10-14-2008 11:48 PM - edited 03-06-2019 01:56 AM
I am in the process of planning an upgrade to one of our factories,the problem is the old switches cat 3524s have vlan 1 as their management vlan, and the new 3750s will have vlan 51 as the management vlan, with the same IP subnet, during the cutover I will have both old and new switches on the network
how can I bridge the 2 vlans so I can access both sets of switches, I have been looking at some of the bridging commands, but cannot get it to work,
I have tried
bridge 1 protocol vlan-bridge
int vlan 1
bridge-group 1
int vlan51
ip address 192.168.51.252 255.255.255.0
bridge-group 1
Also tried
bridge irb
bridge 1 route IP
and put the ip address on
the BVI interface
any body done this
10-15-2008 03:29 AM
there is no support for ip bridging.. try to type into google.com "cisco 3750 vlan brdige fallback briding" or something like that :)
10-15-2008 03:39 AM
The question is was the old 3524's trunked before ? If not then you don't have to change anything just hook it up to the new vlan . If it was trunked then you will have to create a new SVI on your 3524's for vlan 51 with the address on it and shut the vlan1 management interface down . You would have to create a layer 2 vlan for 51 also.
10-15-2008 01:11 PM
yes there is trunking, as I have a number of vlans, I was hoping I could do some sort of bridging so that I would not have to do any changes, because I also Have APs running their Management/native vlan on 1 so need to do changes there as well...
10-15-2008 09:02 PM
I have fixed my problem by extending vlans 1 and 51 to the site 3845 router and enabling bridging on the 3845
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