11-30-2015 01:33 PM - edited 03-08-2019 02:54 AM
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?
Solved! Go to Solution.
12-01-2015 05:11 AM
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
11-30-2015 03:42 PM
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
12-01-2015 04:39 AM
Hello Masoud,
Why you edited the post?
12-01-2015 04:43 AM
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
12-01-2015 05:11 AM
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
12-01-2015 05:11 AM
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
12-03-2015 07:37 AM
Hello Masoud,
I set up that way and works very fine!!
Thanks for your help! Really thanks!
12-03-2015 07:40 AM
Hello,
You are most welcome. Happy to help.
Masoud
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide