to the new 3850 or 9300.? FYI  ,  on one floor   suddenly  more users were added .  this floor has  two cat3750 48port switches and one cat3750  24 port switch. This stack is  using a trunk to the core using   a 10 g sfp . Now  I want to add one more switch  either 3850 or 9300  . If I trunk it with  a normal 1 g port  I am losing  a lot. Since I cant stack  with 3850 or 9300 ,  have to use  the TE2   port to trunk. Two TE2  ports   are free . Can I use any one of them to trunk ? Regards ... View more

Hi Reza, Thanks a lot. Regards prakavi ... View more

Hi Reza, so we can trunk a catalyst 3560g switch to a3750 stack either two copper ports on the switch or tusing one fo the fiber ports.We have some catalyst 3560 g switches  in some floors .I was just thinking whether t his can be utilized since these switches are 10/100/1000  and poe .only difference is the problem in up link. Do you think is it better to replace 3560 g switches also with 3750x ? Regards prakavi ... View more

Dear Reza, Once  agaian I dont have words to express my thanks. The following points are very important to me. 1- FEX   doesent support   POE (so number of edge switches cannot be reduced)  and the distance limit is 300(asper jerry) which is a limitation. 2-Having an infrastructure with cat6500 setup it is better to add 10 gb modules  in the core for the servers and  to implement  VSS  for avoiding spanning tree issues. 3- Ultimately you need endless budgets  ! (very well said) 4- So it is better to stick on to current desgn  and look in to the VSS  concept. Let me thank all the people who helped and supported. Every one helped with their own contributions. Thnaks a lot again. Best regards prakavi ... View more

Hi, thanks jerry for the explanations! ... View more

Dear Reza, As always you scores! well explained.But I have some more doubts to clear.From your explanations what I understand is  that Nexus is mainly a datacenter switch.Still it can be used as a Core .But  the flexibility of adding linecards is limited. I have some more queries. 1-Can a FEX  replace a stack of switches?If i have a stack  of 5 switches over 15 floors  can i replace the stack in each floor with a FEX?(irtulized environment) 2- Since we have cat 3750x  swiitces on edge and cat6506 with 10g at the core the aggreagation is not bad.But if i can replace the 3750s with FEX really its helpful. 3-Another question is that   can i have a FEX  each rack where  cat3750s are deployed? 4-All the servers may not support 10G .So will it be an issue? 5- Another option for me is that  replacing the 1gb in the core where servers are connected  with a 10 gb module. it will be less costlier than a NEXUS my main query was whether we can  reduce the number of edge switches ? I dont think its not possible. Any way I am looking for your valuable suggestions. Regards prakavi ... View more

Hi, Can you elaborate a bit how can I reduce the number of edge switches by using FEX(FABRIC EXTENDER)? Regards ... View more

Hi, Great idea, But can I reduce the number of edge switches using VPCS? ... View more

Hi, My question is that  can I reduce the number of edge switches ? Regards ... View more