11-29-2016 04:18 AM - edited 03-08-2019 08:21 AM
Hi There,
Can somebody help me here to resolve the issue - half stack/speed. Is there compatibility issue or how can i resolve it.
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
1 54 WS-C3750E-48PD 12.2(50)SE2 C3750E-UNIVERSALK9-M
2 54 WS-C3750E-48PD 12.2(50)SE2 C3750E-UNIVERSALK9-M
* 3 54 WS-C3750E-48PD 12.2(50)SE2 C3750E-UNIVERSALK9-M
4 12 WS-C3750G-12S 12.2(50)SE2 C3750-IPBASEK9-M
Stack Ring Speed : 16G
Stack Ring Configuration: Half
Stack Ring Protocol : StackWise
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
Regards
11-29-2016 06:08 AM
Hi
can anybody look into it plz
11-29-2016 06:13 AM
Have you connected the cables correctly as that can cause half speed ?
All ios are same so should not be a compatibility issues once major minor numbers match , did you run same license each switch too although that shouldn't effect stack speed
Make sure there all tight
When you connect a switch to a stack, make sure you properly connect both StackWise cables. It is possible for a switch to join a stack when only one StackWise cable is connected to another active stack member, in which case the stack operates at less than maximum ring bandwidth.
An open ring operates at half the available bandwidth. After you connect both StackWise cables of the new switch and it has joined the ring, full ring bandwidth is restored.
11-29-2016 06:25 AM
As Mark has already noted, the likely problem is you don' have the ring properly connected. Your units 1 and 4 don't show a second ring port connection.
11-29-2016 06:33 AM
Thanks Mark,
can you see here C3750G is having IPBASE only and i think it doesnt take Universal image whether it should work? Any recommendation. Although i have a spare WS-C3750X-12S, can i use it in place of C3750G with other WS-C3750E-48PD in stack ? Regards..
3 54 WS-C3750E-48PD 12.2(50)SE2 C3750E-UNIVERSALK9-M
4 12 WS-C3750G-12S 12.2(50)SE2 C3750-IPBASEK9-M
11-29-2016 06:36 AM
as the master is no3 it should work off that in terms of license from what I remember , the compatibility more comes from the major minor numbers in the ios version 12.2(50) , a license issue should not reduce stack speed to half as its a physical thing , is your ring complete like the screenshot , see the way switch 1 is looped back to 4 to form a full ring topology
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