Complete full bandwidth connection in Stack and add a new stack member

[filiberto.aguirre]

Hi,

I was requested to add a new switch on stack, after reviewing the config I noticed that the current stack does not have redundancy.

I'd like to add the new switch to the stack but with full bandwidth and redundancy.

I've read cisco's documentation about stack about how to have redundancy, full bandwidth and how to add a new member but I'm not sure if I

should first set the redundandy and full bandwidth first with the current switches working and then add the new switch, or it would be better to power off

all the switches and then connect all the stacking cable (including the new switch) to support redundancy and full bandwidth after this power on all the

switches. I don't want to affect too much time to end users.

I hope any of you can give any recommendation

regards

SW_MXMDF#sh switch
Switch/Stack Mac Address : 0019.55be.0380
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
*1       Master 0019.55be.0380     10     0       Ready
2       Member 001a.a29e.e900     1      0       Ready
3       Member 001a.a29c.ed80     1      0       Ready
4       Member 0015.6231.4700     1      0       Ready

SW_MXMDF#sh switch stack-ports
  Switch #    Port 1       Port 2
  --------    ------       ------
    1           Ok          Down
    2           Ok           Ok
    3           Ok           Ok
    4          Down          Ok

SW_MXMDF#SH SWitch NEighbors
  Switch #    Port 1       Port 2
  --------    ------       ------
      1         2            None
      2         3             1
      3         4             2
      4        None           3

SW_MXMDF#SHow PLAtform STAck-Manager All
Switch/Stack Mac Address : 0019.55be.0380
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
*1       Master 0019.55be.0380     10     0       Ready
2       Member 001a.a29e.e900     1      0       Ready
3       Member 001a.a29c.ed80     1      0       Ready
4       Member 0015.6231.4700     1      0       Ready

         Stack Port Status             Neighbors
Switch#  Port 1     Port 2           Port 1   Port 2
--------------------------------------------------------
  1        Ok        Down               2      None
  2        Ok         Ok                3        1
  3        Ok         Ok                4        2
  4       Down        Ok              None       3

               Stack Discovery Protocol View
==============================================================

Switch   Active   Role    Current   Sequence   Dirty
Number                    State     Number     Bit
--------------------------------------------------------------------
1        TRUE    Master   Ready       128       FALSE
2        TRUE    Member   Ready       139       FALSE
3        TRUE    Member   Ready       145       FALSE
4        TRUE    Member   Ready       142       FALSE

                 Stack State Machine View
==============================================================

Switch   Master/   Mac Address          Version    Current
Number   Member                          (maj.min)  State
-----------------------------------------------------------
1        Master    0019.55be.0380          1.34        Ready
2        Member    001a.a29e.e900          1.34        Ready
3        Member    001a.a29c.ed80          1.34        Ready
4        Member    0015.6231.4700          1.34        Ready

SW_MXMDF#sh switch stack-ring speed

Stack Ring Speed        : 16G
Stack Ring Configuration: Half
Stack Ring Protocol     : StackWise
SW_MXMDF#

[dominic.caron]

Hi,

You need to open the stack ring anyway to add a new switch to the stack. Simply rack the new switch, connect the ring, (SW4-St1 to SW5-St2 and SW1-St2 to SW5-St1) and then put power to switch 5. (Never add a switch already powered-on to a live stack)

[filiberto.aguirre]

Hi dominic,

Thanks a lot for your clear explanation.

regards,

[filiberto.aguirre]

hi dominic,

I'm about to add the new switch to the stack but  a new doubt has come up to me. The new switch is a WS-C3750G-24PS-S, with c3750-ipbase-mz.122-50.SE.

The current switches in stack have c3750-advipservicesk9-mz.122-35.SE1, so I was thinking to upgrade to the same feature and version the current switches have to  the new switch but the  version in not available any more.

the version available for the new switch is c3750-advipservicesk9-tar.122-44.SE6.

the switches currently working are diferents models

WS-C3750G-24TS-E

WS-C3750-48PS-S

WS-C3750-48PS-S

WS-C3750G-24T-S

so my doubt is , shold I upgrade firstly the current switches one by one and then add the new switch??

I notice all the files tar and bin have the same size for the diferentes models, for the stack should be enough just upgrade the master?

regards

[smogra]

Hi,

All the switches in the stack should have same IOS version. It is not enough to just upgrade the master. You need to upgrade all the other member switches as well for them to be a part of the same stack.

So, upgrade all the switches to have the same version. Do it any ways you want. First upgarde the new one and then upgrade the old ones or vice versa. But when you join them, to come up as a part of the stack they should have same IOS.

Hope that answers your question, Fil.

Regards,

Sweta

P.S. Please rate the answer if it helped you.