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Author Topic: DFL-1660 LAN2 & LAN3 on same subnet  (Read 2686 times)

jacob.hillman

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DFL-1660 LAN2 & LAN3 on same subnet
« on: June 07, 2016, 01:50:38 PM »

Hi all,

Thanks in advance for your help! I'm a noob with D-Link equipment, and while I have old training in IT, don't have much experience to speak of. So:

I recently inherited a stand-alone (air gap from our enterprise network) guest WIFI network. It has some issues...

The network is currently a flat topology, with everything on the default VLAN (I know, plans are under development to add depth):
-Router = DSR-500 with one WAN connection with static IP from ISP and two, 1GiB LAN connections:
     -Connection 1 to DGS-3620-28SC L3 switch with 23, 1GiB fiber LAN connections - all to DGS-3620-28PC L3 switches;
          -All 23 DGS-3620-28PCs are configured as DHCP servers and DNS relays for ~80 wireless APs interspersed throughout our publicly accessible areas.
     -Connection 2 to DGS-3620-28PC L3 switch configured as DHCP server and DNS relay with ~13 connections to wireless APs and 2-3 connections to DGS-3620-28PC switches.
          -All DGS-3620-28PCs are configured identically to the 23 connected to the -28SC.
          -Again, we have a total of ~80 wireless APs.

I don't have good documentation from the install, and there was no administration before I entered the picture. All the DGS-series switches appeared to be in default configuration (most've been reconfigured, now...).

The DFL-1660 was powered off in the rack enclosure with the DSR-500 and two DGS-3620 'core' switches. The DSR-500 is a SOHO router, and I've been trying to offload DNS, DHCP and every other function I can to the L3 switches because it's running at ~100% CPU/RAM at all times. I assume this is because it was never intended to support broadcast and routing traffic for x~80 APs + clients.

I want to leave the network IP/subnet configuration in place and replace the DSR-500 with the DFL-1660, which has roughly 2-3 x processing power. In my naive world, this'd consist of disconnecting the two 'core' switches from the DSR, and plugging them into LAN(s) 2 & 3 on the DFL-1660.

I've added a LAN group for interfaces 2 & 3 in the address book, and other areas (though my understanding is that this is redundant/unnecessary - please advise), and used the advice in the following topics in this forum to configure Rules for the LANGrp:
http://forums.dlink.com/index.php?topic=7160.0
http://forums.dlink.com/index.php?topic=13643.0

Our backbone is running on 192.168.105.0/24, and the DSR is our network gateway at 192.168.105.3. I'm drawing a blank on how to configure interfaces 2 & 3 on the DFL so that the downstream connections all see both ports as 192.168.105.3, so I don't have to reconfigure all the devices (we have very limited central management capability, so have to manually configure everything besides the DGS switches (and that's only after I manually configured each of them... - guess what happens when your default admin IP is 10.90.90.90 for ~30 switches all on the same subnet. Yep, it picks a random switch to log you into...).

Any thoughts on how to make that happen?? Right now LAN 2 is 192.168.105.1 and LAN 3 is 192.168.105.2.

The LAN-to-WAN Rules are written so that LANGrp (with LAN 2 network) is the source and WAN 1 (all_subnets) is the destination.
The SAT/NAT rules are with the same source/destination.

Thanks!!

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FurryNutz

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Re: DFL-1660 LAN2 & LAN3 on same subnet
« Reply #1 on: June 27, 2016, 09:03:29 AM »

Any status on this?  ???

Hi all,

Thanks in advance for your help! I'm a noob with D-Link equipment, and while I have old training in IT, don't have much experience to speak of. So:

I recently inherited a stand-alone (air gap from our enterprise network) guest WIFI network. It has some issues...

The network is currently a flat topology, with everything on the default VLAN (I know, plans are under development to add depth):
-Router = DSR-500 with one WAN connection with static IP from ISP and two, 1GiB LAN connections:
     -Connection 1 to DGS-3620-28SC L3 switch with 23, 1GiB fiber LAN connections - all to DGS-3620-28PC L3 switches;
          -All 23 DGS-3620-28PCs are configured as DHCP servers and DNS relays for ~80 wireless APs interspersed throughout our publicly accessible areas.
     -Connection 2 to DGS-3620-28PC L3 switch configured as DHCP server and DNS relay with ~13 connections to wireless APs and 2-3 connections to DGS-3620-28PC switches.
          -All DGS-3620-28PCs are configured identically to the 23 connected to the -28SC.
          -Again, we have a total of ~80 wireless APs.

I don't have good documentation from the install, and there was no administration before I entered the picture. All the DGS-series switches appeared to be in default configuration (most've been reconfigured, now...).

The DFL-1660 was powered off in the rack enclosure with the DSR-500 and two DGS-3620 'core' switches. The DSR-500 is a SOHO router, and I've been trying to offload DNS, DHCP and every other function I can to the L3 switches because it's running at ~100% CPU/RAM at all times. I assume this is because it was never intended to support broadcast and routing traffic for x~80 APs + clients.

I want to leave the network IP/subnet configuration in place and replace the DSR-500 with the DFL-1660, which has roughly 2-3 x processing power. In my naive world, this'd consist of disconnecting the two 'core' switches from the DSR, and plugging them into LAN(s) 2 & 3 on the DFL-1660.

I've added a LAN group for interfaces 2 & 3 in the address book, and other areas (though my understanding is that this is redundant/unnecessary - please advise), and used the advice in the following topics in this forum to configure Rules for the LANGrp:
http://forums.dlink.com/index.php?topic=7160.0
http://forums.dlink.com/index.php?topic=13643.0

Our backbone is running on 192.168.105.0/24, and the DSR is our network gateway at 192.168.105.3. I'm drawing a blank on how to configure interfaces 2 & 3 on the DFL so that the downstream connections all see both ports as 192.168.105.3, so I don't have to reconfigure all the devices (we have very limited central management capability, so have to manually configure everything besides the DGS switches (and that's only after I manually configured each of them... - guess what happens when your default admin IP is 10.90.90.90 for ~30 switches all on the same subnet. Yep, it picks a random switch to log you into...).

Any thoughts on how to make that happen?? Right now LAN 2 is 192.168.105.1 and LAN 3 is 192.168.105.2.

The LAN-to-WAN Rules are written so that LANGrp (with LAN 2 network) is the source and WAN 1 (all_subnets) is the destination.
The SAT/NAT rules are with the same source/destination.

Thanks!!
Logged
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