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Replacement of 2 Cisco Co...

Replacement of 2 Cisco Core Switches with S6720-54C-EI-48S

Created: Jan 15, 2020 16:29:23Latest reply: Jan 21, 2020 10:50:04 325 5 0 0
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Hello,


we bought 2 S6720-54C-EI-48S which are the designated replacement for our very old core switches in a production network.

Currently we are using Cisco only for this network.


The downtime should be as short as possible so I ask for your help on how to do so.


-I already learnt that I can avoid STP problems by using VBST. 

-The ether channel and HSRP shouldn't be any problem too.


But for VTP I'm a bit nervous.

We are using VTPv3 server.


I need to configure VCMP, but how can avoid a to long downtime?


Switch back to transparent setup on all access switches before replacement?..

Do I need to move to version 1 or 2?


Thanks in advance for your help!







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chenhui
Admin Created Jan 17, 2020 00:48:32 Helpful(0) Helpful(0)

Hi,

if your network topology is similar as the graph below, and you just trying replacing two Cisco core switches to S6720, I would suggest you to migrate the VTP to the Cisco access switch. But you said no VTP server would exist after the migration, and due to the VCMP and VTP is not compatible with each other, so you have to configure the VLANs manually on all the switches.

topo


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chenhui
Admin Created Jan 16, 2020 01:14:56 Helpful(0) Helpful(0)

Hello @ComputaSayzNo

It depends on your live network. 

Since you didn't provide a topology, it's tough to offer the appropriate advise.

But you can refer to Interworking and Replacement Guide VTP, it provides a brief method to replace VTP.

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ComputaSayzNo
ComputaSayzNo Created Jan 16, 2020 14:35:52
Thanks for your answer!
Our topology is a full redundant Cisco environment with 2 Cisco core switches.
(no vss. just hsrp)
I only need to replace both core switches. All the redundant connected access switches will stay the same - Cisco C2960X.
But they will be redundantly connected to the S6720 Huawei switches.
After the change there will be no VTP server anymore.  
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chenhui
chenhui Admin Created Jan 16, 2020 01:14:56 Helpful(0) Helpful(0)

Hello @ComputaSayzNo

It depends on your live network. 

Since you didn't provide a topology, it's tough to offer the appropriate advise.

But you can refer to Interworking and Replacement Guide VTP, it provides a brief method to replace VTP.

View more
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ComputaSayzNo
ComputaSayzNo Created Jan 16, 2020 14:35:52
Thanks for your answer!
Our topology is a full redundant Cisco environment with 2 Cisco core switches.
(no vss. just hsrp)
I only need to replace both core switches. All the redundant connected access switches will stay the same - Cisco C2960X.
But they will be redundantly connected to the S6720 Huawei switches.
After the change there will be no VTP server anymore.  
chenhui
chenhui Admin Created Jan 17, 2020 00:48:32 Helpful(0) Helpful(0)

Hi,

if your network topology is similar as the graph below, and you just trying replacing two Cisco core switches to S6720, I would suggest you to migrate the VTP to the Cisco access switch. But you said no VTP server would exist after the migration, and due to the VCMP and VTP is not compatible with each other, so you have to configure the VLANs manually on all the switches.

topo


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uzzi
uzzi Created Jan 19, 2020 06:57:36 Helpful(0) Helpful(0)

Or you can enable GVRP on Huawei core switches so you create all vlan(s) on one core switch and it will pass on to another core (in between huawei switches only).

Below is the document for GVRP implementation and guidelines.

https://support.huawei.com/enterprise/en/doc/EDOC1000142081/7f439e5f/gvrp-configuration

Thank you.

Kindest regards,
Uzzi
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ComputaSayzNo
ComputaSayzNo Created Jan 21, 2020 10:50:04 Helpful(0) Helpful(0)

Thanks guys! I will switch to transparent setup for the while being and switch to VCMP once we replace the Cisco access switches with Huawei devices.

br
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