Configure MLFR (Multilink Frame Relay) on Juniper SRX Firewalls
I came across one of the Integrated Services type firewall, and was asked to configure a MLFR bundle on it. The firewall was Juniper SRX (I admit, I love these boxes). But MLFR on a firewall … who has heard of those. I had prepared for doing a MLPPP but on the turn up call, the service provider wanted us to use MLFR as that’s what they supported for that particular site. For the non techy gurus who are wondering what the MLFR is, it’s a simple Multilink Frame Relay Bundle, meaning you have more than one T1/E1 Link and you bundle them on frame relay (Yes … some of us still use Frame Relay ) More often you would have done MPPP bundling, but the exciting part was to do a MLFR between Juniper and Cisco and on the Juniper end it was a firewall. Here is a simple diagram As you can see the connectivity from customer perspective is pretty simple. There are 2 Physical links going on the Service Provider network (T1 Links) and we need to create a bundle logical connectivity (The Solid red line...