cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1210
Views
0
Helpful
7
Replies

Spanning tree mode on C3750 compatible with SG300?

elias.pereira
Level 1
Level 1

Hello everyone,

In our computer park we have two C3750 in stack. The rest of the switches are Cisco SG300-28P.

Which way should I set for it to be compatible in both models and the C3750 model be the root?

1 Accepted Solution

Accepted Solutions

Try to configure instance 1

on 3750
spanning-tree mst configuration
name mymst
revision 1
instance 1 vlan 1-4096  [ use question mark if hyphen is not accepted]
spanning-tree mst 1 priority 4096

on sg300

spanning-tree mst configuration
name mymst
revision 1
instance 1 vlan 1-4096
spanning-tree mst 1 priority 61440

Masoud

View solution in original post

7 Replies 7

Hello,

edited

SG300-28P supports RSTP and MSTP. The default is RSTP. Check the link below.

http://www.cisco.com/c/en/us/products/collateral/switches/small-business-smart-switches/data_sheet_c78-610061.pdf

http://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbms/sf30x_sg30x/administration_guide/CLI_Nikola300_1_3_7.pdf

3750 supports PVST MST Rapid PVST. The default is Rapid PVST.

****************************************

on 3750

spanning-tree mode mst

Spanning-tree mst 0 priority 4096

*******************************************

On others

spanning-tree mode mst

Spanning-tree mst 0 priority 61440

*************************************************************

 

Hope it helps,

Masoud

 

Hello Masoud,

Why you edited the post?

Hello,

I checked 3750 and noticed RSTP is not in the command sets so I edited my post. What you see you now will work on both 3750 on SG300.

Hope it helps,

Masoud

Masoud,

In sg300 no have instance 0 on the command: Spanning-tree mst 0 priority 61440

#spanning-tree mst
configuration Configure MSTP parameters
<1-7> Specify instance ID
max-hops Configure the maximum hops allowed in a region for a
Spanning Tree.

edited:

I try to set on 3750: "spanning-tree mst 1 priority 4096", but the priority always stay 32768 and when I set "spanning-tree mst 0 priority 4096" the priority stays 4096

Try to configure instance 1

on 3750
spanning-tree mst configuration
name mymst
revision 1
instance 1 vlan 1-4096  [ use question mark if hyphen is not accepted]
spanning-tree mst 1 priority 4096

on sg300

spanning-tree mst configuration
name mymst
revision 1
instance 1 vlan 1-4096
spanning-tree mst 1 priority 61440

Masoud

Hello Masoud,

I set up that way and works very fine!!

Thanks for your help! Really thanks!

Hello,

You are most welcome. Happy to help.

Masoud

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: