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Webcast-Catalyst9k
New Member

Emigrating Sub Networks in the same control of broadcast

At present I have the following configuration in a msfc of 6509:

interface Vlan1

ip address 172.23.8.1 255.255.252.0

In this Sub net live together users, servers and printers. The most of the servers they are found in the rank 172.23.11.0.

Now how I can do to emigrate the servers and printers to segment 172.23.11.0/24, little by little, without have that to do it all to same time.

If it was the segment 172.23.50.0/24 that wanted to emigrate for example, itself that alone I have to add the command:

interface Vlan1

ip address 172.23.8.1 255.255.252.0 ip address 172.23.50.1 255.255.255.0 secondary.

I can do somewhat similar in previous case.

In the same network I have a router 3700 configured of the following one vlan:

Interface Fastethernet0/1.1 encapsulation dot1q 1 native

ip address 172.23.8.4 255.255.252.0

1 ACCEPTED SOLUTION

Accepted Solutions
Purple

Re: Emigrating Sub Networks in the same control of broadcast

Hello,

I agree that the way to make this work is to add a secondary address to your VLAN interface in the 172.23.11.x range with a mask of 255.255.255.0.

Then, point your servers default gateway to this address and change their masks to /24. When the servers wish to communicate with other hosts in the 172.23.11.x range, normal ARPs for the addresses will be sent. When the servers wish to communicate with other hosts in the 172.23.8/9/10 range, they will send the packets to the default gateway which will send it back out over the same interface.

So that strategy would work quite well.

Hope that helps - pls rate the post if it does.

Paresh

2 REPLIES
Purple

Re: Emigrating Sub Networks in the same control of broadcast

Hello,

I agree that the way to make this work is to add a secondary address to your VLAN interface in the 172.23.11.x range with a mask of 255.255.255.0.

Then, point your servers default gateway to this address and change their masks to /24. When the servers wish to communicate with other hosts in the 172.23.11.x range, normal ARPs for the addresses will be sent. When the servers wish to communicate with other hosts in the 172.23.8/9/10 range, they will send the packets to the default gateway which will send it back out over the same interface.

So that strategy would work quite well.

Hope that helps - pls rate the post if it does.

Paresh

New Member

Re: Emigrating Sub Networks in the same control of broadcast

Hello,

Thanks by attending the question.

That happen when for example the hosts 172.23.8.4/22 try to be communicated with the host 172.23.11.5/24.

Not have conflicts in the router when this to understand that there are two equal routes to try to arrive to hosts.

On the other hand that happen when a host 172.23.2.6/24 configured in another router in the same network tried to be communicated with the same sub net 172.23.11.4/24 ¿Not have conflicts to understand that there are two equal routes for the same one hosts?

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