Leaseline Setup

Hi so im sure someone has (maybe) asked this before. <br/>
<br/>
my company recently put in a leaseline order (wires only). usually we connect a router to whatever firewall the providers install and configure the ipaddress of the wan but this one is different. <br/>
we have a dreytek 2962 plugged directly into the ADVA box via single mode fibre as requested. <br/>
i configure the lease wan ip subnet and gateway as given to me by the provider but they have then given me a 'Lan side IP' which they have said ;<br/>
<br/>
"you will need to ensure the following IPs are set in your Primary WAN interface. <br/>
CPE: 212.xxx.xxx.42<br/>
AR: 212.xxx.xxx.43<br/>
Subnet mask: 255.255.255.254 <br/>
you will need to either, use your only usable IP address of 195.xxx.xxx.25 in your next device, or if you require more IPs, you will need to NAT 195.xxx.xxx.24/30 into a DHCP range, defined in the draytek. <br/>
LAN Range : 195.xxx.xxx.24/30<br/>
Subnet mask: 255.255.255.252<br/>
useable IP: 195.xxx.xxx.25<br/>
DNS IPs: 195.xxx.xxx.70 + 195.xxx.xxx.10 "<br/>
<br/>
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My question is how/can i set this up in a 2962 without connecting another device to it as a router? originally they suggested adding the lan address as a wan ip alias but your only able to add and ipaddress, unless i can add it as 195.xxx.xxx.24/30

This is how I have one of ours configured with a /29<br/>
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<img src='https://valar.equinoxitc.co.uk/nextcloud/index.php/s/8FbXWfH6FQPW2JQ/preview'/>