05-23-2013 07:35 AM - edited 03-03-2019 07:05 AM
We are migrating from a 6509e to Nexus 7k. In the design we will also be refreshing the infrastructure IP Addressing and VLANs. My goal is to have both switches running side by side until the migration is completed.
Currently a single 6509 is my core, creating the VTP domain and is the root bridge. We are installing a single 7K with the new IP Addressing scheme and new VLANs. I want to move the VTP and root bridge over to the 7K but am wanting to know if it is possible to make the migration without any affect on the current infrastructure.
1. Would there be any adverse affect of turning off VTP on the 6509 and then bring up the VTP domain on the 7K?
2. Should there be any concern about spanning-tree with changing the root bridge over to the 7K?
Additional information:
Old IP Addressing is 172.25.x.x
New IP Addressing is 10.x.x.x
Old VLANs will be inplay until migration is completed
New VLANs are completely different numbering scheme from the old; no overlap.
Thanks for any advice and/or thoughts.
Dave
Solved! Go to Solution.
05-31-2013 01:51 PM
Hi Dave,
if you are using same vlans or some of them then it is better to have a Trunk between the N7K and Cat65k
allow only the shared vlan between them that are going to be migrated, kkep the 65K as the root, once everything is up make the N7K as the root
since it is single box it is easier as you do not use any HSRP in this case
also there is a good document in Cisco.com about migrating QoS from 65K to N7K that you might read it for more info
VTP keep it transparent on both
hope this help
05-31-2013 02:01 PM
one more important point to add
once you connect both N7K and 65K over a trunk you can have a temporary HSRP for those shared vlans and make the active HSRP same as the stp root of that vlan so you can smoothly migrate the vlans between the both and maintaining the L3/gateway path
05-31-2013 01:51 PM
Hi Dave,
if you are using same vlans or some of them then it is better to have a Trunk between the N7K and Cat65k
allow only the shared vlan between them that are going to be migrated, kkep the 65K as the root, once everything is up make the N7K as the root
since it is single box it is easier as you do not use any HSRP in this case
also there is a good document in Cisco.com about migrating QoS from 65K to N7K that you might read it for more info
VTP keep it transparent on both
hope this help
05-31-2013 02:01 PM
one more important point to add
once you connect both N7K and 65K over a trunk you can have a temporary HSRP for those shared vlans and make the active HSRP same as the stp root of that vlan so you can smoothly migrate the vlans between the both and maintaining the L3/gateway path
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