Network Management

I have recently redesigned my entire LAN topology, and am in the process of upgrading, and eliminating some old devices. One of these old units is an Adtran Netvanta 3448 router (R01). My predecessors set this particular device up as the Default Gateway (D/G), and it was set into the network incorrectly. As a result of the D/G status, almost every device with a Static IP lists it as the D/G. This is causing problems as I strive to implement a new firewall and replace other Netvanta routers.

 

I am working to change the D/G to the true gateway "R00A", but have run into a snag with R01's IP Address.

 

I have transferred all of the routes from R01, to my main LAN Switch (SW06, the Aruba 2930M 24G PoE+ Switch (JL320A), currently booted to firmware version, WC.16.05.0007), but now need to do something with R01's IP Address, 10.20.62.2.

 

How can I tell SW06 to translate 10.20.62.2 into 10.20.61.1? This way I don't lose a LOT of critical services on essential servers. Also, this would help me identify every computer with the old D/G in a more reasoned, and calm manner. BOTH R00A and R01 are directly connected to SW06. It would also provide me with the means to turn off this old device.

 

Thank you,

 

David

Hello David,

I don’t know if I understand you correctly, but it seems that you want a way to keep the devices with static ip pointing to ip address 10.20.60.2 as the default gateway, right? Have thought about using the ip address 10.20.60.2 as secondary on 2930 switch? This way those devices will not atop working during rhe migration.
Sorry if I understand you wrong.

Regards.

Minondas,

 

That sounds like the ticket! How do I set up the secondary IP Address?

 

THANK YOU!

 

David

Hi David,

 

The switch will accped a secondary ip that is not on the same subnet of any other ip address configured on the switch, so if your scenario allows it you can simple add a secondary ip to the vlan like the commands below:

 

vlan 42

   name "Test 42"

   tagged 46

   untagged 14,40

   ip address 10.4.2.1 255.255.255.0

   ip address 10.4.3.1 255.255.255.0

 

 

If that doen't help and you need a secondary ip address that is on the same subnet as the primary ip, you can create a vrrp on that vlan.

 

 

router vrrp

   virtual-ip-ping

   ipv4 enable

   exit

!

vlan 42

   name "Test 42"

   tagged 46

   untagged 14,40

   ip address 10.4.2.1 255.255.255.0

   ip igmp

   vrrp vrid 1

      virtual-ip-address 10.4.2.3

      enable

      exit

   dhcp-server

   exit

 

I hope this helps.

 

Regards.

Minondas,

 

I'm just a little confused. I think I understand the concept, but I'm not grasping the commands.

 

Let me see if I can help you help me.

 

I have to do this by making the secondary IP address, one on the same VLAN as the switch's primary VLAN. Here is what exists:

 

SW06 - VLAN1 - 10.20.61.253/16 - SW06s Def. G-way is 10.20.61.1/16 

I need to add 10.20.62.2 as the secondary address, before I do I have to disconnect the device that has that address.

 

VLAN1 is named VLAN1.

 

All ports are properly tagged at this time, and the IP Address is assigned to the VLAN.

 

So, do I then just have to enter the following?

 

   router vrrp

      virtual-ip-ping

      ipv4 enable

      exit

   !

   vlan 1

      ip igmp

      vrrp vrid 1

         virtual-ip-address 10.20.62.2

      enable

      exit

 

Thank you for your assistance, and patience.

 

David

Here is what I understand from you scenario.

If it is correct, you will need to use vrrp like the example below.

With this configuration you be able to remove the old router from your network, but the devices with static will continue to work as their default gateway IP will be up ont eh switch.

 

 router vrrp

      virtual-ip-ping

      ipv4 enable

      exit

   !

   vlan 1

      ip igmp

      vrrp vrid 1

         virtual-ip-address 10.20.62.2

      enable

      exit

 

 

One glitch was discovered after I entered the above.

I lost Internet connectivity on all computers with a Default Gateway of 10.20.62.2.

VLAN1 -- Default Gateway is 10.20.61.1

It appears the "vrrp vrid 1" did not pass traffic to the above gateway.

Any thoughts?

Thanks,