Catalyst (3750 24 10/100/1000T) and (3750 12 SFP) Stacking Problems

[amrahmed85]

Dear all

I'm having a very strange situation here (at least for me)

we have 4 core switches

2 x   WS-C3750G-24T-S Catalyst 3750 24 10/100/1000T + IPB Image

and

2 x   WS-C3750G-12S-S Catalyst 3750 12 SFP + IPB Image

Stack configuration is done this way

when the switches are powered on, the first two SFP core switches are seen as a single stack with the stack master LED turned green on the first switch

the other two (24 10/100/1000T) switches have the RPS LEDs always green, mode cannot be changed, and cannot be accessed by Console connection

but when the (24 10/100/1000T) are powered off, the first (SFP) switch in the stack reports that " Switch 3 and 4 has been removed from Stack "

which means they are stacked but there's something wrong, because

only the SFP ports are shown in the " Show interfaces status " , the ethernet ports of the bottom switches are not present !!!

can you please tell me what's the poblem ?

[dkhouri]

Hi Amr,

If you do a show switch detail do you see ALL four switches listed....and are their state's set to Ready? Here's an example of what it should look like;

router#show switch detail
Switch/Stack Mac Address : 2893.fedd.2780
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
*1       Master 2893.fedd.2780       10     0          Ready              
2       Member 0023.ea4b.c380     1      0          Ready              
3       Member 0023.ea4b.c500     1      0          Ready            

         Stack Port Status           Neighbors    
Switch#  Port 1    Port 2         Port 1   Port 2
--------------------------------------------------------
     1        Ok         Ok                2        3
     2        Ok         Ok                3        1
     3        Ok         Ok                1        2

If you do see all 4 switches listed in Ready state, then it's most probably a configuration issue. If you cannot see the interfaces on the third and forth switch when you do a show int status form the master switch, you might need to renumber the third and forth switch [ router(config)#switch 1 renumber 3 ]. However, you might have to console onto the third and forth switch to do it. Once you renumber it, you'll need to un-provision the old switch number that was assigned to it [ router(config)#no switch 1 provision ].

To make sure you've renumber it correctly, if you stay consoled onto the third switch and do a show int status, your interfaces should now be seen as 3/0/1

3/0/2

3/0/3 etc etc.

The same applies to the forth switch.

DK

[amrahmed85]

Dear Daniel

Sorry for my delayed response but i was actually quite busy

but the problem was actually in another sense

the default profile for the Catalyst 3750 SFP is the Aggregate SDM Template

while the 3750 10/100/1000 ethernet Switch Default SDM profile was Desktop profile

so i had an SDM mismatch

DATACENTER#sh switch detail
Switch/Stack Mac Address : 081f.f3cf.1c80
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
*1       Master 081f.f3cf.1c80     1      0       Ready              
2       Member 081f.f3cf.5900     1      0       Ready              
3       Member aca0.16ac.0180     1      2       SDM Mismatch       
4       Member aca0.16a3.bc80     1      2       SDM Mismatch 

         Stack Port Status             Neighbors    
Switch#  Port 1     Port 2           Port 1   Port 2
--------------------------------------------------------
  1        Ok         Ok                2        4
  2        Ok         Ok                3        1
  3        Ok         Ok                4        2
  4        Ok         Ok                1        3 

________________________________________________________________

all i did was changing the default profile of the SFP switches into the Desktop Profile and problem was solved

switch 1 provision ws-c3750g-12s
switch 2 provision ws-c3750g-12s
switch 3 provision ws-c3750g-24t
switch 4 provision ws-c3750g-24t
system mtu routing 1500
ip subnet-zero
!
!

no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface GigabitEthernet1/0/1
!
interface GigabitEthernet1/0/2
!
interface GigabitEthernet1/0/3
!
interface GigabitEthernet1/0/4
!
interface GigabitEthernet1/0/5
!
interface GigabitEthernet1/0/6
!
interface GigabitEthernet1/0/7
!
interface GigabitEthernet1/0/8
!
interface GigabitEthernet1/0/9
!
interface GigabitEthernet1/0/10
!
interface GigabitEthernet1/0/11
!
interface GigabitEthernet1/0/12
!
interface GigabitEthernet2/0/1
!
interface GigabitEthernet2/0/2
!
interface GigabitEthernet2/0/3
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet2/0/4
!
interface GigabitEthernet2/0/5
!
interface GigabitEthernet2/0/6
!
interface GigabitEthernet2/0/7
!
interface GigabitEthernet2/0/8
!
interface GigabitEthernet2/0/9
!
interface GigabitEthernet2/0/10
!
interface GigabitEthernet2/0/11
!
interface GigabitEthernet2/0/12
!
interface GigabitEthernet3/0/1
!
interface GigabitEthernet3/0/2
!
interface GigabitEthernet3/0/3
!
interface GigabitEthernet3/0/4
!
interface GigabitEthernet3/0/5
!
interface GigabitEthernet3/0/6
!
interface GigabitEthernet3/0/7
!
interface GigabitEthernet3/0/8
!
interface GigabitEthernet3/0/9
!
interface GigabitEthernet3/0/10
!
interface GigabitEthernet3/0/11
!
interface GigabitEthernet3/0/12
!
interface GigabitEthernet3/0/13
!
interface GigabitEthernet3/0/14
!
interface GigabitEthernet3/0/15
!
interface GigabitEthernet3/0/16
!
interface GigabitEthernet3/0/17
!
interface GigabitEthernet3/0/18
!
interface GigabitEthernet3/0/19
!
interface GigabitEthernet3/0/20
!
interface GigabitEthernet3/0/21
!
interface GigabitEthernet3/0/22
!
interface GigabitEthernet3/0/23
!
interface GigabitEthernet3/0/24
!
interface GigabitEthernet4/0/1
!
interface GigabitEthernet4/0/2
!
interface GigabitEthernet4/0/3
!
interface GigabitEthernet4/0/4
!
interface GigabitEthernet4/0/5
!
interface GigabitEthernet4/0/6
!
interface GigabitEthernet4/0/7
!
interface GigabitEthernet4/0/8
!
interface GigabitEthernet4/0/9
!
interface GigabitEthernet4/0/10
!
interface GigabitEthernet4/0/11
!
interface GigabitEthernet4/0/12
!
interface GigabitEthernet4/0/13
!
interface GigabitEthernet4/0/14
!
interface GigabitEthernet4/0/15
!
interface GigabitEthernet4/0/16
!
interface GigabitEthernet4/0/17
!

interface GigabitEthernet4/0/18
!
interface GigabitEthernet4/0/19
!
interface GigabitEthernet4/0/20
!
interface GigabitEthernet4/0/21
!
interface GigabitEthernet4/0/22
!
interface GigabitEthernet4/0/23
!
interface GigabitEthernet4/0/24

that's it !

: D

cheers