Edge switch inquiry

[moamen1230]

Hello Guys,

I have an issue and i need your help if possible.

I have 6 cisco Switches 2960 48 port and one 3750 core switch, one of the edge switches damaged i think the motherboard is corrupted.
Somehow i need to replace it with SG220-50-K9-EU  .. Is that possible ? 

Thanks in advance

[Mark Elsen]

 - Depends on the needed capacities , check Table 1 from the document below :

           https://www.cisco.com/c/en/us/products/collateral/switches/small-business-220-series-smart-plus-switches/datasheet-c78-731284.html

 M.

[moamen1230]

I have already trying to connect the SG220-50-K9-EU to the core switch with the same needed setting different way as no vtp mode on this model.
but didn't work ... VLANs can't reach each other 

core and new switch configuration attached.

Note: The two switches is connecting on port 48 on both, I disabled the ether channel till i solve this issue 

Thank you

[paul driver]

Hello
In don’t see any ether channel between those two switches?- try the following 

core
configure the switchport connecting to the new switch as a trunk

int x/48

switchport mode trunk

new switch

Change spanning-mode to pvst 

spanning-tree mode pvst

[moamen1230]

i did the following:

On Core switch 

interface GigabitEthernet7/0/48
switchport trunk encapsulation dot1q
switchport mode trunk 

New Switch: 
No pvst mode 

Third-F-Edge(config)#spanning-tree mode
mstp Configure IEEE 802.1S Multiple Spanning Tree Protocol
rstp Configure IEEE 802.1W Rapid Spanning Tree Protocol
stp Configure IEEE 802.1D Spanning Tree Protocol

Really appreciate your support   

[Mark Elsen]

 - Ref : https://community.cisco.com/t5/small-business-support-documents/spanning-tree-inter-connect-with-catalyst/ta-p/3141994

 >...

   SMB switch default STP mode is RSTP, and supports MSTP. SMB does not support PVST+ or rapid-PVST+.

              It would seem advisable to keep your core and connected equipment homogeneous

 M.